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Power-law kinetics of methanol synthesis from carbon dioxide and hydrogen on copper–zinc oxide catalysts with alumina or zirconia supports

Paper ID Volume ID Publish Year Pages File Format Full-Text
53254 46957 2016 12 PDF Available
Title
Power-law kinetics of methanol synthesis from carbon dioxide and hydrogen on copper–zinc oxide catalysts with alumina or zirconia supports
Abstract

•Kinetics of two catalysts for methanol synthesis from CO2/H2 were assessed.•Power-law models describe both methanol synthesis and reverse water gas shift reaction.•Cu/ZnO/ZrO2 catalyst has better low temperature methanol selectivity than Cu/ZnO/Al2O3 catalyst.•Overstoichiometric H2 in the feed strongly enhances methanol selectivity.•8-parameter models accurately fit the data with an average error below 10%.

Kinetics of methanol synthesis from carbon dioxide and hydrogen were studied on two catalysts, a copper–zinc oxide–alumina catalyst (CuZA) and a copper–zinc oxide–zirconia (CuZZ) catalyst. Although both catalysts show similar turnover frequencies for the methanol synthesis reaction, CuZZ is more selective for methanol synthesis because the reverse water gas shift reaction occurs more slowly on this catalyst. The results of the catalytic tests were modeled with power-law equations which highlight the strong positive impact of hydrogen partial pressure on methanol synthesis activity and selectivity. The comparison of the experimental results with thermodynamic equilibrium allows separating thermodynamic and kinetic driving forces.

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Keywords
Methanol synthesis; Carbon dioxide hydrogenation; Kinetics; Copper catalyst; Zirconia; Alumina
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Power-law kinetics of methanol synthesis from carbon dioxide and hydrogen on copper–zinc oxide catalysts with alumina or zirconia supports
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 270, 15 July 2016, Pages 31–42
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us