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  Catalytic Partial Oxidation of Methane on Autothermally Operated Pt Catalysts: Reaction Pathways, Zoning Effects and Impact of Mass and Heat Transport

Korup, O., Geske, M., Mavlyankariev, S., Schlögl, R., & Horn, R. (2010). Catalytic Partial Oxidation of Methane on Autothermally Operated Pt Catalysts: Reaction Pathways, Zoning Effects and Impact of Mass and Heat Transport. In Prep. Pap.-Am. Chem. Soc., Div. Fuel Chem. (pp. 149-150).

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 Creators:
Korup, Oliver1, Author              
Geske, Michael1, Author              
Mavlyankariev, Sardor1, Author              
Schlögl, Robert1, Author              
Horn, Raimund1, Author              
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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 Abstract: Heterogeneously catalyzed gas phase oxidation reactions are often characterized by reaction temperatures of several hundred degrees centigrade. In particular for the oxidation of small alkanes, high temperatures are common either to activate the alkane or as a result from rapid heat production after reaction light-off. An example is the catalytic partial oxidation (CPO) of methane to synthesis gas on platinum at temperatures above 800 °C. Characteristic for high temperature oxidation catalysis is the strong influence of mass and heat transport as well as gas phase reactions above the catalyst surface. Because the number of intermolecular collisions increases with pressure, gas phase chemistry becomes generally more important at elevated pressures. Consequently, product yields and selectivities in high temperature oxidation catalysis are often the result of a complex network of reactions at the catalyst surface and in the surrounding gas phase which are coupled in a non-linear way by heat transport, mass transport and exchange of reactive intermediates (1). In a conventional catalytic reactor measurement inlet and outlet streams to and from the reactor are analyzed respectively. The reactor itself is usually treated as a black box and the pathways via which reactants are transformed into products remain hidden. Spatially resolved species, gas and surface temperature profiles measured through a catalyst bed under in-situ high temperature/high pressure conditions reveal details about the reaction pathways, e.g. zoning in the catalyst bed, the impact of transport limitations and the influence of gas phase chemistry, especially at elevated pressure.

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Language(s): eng - English
 Dates: 2010
 Publication Status: Published in print
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 Rev. Type: Internal
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Title: 240th ACS National Meeting
Place of Event: Boston, Massachusetts [USA]
Start-/End Date: 2010-08-22 - 2010-08-26

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Title: Prep. Pap.-Am. Chem. Soc., Div. Fuel Chem.
Source Genre: Proceedings
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Pages: - Volume / Issue: 55 (2) Sequence Number: - Start / End Page: 149 - 150 Identifier: -