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Production of renewable p-xylene from 2,5-dimethylfuran via Diels–Alder cycloaddition and dehydrative aromatization reactions over silica−alumina aerogel catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
50050 46778 2015 5 PDF Available
Title
Production of renewable p-xylene from 2,5-dimethylfuran via Diels–Alder cycloaddition and dehydrative aromatization reactions over silica−alumina aerogel catalysts
Abstract

•Cycloaddition of dimethylfuran for renewable p-xylene with silica−alumina aerogels•The p-xylene yield is a function of the concentrations of the Brønsted acid sites.•The rate of p-xylene production increases significantly in polar aprotic solvents.

We report the selective conversion of biomass-derived 2,5-dimethylfuran (DMF) to p-xylene (~ 70% selectivity) through Diels–Alder cycloaddition and subsequent dehydration with silica−alumina aerogel (SAA) catalysts. The high activity of SAA can be attributed to its high surface area, large mesoporous volume, and high acid site concentrations. The conversion of DMF and the yield of p-xylene were strongly dependent on the silica alumina ratio of SAA. A higher aluminum content in SAA led to a progressive increase in the concentration of Brønsted acid sites and a corresponding increase in the p-xylene production rate. The effect of solvent on the production of p-xylene was examined, and it was found that the p-xylene production rate increases significantly in polar aprotic solvents (i.e. 1,4-dioxane).

Keywords
Cycloaddition; Diels–Alder; 2,5-Dimethylfuran; p-Xylene; Silica–alumina aerogels (SAA)
First Page Preview
Production of renewable p-xylene from 2,5-dimethylfuran via Diels–Alder cycloaddition and dehydrative aromatization reactions over silica−alumina aerogel catalysts
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 70, 5 October 2015, Pages 12–16
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis