Influence of organic species on surface area of bismuth molybdate catalysts in complexation and spray drying methods

被引:51
|
作者
Le, MT
Van Well, WJM
Van Driessche, I
Hoste, S
机构
[1] State Univ Ghent, Dept Inorgan & Phys Chem, B-9000 Ghent, Belgium
[2] Hanoi Univ Technol, Dept Petrochem, Hanoi, Vietnam
[3] Univ Aalborg, Dept Chem Engn, DK-6700 Esbjerg, Denmark
关键词
bismuth molybdates; complexation; spray drying; surface areas; citric acid; selective oxidation; propylene;
D O I
10.1016/j.apcata.2004.03.007
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
With this report we describe the increase in specific surface area of high purity batches of three phases of bismuth molybdate catalysts by the combination of two techniques: a complexation method and spray drying. Thermal decomposition of the citric acid in the precursor is the origin of the increase in surface area of the catalysts. The optimal amounts of added citric acid were established for both complexation and spray drying methods. Furthermore, the spray drying was improved by adding sorbitol or changing the pH of the precursor solutions. The obtained high surface area catalysts obviously exhibit higher catalytic activity, opening promising applications of the methods. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:227 / 234
页数:8
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