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	<title>Hanner polytope - Revision history</title>
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	<updated>2026-05-21T22:36:20Z</updated>
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		<title>en&gt;David Eppstein: /* Helly property */ url for sz.-nagy</title>
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		<updated>2013-05-19T20:29:50Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Helly property: &lt;/span&gt; url for sz.-nagy&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{{Infobox person&lt;br /&gt;
| name = Octave Leopold Boudouard&lt;br /&gt;
| image =&lt;br /&gt;
| alt =&lt;br /&gt;
| caption =&lt;br /&gt;
| birth_name =&lt;br /&gt;
| birth_date = 1872&amp;lt;!-- {{Birth date and age|YYYY|MM|DD}} or {{Birth-date and age|Month DD, YYYY}} --&amp;gt;&lt;br /&gt;
| birth_place =&lt;br /&gt;
| death_date = 1923&amp;lt;!-- {{Death date and age|YYYY|MM|DD|YYYY|MM|DD}} or {{Death-date and age|Month DD, YYYY|Month DD, YYYY}} (death date then birth date) --&amp;gt;&lt;br /&gt;
| death_place =&lt;br /&gt;
| nationality =French&lt;br /&gt;
| other_names =&lt;br /&gt;
| occupation =Chemist&lt;br /&gt;
| known_for =[[Boudouard reaction]]&lt;br /&gt;
}}&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Octave Leopold Boudouard&amp;#039;&amp;#039;&amp;#039; (1872–1923) was a French chemist known for his 1905 discovery of the [[Boudouard reaction]].&lt;br /&gt;
&lt;br /&gt;
==Career==&lt;br /&gt;
Octave Leopold Boudouard became a professor at the [[Conservatoire National des Arts et Métiers]] in Paris. He worked in various fields of applied chemistry, such as the chemistry of fuels and clays. His most important work was his research into chemical equilibria when reducing iron oxides in a blast furnace.{{sfn|Boudouard, Octave-Léopold: Trecanni}} In 1901 he proposed the first theory of the hydrogenation of carbon monoxide, where he considered that metal oxide was reacting with carbon.{{sfn|Kemball|Dowden|1978|p=53}} In 1905 Boudouard identified the Boudouard reaction, where carbon and carbon dioxide combine to form carbon monoxide at high temperatures, while the reverse occurs at lower temperatures.{{sfn|Holleman|Wiber|Wiberg|2001|pp=810-811}} In 1912 he published a paper on the odors of Paris, researching the chemicals polluting the air of that city.{{sfn|Barnes|2006|p=300}}&lt;br /&gt;
&lt;br /&gt;
==Boudouard reaction==&lt;br /&gt;
{{main|Boudouard reaction}}&lt;br /&gt;
The Boudouard reaction is: &lt;br /&gt;
::2CO &amp;lt;math&amp;gt; \rightleftharpoons &amp;lt;/math&amp;gt; CO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; + C&lt;br /&gt;
Boudouard found that when an excess of coke reacts with air or metal oxides, below about 400°C this produces carbon dioxide and soot, while at temperatures above 1,000°C it produces carbon monoxide. Between these extremes a mixture of the carbon monoxide, carbon dioxide and soot is produced {{sfn|Holleman|Wiber|Wiberg|2001|pp=811}} Understanding the reaction is a significant factor in the design of blast furnaces where the goal is to maximize use of fuel while minimizing production of soot.{{sfn|Zeman|Lackner|2006}}&lt;br /&gt;
&lt;br /&gt;
==Bibliography==&lt;br /&gt;
*{{cite journal |last1=Le Chatelier |first1=H. |last2=Boudouard |first2=O. |year=1898&lt;br /&gt;
 |title=Limits of Flammability of Gaseous Mixtures |journal=[[Bulletin de la Société Chimique de France]] |location=Paris |volume=19 |pages=483–488}}&lt;br /&gt;
*{{cite book |title=Mesure des températures élevées |first1=H. |last=Le Chatelier |first2=O. |last2=Boudouard |year=1900&lt;br /&gt;
 |url=http://archive.org/details/mesuredestempr00lechuoft|location=Paris |publisher=G. Carré et C. Naud}}&lt;br /&gt;
*{{cite book|last1=Chatelier|first1=Henri Le|last2=Boudouard|first2=Octave|last3=Burgess|first3=George Kimball|title=High-temperature measurements|url=http://books.google.com/books?id=-2tKAAAAMAAJ|accessdate=2013-05-17|year=1912|publisher=Wiley}}&lt;br /&gt;
*{{cite book |title=Paul Schutzenberger et l&amp;#039;isotopie |first=O. |last=Boudouard |year=1922}}&lt;br /&gt;
&lt;br /&gt;
==References==&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Notes&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
{{notes}}&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Citations&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
{{reflist |colwidth=30em}}&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Sources&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
{{refbegin}}&lt;br /&gt;
*{{cite book|ref=harv&lt;br /&gt;
 |last=Barnes|first=David S.|title=The Great Stink of Paris and the Nineteenth-Century Struggle Against Filth and Germs&lt;br /&gt;
 |url=http://books.google.com/books?id=khptROSVZZoC&amp;amp;pg=PA300|accessdate=2013-05-17&lt;br /&gt;
 |date=2006-05-17|publisher=JHU Press|isbn=978-0-8018-8349-1}}&lt;br /&gt;
*{{cite book |ref={{harvid|Boudouard, Octave-Léopold: Trecanni}} |url=http://www.treccani.it/enciclopedia/octave-leopold-boudouard/&lt;br /&gt;
 |title=Boudouard, Octave-Léopold|work=Trecanni|accessdate=2013-05-17}}&lt;br /&gt;
*{{cite book|ref=harv&lt;br /&gt;
 |last1=Holleman|first1=Arnold F.|last2=Wiber|first2=Egon|last3=Wiberg|first3=Nils|title=Inorganic Chemistry&lt;br /&gt;
 |url=http://books.google.com/books?id=vEwj1WZKThEC&amp;amp;pg=PA810|accessdate=17 May 2013&lt;br /&gt;
 |year=2001|publisher=Academic Press|isbn=978-0-12-352651-9|page=810}} &lt;br /&gt;
*{{cite book|ref=harv&lt;br /&gt;
 |last1=Kemball|first1=Charles|last2=Dowden|first2=D. A.|title=Catalysis:|url=http://books.google.com/books?id=7LATFjkYF5QC&amp;amp;pg=PA53|accessdate=2013-05-17&lt;br /&gt;
 |date=1978-01-01|publisher=Royal Society of Chemistry|isbn=978-0-85186-544-7|page=53}}&lt;br /&gt;
*{{cite journal |ref=harv |url=http://wordpress.ei.columbia.edu/lenfest/files/2012/11/ZEMAN_LACKNER_2006.pdf |journal=Pollution Control |date=May 2006&lt;br /&gt;
 |last1=Zeman |first1=Frank S |last2=Lackner |first2=Klaus S |accessdate=2013-05-17|title=The Zero Emission Kiln}}&lt;br /&gt;
{{refend}}&lt;br /&gt;
&lt;br /&gt;
{{Persondata&lt;br /&gt;
| NAME              = Boudouard, Octave Leopold&lt;br /&gt;
| ALTERNATIVE NAMES =&lt;br /&gt;
| SHORT DESCRIPTION = French chemist&lt;br /&gt;
| DATE OF BIRTH     = 1872&lt;br /&gt;
| PLACE OF BIRTH    =&lt;br /&gt;
| DATE OF DEATH     = 1923&lt;br /&gt;
| PLACE OF DEATH    =&lt;br /&gt;
}}&lt;br /&gt;
{{DEFAULTSORT:Boudouard, Octave Leopold}}&lt;br /&gt;
[[Category:1872 births]]&lt;br /&gt;
[[Category:1923 deaths]]&lt;br /&gt;
[[Category:French chemists]]&lt;/div&gt;</summary>
		<author><name>en&gt;David Eppstein</name></author>
	</entry>
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