Glycerol Valorization: Dehydration to Acrolein Over Silica-Supported Niobia Catalysts

被引：0
作者：
N. R. Shiju
D. R. Brown
K. Wilson
G. Rothenberg
机构：
[1] University of Amsterdam,Van’t Hoff Institute for Molecular Sciences
[2] University of Huddersfield,Materials and Catalysis Research Centre, Department of Chemical and Biological Sciences
[3] Cardiff University,Cardiff Catalysis Institute, School of Chemistry
来源：
Topics in Catalysis | 2010年 / 53卷
关键词：
Glycerol; Niobia; Microcalorimetry; Heterogeneous catalyst; Renewable;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The catalytic dehydration of glycerol to acrolein is investigated over silica-supported niobia catalysts in a continuous fixed-bed gas-phase reactor. Various supported niobia catalysts are prepared and characterized using surface analysis and spectroscopic methods (XRD, UV–Vis, XPS, N2 adsorption), as well as with ammonia adsorption microcalorimetry. Good results are obtained with initial glycerol conversions of over 70% and with 50–70% selectivity to acrolein. We investigate the influence of changing the catalyst acid strength by varying the niobia content and catalyst calcination temperature. Glycerol conversion and acrolein selectivity depend on the surface acid strength. Catalyst deactivation by coking is also observed, but simple oxidative treatment in air restores the activity of the catalysts completely.
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页码：1217 / 1223
页数：6
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