Catalysts based on supported 12-molybdophosphoric acid

被引：126
|
作者：
Vázquez, PG [1 ]
Blanco, MN [1 ]
Cáceres, CV [1 ]
机构：
[1] UNLP, CONICET, CINDECA, RA-1900 La Plata, Buenos Aires, Argentina
来源：
CATALYSIS LETTERS | 1999年 / 60卷 / 04期
关键词：
molybdophosphoric acid; titania; silica; alumina; carbon; equilibrium adsorption impregnation;
D O I：
10.1023/A:1019071410838
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：
Catalysts preparation by equilibrium adsorption of 12-molybdophosphoric acid in water-ethanol solutions onto silica, titania, carbon and alumina is studied. The solute/support interaction follows the decreasing order: alumina, carbon, silica and titania. It is observed that the molybdophosphoric acid keeps its Keggin-type structure after being supported at room temperature on all supports. This species is stable up to 500 degrees C on silica, 400 degrees C on titania or carbon and 250 degrees C for alumina. The acidity of the supported heteropoly acid decreases in the following order: silica > titania > carbon > alumina.
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页码：205 / 215
页数：11
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