期刊
JOURNAL OF CATALYSIS
卷 280, 期 1, 页码 8-16出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2011.02.001
关键词
Bio-oil; Phenol derivatives; Aqueous-phase catalysis; Hydrodeoxygenation; Palladium; Dual-functional catalysis
资金
- Technische Universitat Munchen
The kinetics of the catalytic hydrodeoxygenation of phenol and substituted phenols has systematically been investigated on the dual-functional catalyst system Pd/C and H3PO4 in order to better understand the elementary steps of the overall reaction. The reaction proceeds via stepwise hydrogenation of the aromatic ring, transformation of the cyclic enol to the corresponding ketone, hydrogenation of the cycloalkanone to the cycloalkanol and its subsequent dehydration as well as the hydrogenation of the formed cycloalkene. The presence of dual catalytic functions is indispensible for the overall hydrodeoxygenation. The dehydration reaction is significantly slower than the hydrogenation reaction and the keto/enol transformation, requiring a significantly larger concentration of Bronsted acid sites compared to the available metal sites for hydrogenation. (C) 2011 Published by Elsevier Inc.
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