Valorisation of glycerol by condensation with acetone over silica-included heteropolyacids

被引：163

作者：

Ferreira, P. ^{[1
]}

Fonseca, I. M. ^{[2
]}

Ramos, A. M. ^{[2
]}

Vital, J. ^{[2
]}

Castanheiro, J. E. ^{[1
]}

机构：

[1] Univ Evora, Dept Quim, Ctr Quim Evora, P-7000671 Evora, Portugal

[2] Univ Nova Lisboa, Fac Ciencias & Tecnol, CQFB, REQUIMTE, P-2829516 Caparica, Portugal

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2010年 / 98卷 / 1-2期

关键词：

Glycerol; Acetalisation; Heteropolyacids; Silica; GAS-PHASE DEHYDRATION; 12-TUNGSTOPHOSPHORIC ACID; ACTIVATED CARBON; SUSTAINABLE PRODUCTION; MEMBRANE REACTORS; ALPHA-PINENE; ACETIC-ACID; CATALYST; ESTERIFICATION; ACROLEIN;

D O I：

10.1016/j.apcatb.2010.05.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The acetalisation of glycerol was studied using heteropolyacids, immobilized in silica, as catalysts, at 70 degrees C. The main product of glycerol acetalisation was solketal. The tungstophosphoric (PW), molybdophosphoric (PMo), tungstosilisic (SiW) and molybdosilisic (SiMo) acids were immobilized in silica by sol-gel method. It was observed that the catalytic activity decreases in the series: PW_S > SiW_S > PMo_S > SiMo_S. All catalysts exhibited good values of selectivity to solketal (about 98% near complete conversion). The effect of different parameters, such as catalyst loading, molar ratio of glycerol to acetone and temperature on the glycerol acetalisation, over PW_S catalyst, was studied. Catalytic stability of the PW_S, SiW_S, PMo_S and SiMo_S catalysts was evaluated by performing consecutive batch runs with the same catalyst sample. After the third batch, it was observed a stabilisation of the initial activity. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：94 / 99

页数：6

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