LAWS OF FORMATION OF ACTIVE AND SELECTIVE CATALYTIC SYSTEMS ON THE BASIS OF CLINOPTILOLITE FOR HEAVY HYDROCARBONS CRACKING PROCESS
Keywords:
clinoptilolit, modification, texture, morphology, acidity, cracking catalytic systemsAbstract
Using the modern physical methods (XPS, SEM, TEM, BET) regularities in the formation of catalytic systems based on clinoptilolite by the modification of various by nature acids were revealed. It is shown that as a result of interaction of the modifier with an active surface new structure is created, which lead to a significant increase in specific surface area and catalytic activity. A detailed study of the zeolite surface with TEM HR showed the formation of stable structures of clusters, which are partially embedded in the volume of the zeolite. The sizes of these clusters are 1-2 nm and are available for the reactants. It is believed that as a result of impregnating and calcining the catalytic systems, translation of heteropolyacid particles into highly dispersed state is achieved, where the heteropolyacid particles perform specific adsorption and catalytic properties.
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