The country has made great breakthroughs of the zeolite molecular sieve materials research

Zeolite is a crystalline aluminosilicate hydrate of metal salt, defined by the formula: Mx / m [(AlO2) x · (SiO2) y] · zH2O. M represents a cation, m represents the number of its valence, z is a hydration number, x and y are integers. After the activation of zeolites, the water molecules are removed, the remaining atoms to form a cage-like structure, a pore size of 3 ~ 10 & Aring ;. Molecular sieve crystals have a number of holes with a diameter (also called "window") is connected between a plurality of holes of a certain size, a hole. Because molecular sieve can adsorb molecules smaller than the pore diameter into the hole inside, but larger than the pore size of the molecular exclusion in its hole, but played the role of screening molecules, so named molecular sieves.
Progress made series FJIRSM CAS researcher Zhang Jian led the research team recently on the zeolite molecular sieve oxysiv materials research. Research group designed and synthesized a series of metal organic zeolite material not only has a higher specific surface area and pore structure excellent regulation performance, and hydrogen storage, carbon dioxide capture and catalysis research shows potential applications.

The Task Force also benefit organic framework compounds successfully synthesized molecular sieve type case has MTN topology fluorescent molecular sieve materials development provides a new idea. In addition, they are still the class of molecular sieve material gas adsorption and catalytic properties of the series has also made progress in other chiral porous materials developed for CO2 adsorption capacity of porous material than has been reported.
Zeolite adsorption has two characteristics:
(1) Lewis center polar surface on strong;
(2) zeolite cages or channels of small size makes them very strong gravitational field. Therefore, the adsorption capacity of the adsorbate molecules is far more than other types of adsorbents. Even adsorbate partial pressure (or concentration) is low, the adsorption capacity is still considerable. Zeolite adsorption separation not only with the size and shape of the adsorbate molecules, but also on their polarity, and therefore, zeolitic molecular sieves can also be used to separate substances of similar size.