Effect of steam content and O2 pretreatment on the catalytic activities of Au/CeO2–Fe2O3 catalysts for steam reforming of methanol

The Au/CeO2–Fe2O3 prepared by deposition–precipitation were studied by steam reforming of methanol at a reaction temperature range of 200–400°C. Complete methanol conversion was obtained at the optimal steam/methanol ratio of 2 at 400°C. A high steam content strongly depressed both methanol conversi...

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Bibliographic Details
Published in:Journal of industrial and engineering chemistry (Seoul, Korea) 2014, 20(3), , pp.961-971
Main Authors: Pojanavaraphan, Chinchanop, Luengnaruemitchai, Apanee, Gulari, Erdogan
Format: Article
Language:English
Subjects:
Au catalyst
Carbonate
Hydrogen
Methanol
Steam reforming
화학공학
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Summary:The Au/CeO2–Fe2O3 prepared by deposition–precipitation were studied by steam reforming of methanol at a reaction temperature range of 200–400°C. Complete methanol conversion was obtained at the optimal steam/methanol ratio of 2 at 400°C. A high steam content strongly depressed both methanol conversion and hydrogen concentration since this led to a complex mechanism and the formation of carbonate and formate species. After pretreating with oxygen, the catalytic activity dramatically decreased with the presence of an inhomogeneous CexFe1−xO2 solid solution phase; the covering Au sites by the free α-Fe2O3 particles; and an agglomeration of both free α-Fe2O3 and Au particles.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2013.06.029