Bulk and Surface Properties on Catalytic Performance

Influence of Bulk and Surface Properties on Catalytic Performance 

There have been several studies of the catalytic character of tin-antimony oxides, and in this section an attempt will be made to relate the results to the solid state properties of the catalyst which have already been considered. 

Studies of the activity and selectivity of tin-antimony oxides for the oxidation of propylene to acrolein have been reviewed by Hucknall (6), and more recent investigations of hydrocarbon oxidation over the catalyst have been described by Higgins and Hayden (7). In this article only those studies that are directly relevant to the fundamental properties of the catalyst will be reexamined. 

However, as with other aspects of this catalyst, there is little unanimity as to the significance of specific cationic oxidation states in the formation of active sites. Indeed, Roginskaya et al. (11) reported that the catalytic activity for the oxidative dehydrogenation of butenes and ammoxidation of 

A similar lack of clarity pervades other areas concerning the relationship between the catalytic performance and fundamental properties of the catalysts. Wakabayashl et al. (10) reported that the optimized conversion of propylene to acrolein ( 7%) over alumina-supported tin-antimony oxide (3 1) was dependent on the sintering temperature of the catalyst and was maximized after heating at 10(X)°C for 3 hr. Further work (22) showed that both electrical conductivity and surface area were maximized in the material containing 3% antimony and a close association between acrolein production and solid solution formation was suggested. 

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Becker, S. Baems, M. (1991). Oxidative coupling of methane over La203-Ca0 catalysts. Effect of bulk and surface properties on catalytic performance. J. Catal, 128, 512-519. 

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