萍乡金丰现货质好分子筛吸附剂、空气的干燥净化天然气脱水脱硫

Molecular sieveMolecular sieve structure

Porous and cavity systems with molecular sizes typically ranging from 0.3 to 2.0 nanometers, thus possessing the characteristic of sieving molecules. However, with the deepening research on the synthesis and application of molecular sieves, researchers have discovered phosphoaluminate molecular sieves. The framework elements of molecular sieves (silicon, aluminum, or phosphorus) can also be replaced by B, Ga, Fe, Cr, Ge, Ti, V, Mn, Co, Zn, Be, and Cu, etc. The size of their pores and cavitiescan exceed 2 nanometers. Therefore, molecular sieves can be classified according to their framework elements into silicon-aluminum molecular sieves, phosphoaluminate molecular sieves, and framework heteroatom molecular sieves. Based on pore size, molecular sieves with pore sizes less than 2 nanometers, 2 to 50 nanometers, and greater than 50 nanometers are respectively called microporous, mesoporous, and macroporous molecular sieves. Due to their larger pore sizes, they serve as excellent载体用于涉及较大分子的反应。然而，介孔材料的孔壁是无定形的，这限制了它们的水热稳定性和热稳定性，无法满足石化应用所需的苛刻条件。

Due to the presence of metal ions with low electrical charges and large ionic radii, as well as combined states of water, water molecules continuously lose water when heated. However, the crystal lattice structure remains unchanged, resulting in the formation of many cavities of equal size. These cavities are connected by many micropores of the same diameter. These tiny pores have a uniform diameter, allowing them to adsorb molecules smaller than the pore diameter into the cavities, while repelling molecules larger than the pore diameter. Thus, they can separate molecules with different shapes and diameters, different polarities, different boiling points, and different degrees of saturation. In other words, they function as a "sieve" for molecules, which is why they are called molecular sieves. Currently, molecular sieves are widely used in industries such as metallurgy, chemical engineering, electronics, petrochemicals, and natural gas.