Surface Reaction Kinetics of the Oxidation and Reforming of CH4 over Rh/Al2O3 Catalysts

Canan Karakaya; Lubow Maier; Olaf Deutschmann

doi:10.1002/kin.20980

Surface Reaction Kinetics of the Oxidation and Reforming of CH₄ over Rh/Al₂O₃ Catalysts

Canan Karakaya, Lubow Maier, Olaf Deutschmann

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

An 48-step sur face reaction mechanism with thermodynamic consistent kinetic data is presented for the catalytic conversion of the gaseous chemical system H₂/O₂/H₂O/CO/CO₂/CH₄ over Rh/Al₂O₃ catalysts. Total and partial oxidation as well as steam reforming and dry reforming of methane over Rh catalysts is studied experimentally and numerically at varying temperature and composition. The results are used to extend the kinetic schemes we developed for H₂ oxidation, CO oxidation kinetics, and the water-gas-shift reactions in former studies. Aside from the experiments in a stagnation-flow reactor presented here, we modeled a number of experiments from the literature to test the newly established kinetic scheme.

Original language	English
Pages (from-to)	144-160
Number of pages	17
Journal	International Journal of Chemical Kinetics
Volume	48
Issue number	3
DOIs	https://doi.org/10.1002/kin.20980
State	Published - Mar 1 2016
Externally published	Yes

Funding

This work was supported by Deutsche Forschungsgemeinschaft (DFG). We gratefully acknowledge R. J. Kee (Colorado School of Mines) for collaboration during the reactor development and for fruitful discussions. A cost‐free academic license of DETCHEM™ by the Steinbeis GmbH & Co. KG für Technologietransfer (STZ 240 Reaktive Strömung) is gratefully acknowledged. We also thank S. Tischer and Hüseyin Karadeniz, both KIT, for their support with the computations. This work was supported by Deutsche Forschungsgemeinschaft (DFG). We gratefully acknowledge R. J. Kee (Colorado School of Mines) for collaboration during the reactor development and for fruitful discussions. A costfree academic license of DETCHEMTM by the Steinbeis GmbH & Co. KG für Technologietransfer (STZ 240 Reaktive Strömung) is gratefully acknowledged. We also thank S. Tischer and Hüseyin Karadeniz, both KIT, for their support with the computations.

Funders	Funder number
Steinbeis GmbH & Co
Colorado School of Mines
Deutsche Forschungsgemeinschaft

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10.1002/kin.20980

Cite this

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abstract = "An 48-step sur face reaction mechanism with thermodynamic consistent kinetic data is presented for the catalytic conversion of the gaseous chemical system H2/O2/H2O/CO/CO2/CH4 over Rh/Al2O3 catalysts. Total and partial oxidation as well as steam reforming and dry reforming of methane over Rh catalysts is studied experimentally and numerically at varying temperature and composition. The results are used to extend the kinetic schemes we developed for H2 oxidation, CO oxidation kinetics, and the water-gas-shift reactions in former studies. Aside from the experiments in a stagnation-flow reactor presented here, we modeled a number of experiments from the literature to test the newly established kinetic scheme.",

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