Take you to understand USY series zeolite china
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USY series zeolite china has a close-packed hexagonal structure similar to diamond. If β cages are used as structural units to replace the carbon atom nodes of diamond, and two adjacent β cages are connected with hexagonal column cages, that is, 5 β cages are connected together with 4 hexagonal column cages, and one of the β cages is In the center, the remaining four β cages are located at the vertices of the regular tetrahedron, forming an octahedral zeolite crystal structure. If we continue to connect with this structure, we will get the structure of USY series zeolite china. In this structure, the large cage formed by the β cage and the hexagonal column cage is a faujasite cage, and the windows connected to them are twelve-membered rings, and the average effective pore size is 0.74nm, which is the pore size of the Y-type molecular sieve. . X-type molecular sieve has the same structure as USY series zeolite china, but USY series zeolite china has a higher silicon-aluminum ratio and stronger hydrothermal stability, so it is more widely used.
USY series zeolite china is the most widely used molecular sieve among all molecular sieves. USY series zeolite china modified after post-treatment is the main active component of fluid catalytic cracking catalyst.
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