Chromia-alumina catalysts physical properties

The Physical-Chemical Properties of Chromia-Alumina Catalysts Charles P. Poole, Jr. and D. S. MacIver... 

Poole, C.P. Maciver, D.S. The physical-chemical properties of chromia-alumina catalysts. In Advances in Catalysis, Academic Press, 1967 Vol. 17, 223-314. 

Poole, C.P. Kehl, W.L. Maciver, D.S. Physical properties of coprecipitated chromia-alumina catalysts. J. Catal. 1962, 1, 407 15. 

The Physical-Chemical Properties of Chromia-Alumina Catalysts... 

The present chapter has as its primary objective the description of the molecular configurations of chromium in chromia-alumina catalysts, and the possible relationships of these configurations to the catalytic properties of chromia-alumina. Emphasis, however, will be placed on the solid state physical chemistry of these catalysts, rather than on the details of their catalytic behavior, since this latter subject is of sufficient complexity to warrant a separate treatment. 

PHYSICAL-CHEMICAL PROPERTIES OF CHROMIA-ALUMINA CATALYSTS 233... 

PHYSICAL-CHEMICAL PROPERTIES OP CHROMIA-ALUMINA CATALYSTS 236... 

The physical-chemical methods used to study the chromia-alumina catalyst system have provided a coherent picture of its electronic structure. This picture has emerged in spite of the great complexities of the properties exhibited by the system. The most fruitful lines for future investigation will probably be a simultaneous study of the catalytic and physical-chemical properties of various types of chromia-alumina samples. When sufficient data of this type become available, it should be possible to formulate an over-all theory to account for the physical-chemical and catalytic properties of chromia-alumina catalysts. 

In brief, the catalysts under consideration are highly porous, poorly crystallized, heterogeneous mixtures of various oxides of alumina and chromia whose structures are of considerable complexity. In the following sections we will briefly describe the physical and chemical techniques one can use to elucidate the structures of these catalysts, and then we will discuss some relevant properties of chromia, alumina, and chromia-alumina solid solutions, before turning to a consideration of the catalysts themselves. 

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