PREPARATION CHARACTERISTICS OF CATALYSTS FOR FOSSIL FUEL CONVERSION

The article reviews some of the technical Intricacies which are Involved In the preparation of metal oxide containing catalysts. In processing of energy resources, representative reactions catalysed by metal oxides Include cracking, reforming, hydrofining, water-gas shift, and methanol synthesis. The preparatory methods of metal catalysts control the selectivity, stability and activity for a particular reaction.

The specifics of the technique of preparation and the chemical nature of a catalyst control the main stream of chemical products and the duration of continuous operation of reactors. The nature of metal-support plays an important role, other than to stabilize the small particles of the metal. Certain supports like zeolites, polymers, reducible oxides modify drastically the catalytic properties of metals. Addition of an inactive additive to a metal catalyst produces a large effect on both catalytic activity and resistance to poisoning of the pure metal. A defined porous structure, the size of the Internal surface and the mechanical strength are the additional criteria on which the success of the art of catalyst preparation depends.