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{{About|the process|the water carbonator|Gasogene|the automobile device|Wood gas generator}}
{{Sustainable energy}}
 
'''Gasification''' is a process that converts [[biomass|organic]] or [[fossil fuel|fossil]] based [[carbon]]aceous materials into [[carbon monoxide]], [[hydrogen]] and [[carbon dioxide]]. This is achieved by reacting the material at high temperatures (>700 °C), without combustion, with a controlled amount of [[oxygen]] and/or [[steam]]. The resulting gas mixture is called ''[[syngas]]'' (from ''synthesis gas'' or ''synthetic gas'') or ''[[producer gas]]'' and is itself a fuel. The power derived from gasification and combustion of the resultant gas is considered to be a source of [[renewable energy]] if the gasified compounds were obtained from biomass.<ref name="nnfcc">[[National Non-Food Crops Centre]]. [http://www.nnfcc.co.uk/tools/review-of-technologies-for-gasification-of-biomass-and-wastes-nnfcc-09-008 "Review of Technologies for Gasification of Biomass and Wastes, NNFCC 09-008"], Retrieved on 2011-06-24</ref><ref>[http://www.biomass.uk.com/gasification.php The Clean and Renewable Energy Source], www.biomass.uk.com, accessed 16.05.11</ref><ref>[http://www.gastechnology.org/webroot/app/xn/xd.aspx?it=enweb&xd=iea/homepage.xml Thermal Gasification of Biomass, International Energy Agency Task 33], www.gastechnology.org, accessed 16.05.11</ref><ref>[http://www.waste-management-world.com/index/display/article-display/368649/articles/waste-management-world/volume-10/issue-4/features/plasma-gasification-clean-renewable-fuel-through-vaporization-of-waste.html Clean Renewable Fuel from the Plasma Gasification of Waste], www.waste-management-world.com, Accessed 16.05.2011</ref>
 
The advantage of gasification is that using the syngas is potentially more efficient than direct combustion of the original fuel because it can be combusted at higher temperatures or even in [[fuel cell]]s, so that the thermodynamic upper limit to the efficiency defined by [[Carnot's rule]] is higher or not applicable. Syngas may be burned directly in [[internal combustion engines|gas engines]], used to produce [[methanol]] and hydrogen, or converted via the [[Fischer–Tropsch process]] into [[synthetic fuel]]. Gasification can also begin with material which would otherwise have been disposed of such as [[organic waste|biodegradable waste]]. In addition, the high-temperature process refines out corrosive ash elements such as [[chloride]] and [[potassium]], allowing clean gas production from otherwise problematic fuels. Gasification of [[fossil fuels]] is currently widely used on industrial scales to generate electricity.<ref>Chris Higman and Maarten van der Burgt. ''Gasification'', Second Edition, Elsevier (2008).</ref>
 
==History==
[[File:Adler Diplomat 3 GS mit Holzgasgenerator-hinten rechts.JPG|thumb|right|[[Adler Diplomat]] 3 with gas generator (1941)]]
 
The process of producing energy using the gasification method has been in use for more than 180 years. During that time [[coal]] and [[peat]] were used to power these plants. Initially developed to produce [[town gas]] for lighting & cooking in 1800s, this was replaced by electricity and [[natural gas]], it was also used in [[blast furnaces]] but the bigger role was played in the production of [[Chemical synthesis|synthetic]] chemicals where it has been in use since the 1920s.
 
During both [[world wars]] especially the [[Second World War]] the need of gasification produced fuel reemerged due to the shortage of petroleum.<ref>[http://membres.lycos.fr/rotarysu/nouvelle.htm Gas Generator Project] History of the Gasogene technology</ref> [[Wood gas generator]]s, called Gasogene or Gazogène, were used to power motor vehicles in [[Europe]]. By 1945 there were trucks, buses and agricultural machines that were powered by gasification. It is estimated that there were close to 9,000,000 vehicles running on producer gas all over the world.
 
==Chemical reactions==
In a gasifier, the carbonaceous material undergoes several different processes:
[[File:pyrolysis.svg|frame|Pyrolysis of carbonaceous fuels]]
[[File:gasification.gif|frame|Gasification of char]]
# The [[dehydration reaction|dehydration]] or drying process occurs at around 100°C.  Typically the resulting steam is mixed into the gas flow and may be involved with subsequent chemical reactions, notably the water-gas reaction if the temperature is sufficiently high enough (see step #5).
# The ''[[pyrolysis]]'' (or devolatilization) process occurs at around 200-300°C.  Volatiles are released and [[charring|char]] is produced, resulting in up to 70% weight loss for coal. The process is dependent on the properties of the carbonaceous material and determines the structure and composition of the char, which will then undergo gasification reactions.
# The ''[[combustion]]'' process occurs as the volatile products and some of the char reacts with oxygen to primarily form carbon dioxide and small amounts of carbon monoxide, which provides heat for the subsequent gasification reactions. Letting '''C''' represent a carbon-containing [[organic compound]], the basic reaction here is <math>{\rm C} + {\rm O}_2 \rarr {\rm CO}_2</math>
# The ''gasification'' process occurs as the char reacts with carbon and steam to produce carbon monoxide and hydrogen, via the reaction <math>{\rm C} + {\rm H}_2 {\rm O} \rarr {\rm H}_2 + {\rm CO}</math>
# In addition, the [[reversible reaction|reversible]] gas phase [[water-gas shift reaction]] reaches [[chemical equilibrium|equilibrium]] very fast at the temperatures in a gasifier. This balances the concentrations of carbon monoxide, steam, carbon dioxide and hydrogen. <math>{\rm CO} + {\rm H}_2 {\rm O} \lrarr {\rm CO}_2 + {\rm H}_2</math>
 
In essence, a limited amount of oxygen or air is introduced into the reactor to allow some of the organic material to be "burned" to produce carbon dioxide and energy, which drives a second reaction that converts further organic material to hydrogen and additional carbon dioxide. Further reactions occur when the formed carbon monoxide and residual [[water]] from the organic material react to form methane and excess carbon dioxide (4 CO + 2 H2O --> CH4 + 3 CO2). This third reaction occurs more abundantly in reactors that increase the [[residence time]] of the reactive gases and organic materials, as well as heat and pressure. [[Catalysts]] are used in more sophisticated reactors to improve reaction rates, thus moving the system closer to the reaction equilibrium  for a fixed residence time.
 
==Gasification processes==
Several types of gasifiers are currently available for commercial use: counter-current fixed bed, co-current fixed bed, [[fluidized bed]], entrained flow, plasma, and free radical.<ref name="nnfcc"/><ref>Beychok, M.R., ''Process and environmental technology for producing SNG and liquid fuels'', U.S. EPA report EPA-660/2-75-011, May 1975</ref><ref>Beychok, M.R., ''Coal gasification for clean energy'', Energy Pipelines and Systems, March 1974</ref><ref>Beychok, M.R., ''Coal gasification and the Phenosolvan process'', American Chemical Society 168th National Meeting, Atlantic City, September 1974</ref>
 
===Counter-current fixed bed ("up draft") gasifier===
A fixed bed of carbonaceous fuel (e.g. coal or biomass) through which the "gasification agent" (steam, oxygen and/or air) flows in counter-current configuration.<ref>Thanapal SS, Annamalai K, Sweeten J, Gordillo G, (2011), “Fixed bed gasification of dairy biomass with enriched air mixture”. Appl Energy, doi:10.1016/j.apenergy.2011.11.072</ref> The ash is either removed in the dry condition or as a [[slag]]. The slagging gasifiers have a lower ratio of steam to carbon,<ref>{{Cite conference|title=Development Status of BGL-Gasification|url=http://www.iec.tu-freiberg.de/conference/conference_05/pdf/21_Picard.pdf|format=PDF|last1=Kamka|first1=Frank|last2=Jochmann|first2=Andreas|date=June 2005|conference=International Freiberg Conference on IGCC & XtL Technologies|others=speaker Lutz Picard|accessdate=2011-03-19}}</ref> achieving temperatures higher than the ash fusion temperature. The nature of the gasifier means that the fuel must have high mechanical strength and must ideally be non-caking so that it will form a permeable bed, although recent developments have reduced these restrictions to some extent. The throughput for this type of gasifier is relatively low. Thermal efficiency is high as the temperatures in the gas exit are relatively low. However, this means that tar and methane production is significant at typical operation temperatures, so product gas must be extensively cleaned before use. The tar can be recycled to the reactor.
 
In the gasification of fine, undensified biomass such as [[rice husks|rice hulls]], it is necessary to blow air into the reactor by means of a fan. This creates very high gasification temperature, as high as 1000 C. Above the gasification zone, a bed of fine and hot char is formed, and as the gas is blow forced through this bed, most complex hydrocarbons are broken down into simple components of hydrogen and carbon monoxide.{{Citation needed|date=July 2011}}
 
===Co-current fixed bed ("down draft") gasifier===
Similar to the counter-current type, but the gasification agent gas flows in co-current configuration with the fuel (downwards, hence the name "down draft gasifier"). Heat needs to be added to the upper part of the bed, either by combusting small amounts of the fuel or from external heat sources. The produced gas leaves the gasifier at a high temperature, and most of this heat is often transferred to the gasification agent added in the top of the bed, resulting in an energy efficiency on level with the counter-current type. Since all tars must pass through a hot bed of char in this configuration, tar levels are much lower than the counter-current type.
 
===Fluidized bed reactor===
The fuel is [[fluidization|fluidized]] in oxygen and steam or air. The ash is removed dry or as heavy agglomerates that defluidize. The temperatures are relatively low in dry ash gasifiers, so the fuel must be highly reactive; low-grade coals are particularly suitable. The agglomerating gasifiers have slightly higher temperatures, and are suitable for higher rank coals. Fuel throughput is higher than for the fixed bed, but not as high as for the entrained flow gasifier. The conversion efficiency can be rather low due to [[elutriation]] of carbonaceous material.  Recycle or subsequent combustion of solids can be used to increase conversion. Fluidized bed gasifiers are most useful for fuels that form highly corrosive ash that would damage the walls of slagging gasifiers. Biomass fuels generally contain high levels of corrosive ash.
 
===Entrained flow gasifier===
A dry pulverized solid, an atomized liquid fuel or a fuel slurry is gasified with oxygen (much less frequent: air) in co-current flow. The gasification reactions take place in a dense cloud of very fine particles. Most coals are suitable for this type of gasifier because of the high [[operating temperature]]s and because the coal particles are well separated from one another.
 
The high temperatures and pressures also mean that a higher throughput can be achieved, however thermal efficiency is somewhat lower as the gas must be cooled before it can be cleaned with existing technology. The high temperatures also mean that tar and methane are not present in the product gas; however the oxygen requirement is higher than for the other types of gasifiers. All entrained flow gasifiers remove the major part of the ash as a slag as the operating temperature is well above the ash fusion temperature.
 
A smaller fraction of the ash is produced either as a very fine dry [[fly ash]] or as a black colored fly ash slurry. Some fuels, in particular certain types of biomasses, can form slag that is corrosive for ceramic inner walls that serve to protect the gasifier outer wall. However some entrained flow type of gasifiers do not possess a ceramic inner wall but have an inner water or steam cooled wall covered with partially solidified slag. These types of gasifiers do not suffer from corrosive slags.
 
Some fuels have ashes with very high ash fusion temperatures. In this case mostly limestone is mixed with the fuel prior to gasification. Addition of a little limestone will usually suffice for the lowering the fusion temperatures. The fuel particles must be much smaller than for other types of gasifiers. This means the fuel must be pulverized, which requires somewhat more energy than for the other types of gasifiers. By far the most energy consumption related to entrained flow gasification is not the milling of the fuel but the production of oxygen used for the gasification.
 
===Plasma gasifier===
In a [[Plasma gasification|plasma gasifier]] a high-voltage current is fed to a torch, creating a high-temperature arc. The inorganic residue is retrieved as a glass-like substance.
 
==Feedstock==
There are a large number of different feedstock types for use in a gasifier, each with different characteristics, including size, shape, bulk density, moisture content, energy content, chemical composition, ash fusion characteristics, and homogeneity of all these properties. Coal and petroleum coke are used as primary feedstocks for many large gasification plants worldwide. Additionally, a variety of biomass and waste-derived feedstocks can be gasified, with wood pellets and chips, waste wood, plastics and aluminium, [[Municipal Solid Waste]] (MSW), [[Refuse-derived fuel]] (RDF), agricultural and industrial wastes, sewage sludge, switch grass, discarded seed corn, corn stover and other crop residues all being used.<ref name="nnfcc"/>
 
[[Chemrec]] has developed a process for gasification of [[black liquor]].<ref name="chemrec"/>
 
===Waste disposal===
[[File:Reactor .jpg|right|thumbnail|150px|HTCW reactor, one of several proposed waste gasification processes. According to the sales and sales management consultants ''KBI Group'' a pilot plant in Arnstadt implementing this process has completed initial tests.<ref>[http://www.htcw.info HTCW commercial web page]</ref>]]
 
Waste gasification has several advantages over incineration:
* The necessary extensive flue gas cleaning may be performed on the syngas instead of the much larger volume of [[flue gas]] after combustion.
* [[Electric power]] may be generated in [[internal combustion engine|engines]] and [[gas turbine]]s, which are much cheaper and more efficient than the [[Rankine cycle|steam cycle]] used in incineration. Even fuel cells may potentially be used, but these have rather severe requirements regarding the purity of the gas.
* Chemical processing ([[Gas to liquids]]) of the syngas may produce other synthetic fuels instead of electricity.
* Some gasification processes treat ash containing heavy metals at very high temperatures so that it is released in a glassy and chemically stable form.
 
A major challenge for waste gasification technologies is to reach an acceptable (positive) gross electric efficiency. The high efficiency of converting syngas to electric power is counteracted by significant power consumption in the waste preprocessing, the consumption of large amounts of pure oxygen (which is often used as gasification agent), and gas cleaning. Another challenge becoming apparent when implementing the processes in real life is to obtain long service intervals in the plants, so that it is not necessary to close down the plant every few months for cleaning the reactor.
 
Environmental advocates have called gasification "incineration in disguise" and argue that the technology is still dangerous to air quality and public health.  "Since 2003 numerous proposals for waste treatment facilities hoping to use... gasification technologies failed to receive final approval to operate when the claims of project proponents did not withstand public and governmental scrutiny of key claims," according to the Global Alliance for Incinerator Alternatives.<ref>[http://www.no-burn.org/downloads/Incinerators%20in%20Disguise:%20Case%20Studies%20of%20Gasification,%20Pyrolysis,%20and%20Plasma%20in%20Europe,%20Asia,%20and%20the%20United%20States%20.pdf GAIA Report]</ref> One facility which operated from 2009-2011 in Ottawa had 29 "emissions incidents" and 13 "spills" over those three years.  It was also only able to operate roughly 25% of the time.<ref>[http://www.zerowasteottawa.com/docs/141-RT-3557_RevA_PTR%20Final%20Assessment%20Report%20FINAL.pdf Plasco Energy Group Demonstration Project Final Report]</ref>
 
Several waste gasification processes have been proposed, but few have yet been built and tested, and only a handful have been implemented as plants processing real waste, and most of the time in combination with fossil fuels.<ref>[http://www.environment-agency.gov.uk/wtd/679004/679021/679065/ Gasification case studies] by the [[Environment Agency]] of England and Wales</ref>
 
One plant (in [[Chiba, Chiba|Chiba]], [[Japan]] using the Thermoselect process<ref>[http://www.thermoselect.com Thermoselect website] &mdash; A waste gasification plant supplier</ref>) has been processing industrial waste since year 2000, but has not yet documented positive net energy production from the process.
 
In the [[USA]], gasification of waste is expanding across the country. [[Ze-gen]] is operating a waste gasification demonstration facility in [[New Bedford, Massachusetts]]. The facility was designed to demonstrate gasification of specific non-MSW waste streams using ''liquid metal gasification''.<ref>{{Cite news
  | title = Teaching the Government to Love Garbage
  | work = [[GreenTech]]
  | date = 2009-12-14
  | url = http://news.cnet.com/greentech/?keyword=Ze-gen
  | accessdate = 2010-01-07}}
</ref> This facility came after widespread public opposition shelved plans for a similar plant in [[Attleboro, Massachusetts]].<ref>{{cite web |url=http://www.thesunchronicle.com/news/news_updates/ze-gen-withdraws-plans-for-attleboro-gasification-plant/article_38e57ba7-249b-5d77-ad8b-9f247d127723.html |title=
Ze-gen withdraws plans for Attleboro gasification plant |publisher=The Sun Chronicle}}</ref> In addition, construction of a biomass gasification plant [http://www.ajc.com/news/dekalb/biomass-proposal-draws-protesters-976960.html was approved in DeKalb County, Georgia on June 14, 2011].
 
Also in the USA, plasma is being used to gasify municipal solid waste, hazardous waste and biomedical waste at the Hurlburt Field Florida Special Operations Command Air Force base.  PyroGenesis Canada Inc. is the technology provider.<ref name="afsoc.af.mil">{{cite web |url=http://www.afsoc.af.mil/news/story.asp?id=123253735 |title=AFSOC makes 'green' history while investing in future |publisher=US Air Force Special Operations Command|accessdate=2011-04-28}}</ref><ref>{{cite journal|last=Tavares|first=Jason R.|coauthors=Rao, Lakshminarayana; Derboghossian, Chawki; Carabin, Pierre; Kaldas, Aïda; Chevalier, Philippe; Holcroft, Gillian|title=Large-Scale Plasma Waste Gasification|journal=Plasma Science, IEEE Transactions on|date=November 2011|volume=39|series=Images in Plasma Science|issue=11|page=2908|doi=10.1109/TPS.2011.2138723|url=http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5762637&tag=1}}</ref>
 
==Current applications==
Syngas can be used for heat production and for generation of mechanical and electrical power. Like other gaseous fuels, producer gas gives greater control over power levels when compared to solid fuels, leading to more efficient and cleaner operation.
 
Syngas can also be used for further processing to liquid fuels or chemicals.
 
===Heat===
Gasifiers offer a flexible option for thermal applications, as they can be retrofitted into existing gas fueled devices such as [[oven]]s, [[furnace]]s, [[boiler]]s, etc., where syngas may replace fossil fuels. [[Heating value]]s of syngas are generally around 4-10 MJ/m<sup>3</sup>.
 
===Electricity===
Industrial-scale gasification is currently mostly used to produce electricity from fossil fuels such as coal, where the syngas is burned in a gas turbine. Gasification is also used industrially in the production of electricity, ammonia and liquid fuels (oil) using Integrated Gasification Combined Cycles ([[Integrated Gasification Combined Cycle|IGCC]]), with the possibility of producing methane and hydrogen for fuel cells. IGCC is also a more efficient method of CO<sub>2</sub> capture as compared to conventional technologies. IGCC demonstration plants have been operating since the early 1970s and some of the plants constructed in the 1990s are now entering commercial service.
 
===Combined heat and power===
In small business and building applications, where the wood source is sustainable, 250-1000 kWe and new zero carbon biomass gasification plants have been installed in Europe that produce tar free syngas from wood and burn it in reciprocating engines connected to a generator with heat recovery. This type of plant is often referred to as a wood biomass CHP unit but is a plant with seven different processes: biomass processing, fuel delivery, gasification, gas cleaning, waste disposal, electricity generation and heat recovery.<ref>[http://www.alfagy.com/index.php?option=com_content&view=article&id=5&Itemid=6 Wood Gasification CHP / Cogeneration Plants], 02.09.09</ref>
 
===Transport fuel===
[[Diesel engine]]s can be operated on dual fuel mode using producer gas. Diesel substitution of over 80% at high loads and 70-80% under normal load variations can easily be achieved.<ref>[http://www.kedco.com/ind/industrial/principles-of-gasification/ Gasification Appliances Review], 04.02.08</ref> [[Spark ignition engine]]s and [[Solid oxide fuel cell|SOFC fuel cells]] can operate on 100% gasification gas.<ref>[http://e-collection.ethbib.ethz.ch/view/eth:41553 Electricity from wood through the combination of gasification and solid oxide fuel cells], Ph.D. Thesis by Florian Nagel, Swiss Federal Institute of Technology Zurich, 2008</ref><ref>[http://orbit.dtu.dk/getResource?recordId=209388&objectId=1&versionId=1 Characterization of biomass producer gas as fuel for stationary gas engines in combined heat and power production], Ph.D. Thesis by Jesper Ahrenfeldt, Technical University of Denmark March 2007</ref><ref>[http://www.biocellus.com/pdf/High_temperature_electrolyte.pdf High temperature electrolyte supported Ni-GDC/YSZ/LSM SOFC operation on two-stage Viking gasifier product gas], Ph. Hofmann ''et al''. in Journal of Power Sources 173 (2007) 357–366</ref> Mechanical energy from the engines may be used for e.g. driving water pumps for irrigation or for coupling with an alternator for electrical power generation.
 
While small scale gasifiers have existed for well over 100 years, there have been few sources to obtain a ready to use machine. Small scale devices are typically [[DIY]] projects. However, currently in the [[United States]], several companies offer gasifiers to operate small engines. In 2009 21stCenturyMotorworks claimed to have developed gasification technology in a prototype pickup truck that could use any biomass materials for fuel,<ref>[http://www.21stcenturymotorworks.com/Press.html 21stCenturyMotorworks web page]</ref> the vehicle was displayed at multiple events including the 2009 Boston Greenfest.
 
===Renewable energy and fuels===
[[File:Holzvergasung.jpg|thumb|230px|Gasification plant Güssing, Austria (2006)]]
In principle, gasification can proceed from just about any organic material, including biomass and plastic waste. The resulting syngas can be combusted. Alternatively, if the syngas is clean enough, it may be used for power production in gas engines, gas turbines or even fuel cells, or converted efficiently to [[dimethyl ether]] (DME) by methanol dehydration, methane via the [[Sabatier reaction]], or diesel-like synthetic fuel via the [[Fischer–Tropsch process]]. In many gasification processes most of the inorganic components of the input material, such as metals and minerals, are retained in the ash. In some gasification processes (slagging gasification) this ash has the form of a glassy solid with low [[Leaching (chemical science)|leaching]] properties, but the net power production in slagging gasification is low (sometimes negative) and costs are higher.
 
Regardless of the final fuel form, gasification itself and subsequent processing neither directly emits nor traps [[greenhouse gases]] such as carbon dioxide. Power consumption in the gasification and syngas conversion processes may be significant though, and may indirectly cause CO<sub>2</sub> emissions; in slagging and plasma gasification, the electricity consumption may even exceed any power production from the syngas.
 
Combustion of syngas or derived fuels emits exactly the same amount of carbon dioxide as would have been emitted from direct combustion of the initial fuel.{{dubious|date=December 2011}} Biomass gasification and combustion could play a significant role in a renewable energy economy, because biomass production removes the same amount of CO<sub>2</sub> from the atmosphere as is emitted from gasification and combustion.{{dubious|date=December 2011}} While other biofuel technologies such as biogas and [[biodiesel]] are [[carbon neutral]], gasification in principle may run on a wider variety of input materials and can be used to produce a wider variety of output fuels.
 
There are at present a few industrial scale biomass gasification plants. Since 2008 in Svenljunga, [[Sweden]], a biomass gasification plant generates up to 14 MW<sub>th</sub>, supplying industries and citizens of Svenljunga with process steam and [[district heating]], respectively. The gasifier uses [[biomass fuels]] such as [[Chromated copper arsenate|CCA]] or [[creosote]] impregnated waste wood and other kinds of recycled wood to produces syngas that is combusted on site.<ref name="Elmia">[http://www.mynewsdesk.com/se/pressroom/elmia/pressrelease/view/foergasning-ger-laegre-utslaepp-mindre-stoft-och-bredare-braenslebas-nyhet-paa-elmia-recycling-to-energy-2010-381629 Gasification allows less emissions, less dust and fuel flexibility] - News at Elmia Recycling to Energy 2010, 03.03.11</ref><ref>[http://www.iqr.se/en/products/combustion/sfc.aspx SFC - Soot Free Combustion: large scale biomass gasification], 03.03.11</ref> In 2011 a similar gasifier, using the same kinds of fuels, is being installed at [http://info.munkforsenergi.se/ Munkfors Energy]'s [[Cogeneration|CHP]] plant. The CHP plant will generate 2 MW<sub>e</sub> (electricity) and 8 MW<sub>th</sub> ([[district heating]]).<ref>[http://www.mynewsdesk.com/uk/view/pressrelease/biofuel-gasification-in-unique-chp-plant-601686 Biofuel gasification in unique CHP plant], 04.04.11</ref><ref>[http://www.nordiskaprojekt.se/kraftvarme/1738/munkfors-energi-investerar-i-ny-kraftvaermeanlaeggning.aspx Munkfors Energy invests in new combined heat and power plant], 03.03.11</ref>
 
Examples of demonstration projects include:
* Those of the Renewable Energy Network Austria,<ref>[http://www.renet.at/main_en.php RENET - The path to energy autonomy<!-- Bot generated title -->]</ref> including a plant using dual fluidized bed gasification that has supplied the town of [[Güssing]] with 2&nbsp;MW of electricity, produced utilising [[GE Jenbacher]] reciprocating [[gas engine]]s<ref>[http://www.clarke-energy.co.uk/case-studies/Case%20Study%20Gussing.pdf Gussing Biomass Power Plant], www.clarke-energy.com, accessed 17.05.2011</ref><ref>[http://www.idgte.ca/Pagemill_Resources/Presentations_0608/GEJenbacher%20Presentation.pdf Latest Developments in the Utilisation of Wood Gas in Gas Engines], www.idgte.ca, accessed 17.05.2011</ref> and 4&nbsp;MW of heat,<ref>[http://www.ficfb.at The FICFB-gasification system<!-- Bot generated title -->]</ref> generated from wood chips, since 2003.
* Chemrec's pilot plant in [[Piteå]] that has produced 3&nbsp;MW of clean syngas since 2006, generated from entrained flow gasification of black liquor.<ref name="chemrec">[http://www.chemrec.se Chemrec web site]</ref>
* The US Air Force Transportable Plasma Waste to Energy System (TPWES) facility at Hurlburt Field, Florida.<ref name="afsoc.af.mil"/>
 
==See also==
{{Portal|Energy|Renewable energy|Sustainable development}}
* [[Coal gasification]]
* [[Fluidized bed combustion]]
* [[History of manufactured gas]]
* [[Isle of Wight gasification facility]]
* [[List of solid waste treatment technologies]]
* [[Plasma arc waste disposal]]
* [[Renewable natural gas]]
* [[Water gas]]
 
==References==
{{Reflist|2}}
 
==External links==
{{Wiktionary}}
* [http://www.juniper.co.uk/services/Our_services/P&GFactsheet.html Pyrolysis and Gasification Factsheet] by Juniper
* [http://cgpl.iisc.ernet.in "Gasification Technology" Experts from CGPL, Indian Institute of Science]
* [http://www.gasification.org "Gasification Technologies Council"]
* [http://www.ieatask33.org "Thermal Gasification of Biomass, International Energy Agency"]
* [http://www.biomassenergy.gr/en/articles/technology/gasification Gasification Technology]
{{fuel gas}}
[[Category:Energy conversion]]
[[Category:Power station technology]]
[[Category:Thermal treatment]]
[[Category:Waste treatment technology]]
[[Category:Fuel gas]]
[[Category:Gas technologies]]
[[Category:Synthetic fuel technologies]]
[[Category:Sustainable technologies]]
[[Category:Pyrolysis]]

Revision as of 15:59, 11 December 2013

29 yr old Orthopaedic Surgeon Grippo from Saint-Paul, spends time with interests including model railways, top property developers in singapore developers in singapore and dolls. Finished a cruise ship experience that included passing by Runic Stones and Church. Template:Sustainable energy

Gasification is a process that converts organic or fossil based carbonaceous materials into carbon monoxide, hydrogen and carbon dioxide. This is achieved by reacting the material at high temperatures (>700 °C), without combustion, with a controlled amount of oxygen and/or steam. The resulting gas mixture is called syngas (from synthesis gas or synthetic gas) or producer gas and is itself a fuel. The power derived from gasification and combustion of the resultant gas is considered to be a source of renewable energy if the gasified compounds were obtained from biomass.[1][2][3][4]

The advantage of gasification is that using the syngas is potentially more efficient than direct combustion of the original fuel because it can be combusted at higher temperatures or even in fuel cells, so that the thermodynamic upper limit to the efficiency defined by Carnot's rule is higher or not applicable. Syngas may be burned directly in gas engines, used to produce methanol and hydrogen, or converted via the Fischer–Tropsch process into synthetic fuel. Gasification can also begin with material which would otherwise have been disposed of such as biodegradable waste. In addition, the high-temperature process refines out corrosive ash elements such as chloride and potassium, allowing clean gas production from otherwise problematic fuels. Gasification of fossil fuels is currently widely used on industrial scales to generate electricity.[5]

History

Adler Diplomat 3 with gas generator (1941)

The process of producing energy using the gasification method has been in use for more than 180 years. During that time coal and peat were used to power these plants. Initially developed to produce town gas for lighting & cooking in 1800s, this was replaced by electricity and natural gas, it was also used in blast furnaces but the bigger role was played in the production of synthetic chemicals where it has been in use since the 1920s.

During both world wars especially the Second World War the need of gasification produced fuel reemerged due to the shortage of petroleum.[6] Wood gas generators, called Gasogene or Gazogène, were used to power motor vehicles in Europe. By 1945 there were trucks, buses and agricultural machines that were powered by gasification. It is estimated that there were close to 9,000,000 vehicles running on producer gas all over the world.

Chemical reactions

In a gasifier, the carbonaceous material undergoes several different processes:

Pyrolysis of carbonaceous fuels
Gasification of char
  1. The dehydration or drying process occurs at around 100°C. Typically the resulting steam is mixed into the gas flow and may be involved with subsequent chemical reactions, notably the water-gas reaction if the temperature is sufficiently high enough (see step #5).
  2. The pyrolysis (or devolatilization) process occurs at around 200-300°C. Volatiles are released and char is produced, resulting in up to 70% weight loss for coal. The process is dependent on the properties of the carbonaceous material and determines the structure and composition of the char, which will then undergo gasification reactions.
  3. The combustion process occurs as the volatile products and some of the char reacts with oxygen to primarily form carbon dioxide and small amounts of carbon monoxide, which provides heat for the subsequent gasification reactions. Letting C represent a carbon-containing organic compound, the basic reaction here is
  4. The gasification process occurs as the char reacts with carbon and steam to produce carbon monoxide and hydrogen, via the reaction
  5. In addition, the reversible gas phase water-gas shift reaction reaches equilibrium very fast at the temperatures in a gasifier. This balances the concentrations of carbon monoxide, steam, carbon dioxide and hydrogen.

In essence, a limited amount of oxygen or air is introduced into the reactor to allow some of the organic material to be "burned" to produce carbon dioxide and energy, which drives a second reaction that converts further organic material to hydrogen and additional carbon dioxide. Further reactions occur when the formed carbon monoxide and residual water from the organic material react to form methane and excess carbon dioxide (4 CO + 2 H2O --> CH4 + 3 CO2). This third reaction occurs more abundantly in reactors that increase the residence time of the reactive gases and organic materials, as well as heat and pressure. Catalysts are used in more sophisticated reactors to improve reaction rates, thus moving the system closer to the reaction equilibrium for a fixed residence time.

Gasification processes

Several types of gasifiers are currently available for commercial use: counter-current fixed bed, co-current fixed bed, fluidized bed, entrained flow, plasma, and free radical.[1][7][8][9]

Counter-current fixed bed ("up draft") gasifier

A fixed bed of carbonaceous fuel (e.g. coal or biomass) through which the "gasification agent" (steam, oxygen and/or air) flows in counter-current configuration.[10] The ash is either removed in the dry condition or as a slag. The slagging gasifiers have a lower ratio of steam to carbon,[11] achieving temperatures higher than the ash fusion temperature. The nature of the gasifier means that the fuel must have high mechanical strength and must ideally be non-caking so that it will form a permeable bed, although recent developments have reduced these restrictions to some extent. The throughput for this type of gasifier is relatively low. Thermal efficiency is high as the temperatures in the gas exit are relatively low. However, this means that tar and methane production is significant at typical operation temperatures, so product gas must be extensively cleaned before use. The tar can be recycled to the reactor.

In the gasification of fine, undensified biomass such as rice hulls, it is necessary to blow air into the reactor by means of a fan. This creates very high gasification temperature, as high as 1000 C. Above the gasification zone, a bed of fine and hot char is formed, and as the gas is blow forced through this bed, most complex hydrocarbons are broken down into simple components of hydrogen and carbon monoxide.Potter or Ceramic Artist Truman Bedell from Rexton, has interests which include ceramics, best property developers in singapore developers in singapore and scrabble. Was especially enthused after visiting Alejandro de Humboldt National Park.

Co-current fixed bed ("down draft") gasifier

Similar to the counter-current type, but the gasification agent gas flows in co-current configuration with the fuel (downwards, hence the name "down draft gasifier"). Heat needs to be added to the upper part of the bed, either by combusting small amounts of the fuel or from external heat sources. The produced gas leaves the gasifier at a high temperature, and most of this heat is often transferred to the gasification agent added in the top of the bed, resulting in an energy efficiency on level with the counter-current type. Since all tars must pass through a hot bed of char in this configuration, tar levels are much lower than the counter-current type.

Fluidized bed reactor

The fuel is fluidized in oxygen and steam or air. The ash is removed dry or as heavy agglomerates that defluidize. The temperatures are relatively low in dry ash gasifiers, so the fuel must be highly reactive; low-grade coals are particularly suitable. The agglomerating gasifiers have slightly higher temperatures, and are suitable for higher rank coals. Fuel throughput is higher than for the fixed bed, but not as high as for the entrained flow gasifier. The conversion efficiency can be rather low due to elutriation of carbonaceous material. Recycle or subsequent combustion of solids can be used to increase conversion. Fluidized bed gasifiers are most useful for fuels that form highly corrosive ash that would damage the walls of slagging gasifiers. Biomass fuels generally contain high levels of corrosive ash.

Entrained flow gasifier

A dry pulverized solid, an atomized liquid fuel or a fuel slurry is gasified with oxygen (much less frequent: air) in co-current flow. The gasification reactions take place in a dense cloud of very fine particles. Most coals are suitable for this type of gasifier because of the high operating temperatures and because the coal particles are well separated from one another.

The high temperatures and pressures also mean that a higher throughput can be achieved, however thermal efficiency is somewhat lower as the gas must be cooled before it can be cleaned with existing technology. The high temperatures also mean that tar and methane are not present in the product gas; however the oxygen requirement is higher than for the other types of gasifiers. All entrained flow gasifiers remove the major part of the ash as a slag as the operating temperature is well above the ash fusion temperature.

A smaller fraction of the ash is produced either as a very fine dry fly ash or as a black colored fly ash slurry. Some fuels, in particular certain types of biomasses, can form slag that is corrosive for ceramic inner walls that serve to protect the gasifier outer wall. However some entrained flow type of gasifiers do not possess a ceramic inner wall but have an inner water or steam cooled wall covered with partially solidified slag. These types of gasifiers do not suffer from corrosive slags.

Some fuels have ashes with very high ash fusion temperatures. In this case mostly limestone is mixed with the fuel prior to gasification. Addition of a little limestone will usually suffice for the lowering the fusion temperatures. The fuel particles must be much smaller than for other types of gasifiers. This means the fuel must be pulverized, which requires somewhat more energy than for the other types of gasifiers. By far the most energy consumption related to entrained flow gasification is not the milling of the fuel but the production of oxygen used for the gasification.

Plasma gasifier

In a plasma gasifier a high-voltage current is fed to a torch, creating a high-temperature arc. The inorganic residue is retrieved as a glass-like substance.

Feedstock

There are a large number of different feedstock types for use in a gasifier, each with different characteristics, including size, shape, bulk density, moisture content, energy content, chemical composition, ash fusion characteristics, and homogeneity of all these properties. Coal and petroleum coke are used as primary feedstocks for many large gasification plants worldwide. Additionally, a variety of biomass and waste-derived feedstocks can be gasified, with wood pellets and chips, waste wood, plastics and aluminium, Municipal Solid Waste (MSW), Refuse-derived fuel (RDF), agricultural and industrial wastes, sewage sludge, switch grass, discarded seed corn, corn stover and other crop residues all being used.[1]

Chemrec has developed a process for gasification of black liquor.[12]

Waste disposal

HTCW reactor, one of several proposed waste gasification processes. According to the sales and sales management consultants KBI Group a pilot plant in Arnstadt implementing this process has completed initial tests.[13]

Waste gasification has several advantages over incineration:

  • The necessary extensive flue gas cleaning may be performed on the syngas instead of the much larger volume of flue gas after combustion.
  • Electric power may be generated in engines and gas turbines, which are much cheaper and more efficient than the steam cycle used in incineration. Even fuel cells may potentially be used, but these have rather severe requirements regarding the purity of the gas.
  • Chemical processing (Gas to liquids) of the syngas may produce other synthetic fuels instead of electricity.
  • Some gasification processes treat ash containing heavy metals at very high temperatures so that it is released in a glassy and chemically stable form.

A major challenge for waste gasification technologies is to reach an acceptable (positive) gross electric efficiency. The high efficiency of converting syngas to electric power is counteracted by significant power consumption in the waste preprocessing, the consumption of large amounts of pure oxygen (which is often used as gasification agent), and gas cleaning. Another challenge becoming apparent when implementing the processes in real life is to obtain long service intervals in the plants, so that it is not necessary to close down the plant every few months for cleaning the reactor.

Environmental advocates have called gasification "incineration in disguise" and argue that the technology is still dangerous to air quality and public health. "Since 2003 numerous proposals for waste treatment facilities hoping to use... gasification technologies failed to receive final approval to operate when the claims of project proponents did not withstand public and governmental scrutiny of key claims," according to the Global Alliance for Incinerator Alternatives.[14] One facility which operated from 2009-2011 in Ottawa had 29 "emissions incidents" and 13 "spills" over those three years. It was also only able to operate roughly 25% of the time.[15]

Several waste gasification processes have been proposed, but few have yet been built and tested, and only a handful have been implemented as plants processing real waste, and most of the time in combination with fossil fuels.[16]

One plant (in Chiba, Japan using the Thermoselect process[17]) has been processing industrial waste since year 2000, but has not yet documented positive net energy production from the process.

In the USA, gasification of waste is expanding across the country. Ze-gen is operating a waste gasification demonstration facility in New Bedford, Massachusetts. The facility was designed to demonstrate gasification of specific non-MSW waste streams using liquid metal gasification.[18] This facility came after widespread public opposition shelved plans for a similar plant in Attleboro, Massachusetts.[19] In addition, construction of a biomass gasification plant was approved in DeKalb County, Georgia on June 14, 2011.

Also in the USA, plasma is being used to gasify municipal solid waste, hazardous waste and biomedical waste at the Hurlburt Field Florida Special Operations Command Air Force base. PyroGenesis Canada Inc. is the technology provider.[20][21]

Current applications

Syngas can be used for heat production and for generation of mechanical and electrical power. Like other gaseous fuels, producer gas gives greater control over power levels when compared to solid fuels, leading to more efficient and cleaner operation.

Syngas can also be used for further processing to liquid fuels or chemicals.

Heat

Gasifiers offer a flexible option for thermal applications, as they can be retrofitted into existing gas fueled devices such as ovens, furnaces, boilers, etc., where syngas may replace fossil fuels. Heating values of syngas are generally around 4-10 MJ/m3.

Electricity

Industrial-scale gasification is currently mostly used to produce electricity from fossil fuels such as coal, where the syngas is burned in a gas turbine. Gasification is also used industrially in the production of electricity, ammonia and liquid fuels (oil) using Integrated Gasification Combined Cycles (IGCC), with the possibility of producing methane and hydrogen for fuel cells. IGCC is also a more efficient method of CO2 capture as compared to conventional technologies. IGCC demonstration plants have been operating since the early 1970s and some of the plants constructed in the 1990s are now entering commercial service.

Combined heat and power

In small business and building applications, where the wood source is sustainable, 250-1000 kWe and new zero carbon biomass gasification plants have been installed in Europe that produce tar free syngas from wood and burn it in reciprocating engines connected to a generator with heat recovery. This type of plant is often referred to as a wood biomass CHP unit but is a plant with seven different processes: biomass processing, fuel delivery, gasification, gas cleaning, waste disposal, electricity generation and heat recovery.[22]

Transport fuel

Diesel engines can be operated on dual fuel mode using producer gas. Diesel substitution of over 80% at high loads and 70-80% under normal load variations can easily be achieved.[23] Spark ignition engines and SOFC fuel cells can operate on 100% gasification gas.[24][25][26] Mechanical energy from the engines may be used for e.g. driving water pumps for irrigation or for coupling with an alternator for electrical power generation.

While small scale gasifiers have existed for well over 100 years, there have been few sources to obtain a ready to use machine. Small scale devices are typically DIY projects. However, currently in the United States, several companies offer gasifiers to operate small engines. In 2009 21stCenturyMotorworks claimed to have developed gasification technology in a prototype pickup truck that could use any biomass materials for fuel,[27] the vehicle was displayed at multiple events including the 2009 Boston Greenfest.

Renewable energy and fuels

Gasification plant Güssing, Austria (2006)

In principle, gasification can proceed from just about any organic material, including biomass and plastic waste. The resulting syngas can be combusted. Alternatively, if the syngas is clean enough, it may be used for power production in gas engines, gas turbines or even fuel cells, or converted efficiently to dimethyl ether (DME) by methanol dehydration, methane via the Sabatier reaction, or diesel-like synthetic fuel via the Fischer–Tropsch process. In many gasification processes most of the inorganic components of the input material, such as metals and minerals, are retained in the ash. In some gasification processes (slagging gasification) this ash has the form of a glassy solid with low leaching properties, but the net power production in slagging gasification is low (sometimes negative) and costs are higher.

Regardless of the final fuel form, gasification itself and subsequent processing neither directly emits nor traps greenhouse gases such as carbon dioxide. Power consumption in the gasification and syngas conversion processes may be significant though, and may indirectly cause CO2 emissions; in slagging and plasma gasification, the electricity consumption may even exceed any power production from the syngas.

Combustion of syngas or derived fuels emits exactly the same amount of carbon dioxide as would have been emitted from direct combustion of the initial fuel.To succeed in selling a home, it is advisable be competent in real estate advertising and marketing, authorized, monetary, operational aspects, and other information and skills. This is essential as a result of you want to negotiate with more and more sophisticated buyers. You could outperform rivals, use latest technologies, and stay ahead of the fast altering market.

Home is where the center is, and choosing the right house is a part of guaranteeing a contented expertise in Singapore. Most expats sign up for a two-year lease with the option to resume, so it is value taking the time to choose a neighbourhood that has the services you want. The experts at Expat Realtor have compiled the next data that will help you negotiate your means by way of the property minefield. Some government state properties for rent. Over 2000 units available for lease however occupancy is often excessive. Some properties come under a bidding system. Their property brokers embody DTZ and United Premas. Up to date serviced residences located just off Orchard Highway. one hundred sixty Orchard Highway, #06-01 Orchard Level, Singapore 238842. Institute Of Property Agents

There is no such thing as a deal too small. Property agents who're willing to find time for any deal even when the commission is small are those you want in your side. They also show humbleness and might relate with the average Singaporean higher. Relentlessly pursuing any deal, calling prospects even without being prompted. Even when they get rejected a hundred times, they still come back for more. These are the property brokers who will find consumers what they want finally, and who would be the most profitable in what they do. four. Honesty and Integrity

As a realtor, you're our own business. Due to this fact, it is imperative that you handle yours prices and spend money correctly in order to market your property successfully. Also, beware of mentors who always ask you to pay for pointless costs. Such mentors typically are recruiting to develop a staff and see you as a option to defray advertising and marketing prices. For foreigners who want to register with CEA as salespersons, they might want to have a valid Employment Cross (EP) issued by the Ministry of Manpower (MOM). They should consult an property agent that is ready to assist their future registration software, who would then examine with CEA. Thereafter, after they register for the RES Course, they might want to produce a letter of assist from the property agent."

Main Real Property Brokers with in depth local knowledge, Carole Ann, Elizabeth and their group of extremely skilled property consultants provide a personalised service, for those looking to buy, lease or promote in Singapore. Relocation companies out there. Properties for the aesthete. Boutique real property agency for architecturally distinguished, unique properties for rent and on the market. Caters to the niche market of design-savvy people. Sale, letting and property management and taxation services. three Shenton Means, #10-08 Shenton Home, Singapore 068805. Buy property, promote or leasing estate company. 430 Lorong 6 Toa Payoh, #08-01 OrangeTee Constructing, Singapore 319402. HIGH Date / Age of property Estate Agents and Home Search Services Property Information Highlights Prime Achievers

From the above info, you may see that saving on agent's commission will not cover the expenses wanted to market your home efficiently. As well as, it's essential make investments a whole lot of time, vitality and effort. By taking yourself away from your work and other endeavors, additionally, you will incur unnecessary opportunity prices. There may be additionally no assurance you could beat the market and get the outcomes you need. That is why you want an agent - not simply an ordinary agent - you want knowledgeable and competent specialist, geared up with the best instruments and knowledge to serve you and lead you to success! Within the midst of this ‘uniquely Singapore' Property GSS, our most needed foreign customers are nowhere to be seen. Different types of Public Residential properties

Based on Kelvin, other agents may also make use of your agent's listings. "If your pricing is on the excessive aspect, these brokers may use your house to persuade their patrons why Http://Trafficstooges.Com/Singapore-Property-Condominium they should purchase another residence." To counter this, Kelvin says it is crucial for your agent to supply a current market analysis before putting up your private home for sale. "This helps you worth your property appropriately and realistically." When property is made accessible (HIGH is issued) to the client. Becoming a successful property agent is a distinct story altogether! Hi, I would like to ask how I might be a property agent and whether there are courses I might take. And if I need to be at a certain age. www. Property BUYER com.sg (your impartial Mortgage Advisor) In private properties in Biomass gasification and combustion could play a significant role in a renewable energy economy, because biomass production removes the same amount of CO2 from the atmosphere as is emitted from gasification and combustion.To succeed in selling a home, it is advisable be competent in real estate advertising and marketing, authorized, monetary, operational aspects, and other information and skills. This is essential as a result of you want to negotiate with more and more sophisticated buyers. You could outperform rivals, use latest technologies, and stay ahead of the fast altering market.

Home is where the center is, and choosing the right house is a part of guaranteeing a contented expertise in Singapore. Most expats sign up for a two-year lease with the option to resume, so it is value taking the time to choose a neighbourhood that has the services you want. The experts at Expat Realtor have compiled the next data that will help you negotiate your means by way of the property minefield. Some government state properties for rent. Over 2000 units available for lease however occupancy is often excessive. Some properties come under a bidding system. Their property brokers embody DTZ and United Premas. Up to date serviced residences located just off Orchard Highway. one hundred sixty Orchard Highway, #06-01 Orchard Level, Singapore 238842. Institute Of Property Agents

There is no such thing as a deal too small. Property agents who're willing to find time for any deal even when the commission is small are those you want in your side. They also show humbleness and might relate with the average Singaporean higher. Relentlessly pursuing any deal, calling prospects even without being prompted. Even when they get rejected a hundred times, they still come back for more. These are the property brokers who will find consumers what they want finally, and who would be the most profitable in what they do. four. Honesty and Integrity

As a realtor, you're our own business. Due to this fact, it is imperative that you handle yours prices and spend money correctly in order to market your property successfully. Also, beware of mentors who always ask you to pay for pointless costs. Such mentors typically are recruiting to develop a staff and see you as a option to defray advertising and marketing prices. For foreigners who want to register with CEA as salespersons, they might want to have a valid Employment Cross (EP) issued by the Ministry of Manpower (MOM). They should consult an property agent that is ready to assist their future registration software, who would then examine with CEA. Thereafter, after they register for the RES Course, they might want to produce a letter of assist from the property agent."

Main Real Property Brokers with in depth local knowledge, Carole Ann, Elizabeth and their group of extremely skilled property consultants provide a personalised service, for those looking to buy, lease or promote in Singapore. Relocation companies out there. Properties for the aesthete. Boutique real property agency for architecturally distinguished, unique properties for rent and on the market. Caters to the niche market of design-savvy people. Sale, letting and property management and taxation services. three Shenton Means, #10-08 Shenton Home, Singapore 068805. Buy property, promote or leasing estate company. 430 Lorong 6 Toa Payoh, #08-01 OrangeTee Constructing, Singapore 319402. HIGH Date / Age of property Estate Agents and Home Search Services Property Information Highlights Prime Achievers

From the above info, you may see that saving on agent's commission will not cover the expenses wanted to market your home efficiently. As well as, it's essential make investments a whole lot of time, vitality and effort. By taking yourself away from your work and other endeavors, additionally, you will incur unnecessary opportunity prices. There may be additionally no assurance you could beat the market and get the outcomes you need. That is why you want an agent - not simply an ordinary agent - you want knowledgeable and competent specialist, geared up with the best instruments and knowledge to serve you and lead you to success! Within the midst of this ‘uniquely Singapore' Property GSS, our most needed foreign customers are nowhere to be seen. Different types of Public Residential properties

Based on Kelvin, other agents may also make use of your agent's listings. "If your pricing is on the excessive aspect, these brokers may use your house to persuade their patrons why Http://Trafficstooges.Com/Singapore-Property-Condominium they should purchase another residence." To counter this, Kelvin says it is crucial for your agent to supply a current market analysis before putting up your private home for sale. "This helps you worth your property appropriately and realistically." When property is made accessible (HIGH is issued) to the client. Becoming a successful property agent is a distinct story altogether! Hi, I would like to ask how I might be a property agent and whether there are courses I might take. And if I need to be at a certain age. www. Property BUYER com.sg (your impartial Mortgage Advisor) In private properties in While other biofuel technologies such as biogas and biodiesel are carbon neutral, gasification in principle may run on a wider variety of input materials and can be used to produce a wider variety of output fuels.

There are at present a few industrial scale biomass gasification plants. Since 2008 in Svenljunga, Sweden, a biomass gasification plant generates up to 14 MWth, supplying industries and citizens of Svenljunga with process steam and district heating, respectively. The gasifier uses biomass fuels such as CCA or creosote impregnated waste wood and other kinds of recycled wood to produces syngas that is combusted on site.[28][29] In 2011 a similar gasifier, using the same kinds of fuels, is being installed at Munkfors Energy's CHP plant. The CHP plant will generate 2 MWe (electricity) and 8 MWth (district heating).[30][31]

Examples of demonstration projects include:

  • Those of the Renewable Energy Network Austria,[32] including a plant using dual fluidized bed gasification that has supplied the town of Güssing with 2 MW of electricity, produced utilising GE Jenbacher reciprocating gas engines[33][34] and 4 MW of heat,[35] generated from wood chips, since 2003.
  • Chemrec's pilot plant in Piteå that has produced 3 MW of clean syngas since 2006, generated from entrained flow gasification of black liquor.[12]
  • The US Air Force Transportable Plasma Waste to Energy System (TPWES) facility at Hurlburt Field, Florida.[20]

See also

Sportspersons Hyslop from Nicolet, usually spends time with pastimes for example martial arts, property developers condominium in singapore singapore and hot rods. Maintains a trip site and has lots to write about after touring Gulf of Porto: Calanche of Piana.

References

43 year old Petroleum Engineer Harry from Deep River, usually spends time with hobbies and interests like renting movies, property developers in singapore new condominium and vehicle racing. Constantly enjoys going to destinations like Camino Real de Tierra Adentro.

External links

Property Brokers and Team Managers – Looking for good Actual Estate Agency to join or contemplating which is the Finest Property Agency to join in Singapore? Join Leon Low in OrangeTee Singapore! In OrangeTee, we've much more attractive commission structure than before, enrichment courses, 10 most vital components to hitch OrangeTee and 1 motive to join Leon Low and his Workforce. 1. Conducive working environment

Via PropNex International, we continually construct on our fame in the international property enviornment. Click here for more of our abroad initiatives. Instances have modified. We don't see those unlawful hawkers anymore. Instead, nicely dressed property brokers were seen reaching out to people visiting the market in the morning. Real estate can be a lonely enterprise and it is straightforward to really feel demoralised, especially when there are no enquiries despite your greatest effort in advertising your shopper's property. That is the place having the fitting assist from fellow associates is essential. Our firm offers administration services for condominiums and apartments. With a crew of qualified folks, we assist to make your estate a nicer place to stay in. HDB Flat for Hire 2 Rooms

Achievers are all the time the first to check new technologies & providers that can help them enhance their sales. When property guru first began, many brokers didn't consider in it until they began listening to other colleagues getting unbelievable outcomes. Most brokers needs to see proof first, before they dare to take the first step in attempting. These are often the late comers or late adopters. There is a purpose why top achievers are heading the wave or heading the best way. Just because they try new properties in singapore issues ahead of others. The rest just observe after!

Firstly, a Fraudulent Misrepresentation is one that is made knowingly by the Representor that it was false or if it was made without belief in its fact or made recklessly without concerning whether or not it is true or false. For instance estate agent A told the potential consumers that the tenure of a landed property they are considering is freehold when it is really one with a ninety nine-yr leasehold! A is responsible of constructing a fraudulent misrepresentation if he is aware of that the tenure is the truth is a ninety nine-yr leasehold instead of it being freehold or he didn't consider that the tenure of the house was freehold or he had made the assertion with out caring whether or not the tenure of the topic property is in fact freehold.

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GPS has assembled a high workforce of personnel who are additionally well-known figures in the native actual property scene to pioneer this up-and-coming organization. At GPS Alliance, WE LEAD THE WAY! Many people have asked me how I managed to earn S$114,000 from my sales job (my third job) at age 24. The reply is easy. After graduation from NUS with a Historical past diploma, my first job was in actual estate. Within the ultimate part of this series, I interview one of the top agents in ERA Horizon Group and share with you the secrets to his success! Learn it RIGHT HERE

Notice that the application must be submitted by the appointed Key Government Officer (KEO) such as the CEO, COO, or MD. Once the KEO has submitted the mandatory paperwork and assuming all documents are in order, an email notification shall be sent stating that the applying is permitted. No hardcopy of the license might be issued. A delicate-copy could be downloaded and printed by logging into the CEA website. It takes roughly four-6 weeks to course of an utility.

Template:Fuel gas

  1. 1.0 1.1 1.2 National Non-Food Crops Centre. "Review of Technologies for Gasification of Biomass and Wastes, NNFCC 09-008", Retrieved on 2011-06-24
  2. The Clean and Renewable Energy Source, www.biomass.uk.com, accessed 16.05.11
  3. Thermal Gasification of Biomass, International Energy Agency Task 33, www.gastechnology.org, accessed 16.05.11
  4. Clean Renewable Fuel from the Plasma Gasification of Waste, www.waste-management-world.com, Accessed 16.05.2011
  5. Chris Higman and Maarten van der Burgt. Gasification, Second Edition, Elsevier (2008).
  6. Gas Generator Project History of the Gasogene technology
  7. Beychok, M.R., Process and environmental technology for producing SNG and liquid fuels, U.S. EPA report EPA-660/2-75-011, May 1975
  8. Beychok, M.R., Coal gasification for clean energy, Energy Pipelines and Systems, March 1974
  9. Beychok, M.R., Coal gasification and the Phenosolvan process, American Chemical Society 168th National Meeting, Atlantic City, September 1974
  10. Thanapal SS, Annamalai K, Sweeten J, Gordillo G, (2011), “Fixed bed gasification of dairy biomass with enriched air mixture”. Appl Energy, doi:10.1016/j.apenergy.2011.11.072
  11. 55 years old Systems Administrator Antony from Clarence Creek, really loves learning, PC Software and aerobics. Likes to travel and was inspired after making a journey to Historic Ensemble of the Potala Palace.

    You can view that web-site... ccleaner free download
  12. 12.0 12.1 Chemrec web site
  13. HTCW commercial web page
  14. GAIA Report
  15. Plasco Energy Group Demonstration Project Final Report
  16. Gasification case studies by the Environment Agency of England and Wales
  17. Thermoselect website — A waste gasification plant supplier
  18. Template:Cite news
  19. Template:Cite web
  20. 20.0 20.1 Template:Cite web
  21. One of the biggest reasons investing in a Singapore new launch is an effective things is as a result of it is doable to be lent massive quantities of money at very low interest rates that you should utilize to purchase it. Then, if property values continue to go up, then you'll get a really high return on funding (ROI). Simply make sure you purchase one of the higher properties, reminiscent of the ones at Fernvale the Riverbank or any Singapore landed property Get Earnings by means of Renting

    In its statement, the singapore property listing - website link, government claimed that the majority citizens buying their first residence won't be hurt by the new measures. Some concessions can even be prolonged to chose teams of consumers, similar to married couples with a minimum of one Singaporean partner who are purchasing their second property so long as they intend to promote their first residential property. Lower the LTV limit on housing loans granted by monetary establishments regulated by MAS from 70% to 60% for property purchasers who are individuals with a number of outstanding housing loans on the time of the brand new housing purchase. Singapore Property Measures - 30 August 2010 The most popular seek for the number of bedrooms in Singapore is 4, followed by 2 and three. Lush Acres EC @ Sengkang

    Discover out more about real estate funding in the area, together with info on international funding incentives and property possession. Many Singaporeans have been investing in property across the causeway in recent years, attracted by comparatively low prices. However, those who need to exit their investments quickly are likely to face significant challenges when trying to sell their property – and could finally be stuck with a property they can't sell. Career improvement programmes, in-house valuation, auctions and administrative help, venture advertising and marketing, skilled talks and traisning are continuously planned for the sales associates to help them obtain better outcomes for his or her shoppers while at Knight Frank Singapore. No change Present Rules

    Extending the tax exemption would help. The exemption, which may be as a lot as $2 million per family, covers individuals who negotiate a principal reduction on their existing mortgage, sell their house short (i.e., for lower than the excellent loans), or take part in a foreclosure course of. An extension of theexemption would seem like a common-sense means to assist stabilize the housing market, but the political turmoil around the fiscal-cliff negotiations means widespread sense could not win out. Home Minority Chief Nancy Pelosi (D-Calif.) believes that the mortgage relief provision will be on the table during the grand-cut price talks, in response to communications director Nadeam Elshami. Buying or promoting of blue mild bulbs is unlawful.

    A vendor's stamp duty has been launched on industrial property for the primary time, at rates ranging from 5 per cent to 15 per cent. The Authorities might be trying to reassure the market that they aren't in opposition to foreigners and PRs investing in Singapore's property market. They imposed these measures because of extenuating components available in the market." The sale of new dual-key EC models will even be restricted to multi-generational households only. The models have two separate entrances, permitting grandparents, for example, to dwell separately. The vendor's stamp obligation takes effect right this moment and applies to industrial property and plots which might be offered inside three years of the date of buy. JLL named Best Performing Property Brand for second year running

    The data offered is for normal info purposes only and isn't supposed to be personalised investment or monetary advice. Motley Fool Singapore contributor Stanley Lim would not personal shares in any corporations talked about. Singapore private home costs increased by 1.eight% within the fourth quarter of 2012, up from 0.6% within the earlier quarter. Resale prices of government-built HDB residences which are usually bought by Singaporeans, elevated by 2.5%, quarter on quarter, the quickest acquire in five quarters. And industrial property, prices are actually double the levels of three years ago. No withholding tax in the event you sell your property. All your local information regarding vital HDB policies, condominium launches, land growth, commercial property and more

    There are various methods to go about discovering the precise property. Some local newspapers (together with the Straits Instances ) have categorised property sections and many local property brokers have websites. Now there are some specifics to consider when buying a 'new launch' rental. Intended use of the unit Every sale begins with 10 p.c low cost for finish of season sale; changes to 20 % discount storewide; follows by additional reduction of fiftyand ends with last discount of 70 % or extra. Typically there is even a warehouse sale or transferring out sale with huge mark-down of costs for stock clearance. Deborah Regulation from Expat Realtor shares her property market update, plus prime rental residences and houses at the moment available to lease Esparina EC @ Sengkang
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