Methane combustion over La2O3-based catalysts and γ-Al2O3

Todd J. Toops; Arden B. Walters; M. Albert Vannice

doi:10.1016/S0926-860X(02)00146-1

Methane combustion over La₂O₃-based catalysts and γ-Al₂O₃

Todd J. Toops, Arden B. Walters, M. Albert Vannice

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

25 Scopus citations

Abstract

The kinetics of methane combustion were examined over La₂O₃, Sr-promoted La₂O₃, 40% La₂O₃/γ-Al₂O₃ and γ-Al₂O₃ between 773 and 973 K, 0.4-5 Torr CH₄ and 3-23 Torr O₂. The activation energy calculated for the elementary step to form a methyl group on the surface was found to be 40 kcal/mol for all the catalysts. The results showed that the heat of adsorption for methane was 20 kcal/mol CH₄ on all four catalyst, while for oxygen this value was 30 kcal/mol O₂ on the La₂O₃-based catalysts and near 20 kcal/mol O₂ on γ-Al₂O₃.

Original language	English
Pages (from-to)	125-140
Number of pages	16
Journal	Applied Catalysis A: General
Volume	233
Issue number	1-2
DOIs	https://doi.org/10.1016/S0926-860X(02)00146-1
State	Published - Jul 10 2002
Externally published	Yes

Funding

This study was sponsored by the National Science Foundation under Grant CTS-9633752.

Funders	Funder number
National Science Foundation	CTS-9633752

Keywords

CH combustion
Kinet ics
LaO
γ-AlO

Access to Document

10.1016/S0926-860X(02)00146-1

Cite this

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title = "Methane combustion over La2O3-based catalysts and γ-Al2O3",

abstract = "The kinetics of methane combustion were examined over La2O3, Sr-promoted La2O3, 40% La2O3/γ-Al2O3 and γ-Al2O3 between 773 and 973 K, 0.4-5 Torr CH4 and 3-23 Torr O2. The activation energy calculated for the elementary step to form a methyl group on the surface was found to be 40 kcal/mol for all the catalysts. The results showed that the heat of adsorption for methane was 20 kcal/mol CH4 on all four catalyst, while for oxygen this value was 30 kcal/mol O2 on the La2O3-based catalysts and near 20 kcal/mol O2 on γ-Al2O3.",

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author = "Toops, {Todd J.} and Walters, {Arden B.} and Vannice, {M. Albert}",

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T1 - Methane combustion over La2O3-based catalysts and γ-Al2O3

AU - Toops, Todd J.

AU - Walters, Arden B.

AU - Vannice, M. Albert

PY - 2002/7/10

Y1 - 2002/7/10

N2 - The kinetics of methane combustion were examined over La2O3, Sr-promoted La2O3, 40% La2O3/γ-Al2O3 and γ-Al2O3 between 773 and 973 K, 0.4-5 Torr CH4 and 3-23 Torr O2. The activation energy calculated for the elementary step to form a methyl group on the surface was found to be 40 kcal/mol for all the catalysts. The results showed that the heat of adsorption for methane was 20 kcal/mol CH4 on all four catalyst, while for oxygen this value was 30 kcal/mol O2 on the La2O3-based catalysts and near 20 kcal/mol O2 on γ-Al2O3.

AB - The kinetics of methane combustion were examined over La2O3, Sr-promoted La2O3, 40% La2O3/γ-Al2O3 and γ-Al2O3 between 773 and 973 K, 0.4-5 Torr CH4 and 3-23 Torr O2. The activation energy calculated for the elementary step to form a methyl group on the surface was found to be 40 kcal/mol for all the catalysts. The results showed that the heat of adsorption for methane was 20 kcal/mol CH4 on all four catalyst, while for oxygen this value was 30 kcal/mol O2 on the La2O3-based catalysts and near 20 kcal/mol O2 on γ-Al2O3.

KW - CH combustion

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