A comprehensive study on carbon dioxide reforming of methane over Ni/gamma-Al2O3 catalysts

Wang, S. B. and Lu, G. Q. (1999) A comprehensive study on carbon dioxide reforming of methane over Ni/gamma-Al2O3 catalysts. Industrial & Engineering Chemistry Research, 38 7: 2615-2625.


Author Wang, S. B.
Lu, G. Q.
Title A comprehensive study on carbon dioxide reforming of methane over Ni/gamma-Al2O3 catalysts
Journal name Industrial & Engineering Chemistry Research   Check publisher's open access policy
ISSN 0888-5885
Publication date 1999
Sub-type Article (original research)
DOI 10.1021/ie980489t
Volume 38
Issue 7
Start page 2615
End page 2625
Total pages 11
Place of publication USA
Publisher American Chemical Society
Collection year 1999
Language eng
Subject C1
250102 Chemistry of Catalysis
660200 Renewable Energy
Abstract Carbon dioxide reforming of methane into syngas over Ni/gamma-Al2O3 catalysts was systematically studied. Effects of reaction parameters on catalytic activity and carbon deposition over Ni/gamma-Al2O3 catalysts were investigated. It is found that reduced NiA1204, metal nickel, and active species of carbon deposited were the active sites for this reaction. Carbon deposition on Ni/gamma Al2O3 varied depending on the nickel loading and reaction temperature and is the major cause of catalyst deactivation. Higher nickel loading produced more coke on the catalysts, resulting in rapid deactivation and plugging of the reactor. At 5 wt % Ni/gamma-Al2O3 catalyst exhibited high activity and much lesser magnitude of deactivation in 140 h. Characterization of carbon deposits on the catalyst surface revealed that there are two kinds of carbon species (oxidized and -C-C-) formed during the reaction and they showed different reactivities toward hydrogenation and oxidation. Kinetic studies showed that the activation energy for CO production in this reaction amounted to 80 kJ/mol and the rate of CO production could be described by a Langmuir-Hinshelwood model.
Keyword Engineering, Chemical
Supported Nickel-catalysts
Synthesis Gas
Ni-catalysts
Mechanistic Aspects
Filamentous Carbon
Rhodium Catalysts
Co2
Ch4
Deactivation
Kinetics
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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