DEVELOPMENT IN THE SYNTHESIS AND APPLICATION OF MICROPOROUS MOLECULAR SIEVE ZSM-22

Abstract

Abstract: ZSM-22 molecular sieve has medium-strength surface acidity and appropriate pore structure and exhibits excellent catalytic activity in many reactions, such as long-chain alkane isomerization and olefin isomerization. The catalytic activity, selectivity, thermal stability and operational life of ZSM-22 are mainly dependent on their physicochemical properties, e.g pore structure, surface acidity, grain size, and chemical composition of crystal. It is very important for catalyst design to understand the influence of physicochemical properties on catalytic performance. By comparing the characteristics of different synthesis methods of ZSM-22 molecular sieve, the effects of synthesis methods on the activity, selectivity, structure and other physical and chemical properties of molecular sieve were analyzed. The application status of ZSM-22 molecular sieve, the optimization of the application results and the extension of the range were summarized.

Key words: ZSM-22 molecular sieve, hydrothermal synthesis method, lonic liquid, isomerization

CLC Number:

References

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