The Catalytic Properties of Molecular Sieves

①　Activity requirements for catalytic reactions

Large specific surface area, uniform pore distribution, adjustable pore size, good shape selection for reactants and products.Stable structure, high mechanical strength, high temperature resistance <400～600℃>, good thermal stability, reusable after activation and regeneration;Non-corrosive to equipment and easy to separate from reaction products.It has no corrosion to the equipment and it is easy to separate from the reaction product. The "three wastes" are basically not generated in the production process. The waste catalyst is easy to treat and does not pollute the environment.For example, the research system of shape-selective catalysis includes almost all the conversion and synthesis of hydrocarbons, as well as the catalytic conversion of alcohols and other organic compounds containing nitrogen, oxygen,sulfur, and biomass.All these have opened up broad fields for basic research, applied research and industrial development.

①　Efficient catalysis of zeolite molecular sieve

For the zeolite used in industrial catalysis, high performance is the basic requirement and goal.The type and number of active centers and the microporous diffusion properties of catalytic materials are the intrinsic factors that affect their catalytic activity.Catalytic selectivity is closely related to the shape selectivity of micropore channels, the occurrence of side reactions, and the diffusion speed of each reaction molecule.Life is always an important index to measure the performance of catalytic materials.How to prolong catalyst life as long as possible is an eternal topic in catalytic process.On the premise that the catalyst activity meets the requirements, if the deactivated catalyst is easy to regenerate, the structure can be restored.Then with the appropriate reaction process, the catalyst life can be extended.Therefore, high performance not only puts forward higher requirements for zeolite molecular sieve materials, but also requires multi-scale combination and cooperation of catalytic materials, reaction processes and reaction engineering systems.Finally, the catalyst can achieve high performance in industrial application.