Keggin-type heteropolyacids supported on sol-gel oxides as catalysts for the dehydration of glycerol to acrolein

被引：16
作者：
Kraleva, E. [1 ]
Atia, H. [1 ]
机构：
[1] Univ Rostock, Leibniz Inst Katalyse eV, Albert Einstein Str 29a, D-18059 Rostock, Germany
来源：
REACTION KINETICS MECHANISMS AND CATALYSIS | 2019年 / 126卷 / 01期
关键词：
Heteropolyacids; Effect of supports; Catalysts; Dehydration; Glycerol; Acrolein; GAS-PHASE DEHYDRATION; SUSTAINABLE PRODUCTION; OXIDATION; CONVERSION; BIOMASS;
D O I：
10.1007/s11144-018-1471-4
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：
Glycerol dehydration to acrolein was performed at temperatures of 220-300 degrees C over Keggin-type heteropolyacids (H(4)SiW(12)O(40)xH(2)O and H(4)PVMo(11)O(40)xH(2)O), supported on sol-gel prepared alumina, titania, zirconia and three-mixed oxide AlTiZr. The supports and catalysts were characterized by nitrogen adsorption, XRD, IRpyridine adsorption and EPR spectroscopy. Tungsten based heteropolyacids showed outstanding performance and stability. Acrolein was always the predominant product with a maximum selectivity of 75% at complete conversion over silicotungstic acid supported over zirconia and titania. Textural properties of samples affected their catalytic performance during the test reaction.
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收藏
页码：103 / 117
页数：15
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