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Deoxygenation of m-cresol on Pt/γ-Al2O3 catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
54768 47026 2013 9 PDF Available
Title
Deoxygenation of m-cresol on Pt/γ-Al2O3 catalysts
Abstract

•Pt/Al2O3 catalysts are very active for m-cresol deoxygenation.•High selectivities to toluene are obtained at 300 °C.•At lower temperature, methylcyclohexane yield increases.•Coke deposition follows a parallel mechanism.•Benzene is formed by toluene demethylation.

In this work the deoxygenation of m-cresol, used as a bio-oil model compound, was studied at atmospheric pressure, using Pt/γ-Al2O3 catalysts. The main products obtained in this system were toluene, benzene and methylcyclohexane. Possible reaction routes for cresol deoxygenation were proposed. The influence of the metal loading, H2/cresol ratio and temperature on products distribution was analyzed. Catalyst deactivation was studied by TPO. The catalysts were characterized by XPS, XRD, BET, TPR, and TEM. Product distribution is explained based on the relative rates of cresol dehydroxylation and demethylation, which leads to toluene and phenol formation, respectively. High selectivity to toluene was obtained with the catalyst with the higher metal loading (1.7 wt.%), while in the case of low metal loading (0.05 wt.%) high yields of light hydrocarbons were obtained. Coke deposition took place preferentially on the metal particles and could be removed by treatment at low temperatures, e.g. 350 °C. This catalyst displays a very good activity and selectivity towards toluene formation at mild temperature (300 °C) and atmospheric pressure, which is a better performance than that already reported for other catalysts.

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Keywords
Deoxygenation; Bio-oil; Cresol; Platinum; Alumina
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Deoxygenation of m-cresol on Pt/γ-Al2O3 catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 213, 15 September 2013, Pages 9–17
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us