molecular sieve grace

Zeolite is a natural zeolite powder molecular sieve grace ground from rock, the color is white. Can remove 95 percent of ammonia, water purification, to ease transfer water phenomenon.

Superficial knowledge of the porous molecular sieve material

Porous psa oxygen generator molecular sieve materials are an important class of inorganic non-metallic advanced materials in the fields of petrochemical, materials science, energy storage, environmental protection and management, bio-medicine, with a broad expansion of space and good prospects.  With the deepening of research work, according to the actual needs of human beings to design and synthesize more features excellent performance molecular sieve materials, as people's living standards improve, the development of human civilization and social progress, play an important role. 

 In recent years, our country has made significant progress in zeolite synthesis and preparation as well as the catalytic converter and other molecular sieve powder catalytic materials research by the national attention, since the "Plan", has won a major project of the National Natural Science Foundation, the National Climbing Program and the state's major Basic Science Program (973) and other project support, has made a series of major scientific and technological achievements.  Especially Zeolite synthesis of mesoporous materials research and other fields are at the international forefront.

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. ......