Chromia general considerations

As explained earlier, chromia-alumina can be considered as a dual functional system, having both an acidic function and a hydrogenation-dehydrogenation function. While the present discussion is primarily concerned with the molecular configuration of the chromia dehydrogenation component, neither function can be considered entirely out of context. At the present time, however, the nature of catalyst acidity in general remains somewhat obscure, despite a considerable amount of research, and only a brief review of the acid character of chromia-alumina catalysts will be given here. 

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