Acidic cesium salts of 12-tungstophosphoric acid as catalysts for the dehydration of xylose into furfural

被引：147

作者：

Dias, Ana S. ^{[1
]}

Lima, Sergio ^{[1
]}

Pillinger, Martyn ^{[1
]}

Valente, Anabela A. ^{[1
]}

机构：

[1] Univ Aveiro, CICECO, Dept Chem, P-3810193 Aveiro, Portugal

来源：

CARBOHYDRATE RESEARCH | 2006年 / 341卷 / 18期

关键词：

xylose; furfural; dehydration; solid acid catalysis; cesium salts; heteropolyacid; 12-tungstophosphoric; mesoporous silicas; MCM-41;

D O I：

10.1016/j.carres.2006.10.013

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Cesium salts of 12-tungstophosphoric acid, CsxH3-xPW12O40 (CSx,PW), in the bulk form or supported on medium-pore MCM-41 (3.7 nm) or large-pore (9.6 nm) micelle-templated silicas are active solid acid catalysts for the cyclodehydration of xylose into furfural, in a toluene/water solvent system (T/W) or in dimethyl sulfoxide (DMSO). The catalytic results are comparable to those obtained using sulfuric acid, under similar reaction conditions. The initial activities increase in the order H3PW12O40 < Cs2.0PW < Cs2.5PW < silica-supported CsPW catalysts (15, 34 wt % PW). Higher HPA loadings, larger pore diameter of the parent silica support, and higher reaction temperatures lead to higher furfural yields. The stability and reusability of the MCM-41-supported CsPW is higher in DMSO than in T/W. (c) 2006 Elsevier Ltd. All rights reserved.

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页码：2946 / 2953

页数：8

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