The Schwank Group

-Synthesis of ZSM-5 Zeolite and its Catalytic Performance-

Hui Feng, Xiaoyin Chen, and Johannes Schwank

SEM Images of ZSM-5

SEM picture of silica gel (1) and ZSM-5 zeolite with different crystal
sizes synthesized on the surface of the silica gel (2-4)

ZSM-5 zeolite, first invented by Argauer and Landolt in 1972, selectively promotes cracking of C7-C13 straight and short branched hydrocarbons of gasoline to C3-C5 olefins. Therefore, it is a preferred active component for low-carbon alkene production during fluidized catalytic cracking (FCC). However, during industrial catalyst preparation, ZSM-5 is inevitably mixed with binder, thereby reducing the contact with the feedstock and lowering the efficiency of ZSM-5. It is interesting to grow a layer of ZSM-5 zeolite on the mother-support.

Silica gel is a mesoporous form of silica, because of its distinct advantages, such as high porosity, high specific surface area, high heat resistance and high abrasive resistance strength, which is extensively, used as a support materials for heterogeneous catalysis. So far, most researches focused on the preparation of metal, metal oxide or other compound catalysts, but only few studies were about the synthesis of zeolite supported on the silica gel.

Therefore, we are focusing on growing a layer of ZSM-5 zeolite with different crystal size and morphologies on the silica gel. And the properties and catalytic perfomances of ZSM-5 with different morphology and crystal size will be investigated. Insights gained will contribute to the development of high effective ZSM-5 catalyst with high hydrothermal stability. The ultimate goal of our work is the development of a novel catalytic material capable of maximizing light olefins yields.

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