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In situ IR/MS study of partial oxidation of CH4 coupled with pulse technique over Rh/Al2O3

Paper ID Volume ID Publish Year Pages File Format Full-Text
52133 46865 2008 8 PDF Available
Title
In situ IR/MS study of partial oxidation of CH4 coupled with pulse technique over Rh/Al2O3
Abstract

Partial oxidation of methane was studied by pulsing O2 into a CH4 flow over Rh/Al2O3 in a sequence of in situ infrared (IR) cell and fixed bed reactor at 773 K. The results obtained from the sequence of an IR cell followed by a fixed bed reactor show that (i) adsorbed CO produced possesses a long residence time, indicating that adsorbed oxygen leading to the formation of CO is significantly different from those leading to CO2 and (ii) CO2 is not an intermediate species for the formation of CO. The results obtained from the reversed reactor sequence show the water–gas shift reaction as the dominant pathway in the downstream of the catalyst bed. Pulsing oxygen into varying partial pressure of methane revealed that H2 oxidation is more sensitive to the partial pressure of the reactant than CO oxidation. In situ IR of pulse reaction coupled with alternating reactor sequence is an effective approach to study the primary and secondary reactions as well as the nature of their adsorbed species.

Keywords
Partial oxidation; Pulse reaction; Transient response; Reaction mechanism; Adsorbed CO; Rh
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 6, 31 March 2008, Pages 1235–1242
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us