How to quickly understand the molecular sieve structure？ ——Three Microscopic Molecular Sieves Structure and Characteristics
Robert Lee
Trusted molecular sieve manufacturer- Luoyang Jalon Micro-nano New Materials Co., Ltd.
A molecular sieve is a silicate crystal with many micropores with uniform pore size. The skeleton is usually negatively charged and the pores have cations that balance the negative charge of the skeleton. There are up to dozens of types of molecular sieves, but at present large-scale production and widely used are A-type, X-type and Y-type, M-type and ZSM series.
NO.1 A-type molecular sieves are 8-membered ring channels；
NO.2 X-type, Y-type and M-type molecular sieves are all 12-membered ring channels；
NO.3 ZSM-5 is a 10-membered ring tunnel.
In addition, molecular sieves have another important characteristic-shape-selective adsorption.
Depending on the size of the pores, molecular sieves can selectively adsorb small molecules that can enter the pores, while molecules that cannot enter the pores do not. In addition, because the molecular sieve crystal is ionic, and has a strong electric field gradient inside, the adsorption capacity of the gas is related to the polarity of the gas molecules.