Research on small grains ZSM-5 zeolite catalyst stability

 Small crystal molecular sieves 5a stability and its good resistance to carbon deposition capacity.
 Looking at the results from the test response analysis of methanol in different grain sizes of ZSM-5 zeolite on the conversion, the amount of coke ZSM-5 zeolite surface even a small amount of coke grains is higher than a large grain of ZSM-5 zeolites molecular sieve catalyst life of small grains larger than grains of zeolite long.
 This phenomenon is due to the small grain size of ZSM-5 zeolite with a large pore volume and appearance of the area and the outer surface of the acid sites and more features, large pore volume of the catalyst can effectively increase the ability of anti-deactivation, more external surface acid sites can during the reaction to ensure that there are more active center can be used; the contrary, the large grainsmolecular sieve powder with a small external surface area ratio of inner surface area and the average particle diameter is large, the molecular diffusion resistance is large, pores are formed in the macromolecular product is not easily diffuse out, thereby blocking pores, reducing the effective utilization of the acid center, to accelerate catalyst deactivation.

 More detailed information please ZSM-5 zeolite molecular sieve attention largest production base in Shandong Qilu Hua letter Hi-Tech Co., Ltd. ......