Abstract
Various methods for improving the catalyst selectivity to conversion of oxygenates to liquid hydrocarbons are discussed. Literature analysis reveals that the key factors determining the selectivity of zeolite-containing catalysts are the structure type and acid properties of the zeolite. The strength and distribution of the acid sites are shown to depend on the structure type and chemical composition of the zeolite framework, as well as on the chemical nature of exchange cations. Methods for changing acid properties of zeolites are considered, among which are modifying with various cations, post-synthetic acid, alkali or steam treatment.
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