Journal
JOURNAL OF CATALYSIS
Volume 281, Issue 1, Pages 21-29Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2011.03.030
Keywords
Bifunctional hydrodeoxygenation; Phenolic compound; Pt/HBeta; Anisole; Lignin; Hydrogenation; Hydrogenolysis
Categories
Funding
- National Science Foundation EPSCOR [0814361]
- Department of Energy [DE-FG36GO88064]
- Oklahoma Bioenergy Center
- Office Of The Director
- EPSCoR [0814361] Funding Source: National Science Foundation
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The catalytic conversion of anisole (methoxybenzene), a phenolic model compound representing a thermal conversion product of biomass lignin, to gasoline-range molecules has been investigated over a bifunctional Pt/HBeta catalyst at 400 degrees C and atmospheric pressure. The product distribution obtained on the bifunctional catalyst was compared with those obtained on monofunctional catalysts (HBeta and Pt/SiO2). This comparison indicates that the acidic function (HBeta) catalyzes the methyl transfer reaction (transalkylation) from methoxyl to the phenolic ring, yielding phenol, cresols, and xylenols as the major products. The metal function catalyzes demethylation, hydrodeoxygenation, and hydrogenation in sequence, resulting in phenol, benzene, and cyclohexane. On the bifunctional catalyst, both methyl transfer and hydrodeoxygenation are achieved at significantly higher rates than over the monofunctional catalysts, leading to the formation of benzene, toluene, and xylenes with lower hydrogen consumption and a significant reduction in carbon losses, in comparison with the metal function alone. In addition, on the bifunctional Pt/HBeta, the rate of deactivation and coke deposition are moderately reduced. (C) 2011 Elsevier Inc. All rights reserved.
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