Acidic catalysts for the dehydration of glycerol: Activity and deactivation

被引：243

作者：

Suprun, Wladimir ^{[1
]}

Lutecki, Michal ^{[1
]}

Haber, Thomas ^{[1
]}

Papp, Helmut ^{[1
]}

机构：

[1] Univ Leipzig, Inst Ind Chem, D-04103 Leipzig, Germany

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2009年 / 309卷 / 1-2期

关键词：

Glycerol; Dehydration; Acrolein; Catalysis; Gas phase; Deactivation; ACROLEIN; BASE;

D O I：

10.1016/j.molcata.2009.04.017

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：

Al2O3 and TiO2 supports modified by impregnation with PO4-ions and SAPO-11 and SAPO-34 samples were synthesized and characterized by physico-chemical methods. The acidic properties of these catalysts were determined by ammonia TPD. The gas-phase dehydration of glycerol in presence of water was investigated at 280 degrees C. Glycerol conversion and acrolein selectivity depended on the total acidity and on the textural properties. Additionally, the formation of by-products during the dehydration of glycerol and the conversion of 1-hydroxyacetone and 3-hydroxypropionaldehyde catalysts was studied. The SAPO samples showed high selectivity at low reaction times. Rapid deactivation and formation of carbonaceous deposits was observed for all tested catalysts. The properties of the deactivated catalysts were studied by TPD-NH3 and TPO analysis. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：71 / 78

页数：8

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