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Catalysts 2016, 6(2), 19; doi:10.3390/catal6020019

High Selectively Catalytic Conversion of Lignin-Based Phenols into para-/m-Xylene over Pt/HZSM-5

Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Academic Editor: Andreas Martin
Received: 24 October 2015 / Revised: 2 December 2015 / Accepted: 3 December 2015 / Published: 22 January 2016
(This article belongs to the Special Issue Zeolite Catalysis)
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Abstract

High selectively catalytic conversion of lignin-based phenols (m-cresol, p-cresol, and guaiacol) into para-/m-xylene was performed over Pt/HZSM-5 through hydrodeoxygenation and in situ methylation with methanol. It is found that the p-/m-xylene selectivity is uniformly higher than 21%, and even increase up to 33.5% for m-cresol (with phenols/methanol molar ratio of 1/8). The improved p-/m-xylene selectivity in presence of methanol is attributed to the combined reaction pathways: methylation of m-cresol into xylenols followed by HDO into p-/m-xylene, and HDO of m-cresol into toluene followed by methylation into p-/m-xylene. Comparison of the product distribution over a series of catalysts indicates that both metals and supporters have distinct effect on the p-/m-xylene selectivity. View Full-Text
Keywords: m-cresol; hydrodeoxygenation; methanol; p-/m-xylene; methylation m-cresol; hydrodeoxygenation; methanol; p-/m-xylene; methylation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liu, G.; Zhao, Y.; Guo, J. High Selectively Catalytic Conversion of Lignin-Based Phenols into para-/m-Xylene over Pt/HZSM-5. Catalysts 2016, 6, 19.

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