Catalytic activity of Au-Cu/CeO2-ZrO2 catalysts in steam reforming of methanol

Authors: Chinchanop Pojanavaraphan, Apanee Luengnaruemitchai, Erdogan Gulari

Abstract:
Bimetallic Au-Cu/Ce_0.75Zr_0.25O₂ catalysts prepared by deposition–precipitation were tested for steam reforming of methanol(SRM)in the range of 200–500^◦C. Many effective parameters—Au/Cu atomic ratio, gas pretreatment, total metal loading, and calcination temperature—were investigated and correlated with catalyst properties. At the Au/Cu ratio of 1/3, the homogeneous Au–Cu alloy was found to be active for SRM, while an inhomogeneous or partially developed alloy formation was found after applying H2 and O₂ pretreatments. There were no significant differences in catalytic activity with different total loadings and calcination temperatures; however, the 7 wt% Au-Cu catalyst calcined at 300 ◦C exhibited complete methanol conversion, 82% H₂ selectivity, and 1% CO selectivity at a low temperature of 300^◦C. In regards to stability, the bimetallic catalyst displayed a long life, even though coke and metallic copper were formed.

Keywords:
Steam reforming of methanol
Hydrogen
Alloy
Bimetallic
Au catalyst

Published in: Applied catalysis A: General  (Volume 456, Pages 1-248, 10 April 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Catalytic activity of Au-Cu/CeO2-ZrO2 catalysts in steam reforming of methanol

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