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Effect of H2/CO ratio and temperature on methane selectivity in the synthesis of ethanol on Rh-based catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
51748 46853 2008 4 PDF Available
Title
Effect of H2/CO ratio and temperature on methane selectivity in the synthesis of ethanol on Rh-based catalysts
Abstract

The hydrogenation of CO to form ethanol is thermodynamically limited if methane is allowed as a reaction product. The literature confirms this – selectivity to ethanol versus methane is limited even on Rh-based catalysts, which are the most selective for ethanol. Although it might be anticipated that increasing H2/CO ratio would favor methane, the kinetic studies in the literature, and our results reported here, show that the point selectivity for ethanol (S=rEtOH/rCH4)(S=rEtOH/rCH4) actually increases with increasing H2/CO ratio on Rh-based catalysts. This may be attributed to the increased hydrogenation of the surface acetaldehyde intermediate to ethanol.

Keywords
Ethanol; Methane; C2+ oxygenates; H2/CO ratio; Syngas; Biomass; Rhodium catalyst
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Effect of H2/CO ratio and temperature on methane selectivity in the synthesis of ethanol on Rh-based catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 14, 30 August 2008, Pages 2308–2311
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
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