SORPTION PROPERTIES OF ZEOLITE-Y MODIFIED BY CONTROLLED DEPOSITION OF INTRACRYSTALLINE COKE

The possibility of zeolite Y modification by controlled deposition of coke during the process of methanol conversion was studied. It was found that coke deposits lower the sorption capacity of the zeolite, which yields the possibility to obtain modified zeolite of definite sorption properties. The process of coking was analysed using the results of kinetic measurements, XRD, IR, TGA, and sorption-isotherms determination. The Polanyi-Dubinin potential theory was applied to describe the water-vapor sorption isotherms.