Sustainable hydrogen from bio-oil—Steam reforming of acetic acid as a model oxygenate

Steam reforming of acetic acid over Pt/ZrO 2 catalysts has been investigated. Pt/ZrO 2 catalysts are very active, completely converting acetic acid, and give a hydrogen yield close to thermodynamic equilibrium. The catalyst deactivated by formation of oligomers which block the active sites. The mech...

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Bibliographic Details
Published in:Journal of catalysis 2004-10, Vol.227 (1), p.101-108
Main Authors: Takanabe, Kazuhiro, Aika, Ken-ichi, Seshan, K., Lefferts, Leon
Format: Article
Language:English
Subjects:
Acetic acid
Bio-oil
Catalysis
Chemistry
Exact sciences and technology
General and physical chemistry
Hydrogen
Mechanism
Steam reforming
Sustainable
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
ZrO 2
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Summary:Steam reforming of acetic acid over Pt/ZrO 2 catalysts has been investigated. Pt/ZrO 2 catalysts are very active, completely converting acetic acid, and give a hydrogen yield close to thermodynamic equilibrium. The catalyst deactivated by formation of oligomers which block the active sites. The mechanism of both the reaction and the deactivation was studied with kinetic and spectroscopic measurements on Pt/ZrO 2, ZrO 2, and Pt black. It is shown that Pt is essential for steam reforming to proceed. ZrO 2 is needed to activate steam. ZrO 2, on the other hand, is also active for oligomer–precursor formation under the conditions investigated. Results obtained in the study show that steam reforming takes place at the Pt ZrO 2 boundary and that deactivation occurs when this boundary is blocked by oligomers.
ISSN:0021-9517
1090-2694
DOI:10.1016/j.jcat.2004.07.002