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Molecular sieve (also known as synthetic zeolite) is a kind of microporous aluminosilicate crystals. The types of molecular sieves are mainly divided into type A, type X, type Y, etc. according to their crystal structure.
Adsorption is a physical phenomenon in which gaseous and liquid substances (adsorbents) are fixed on a solid surface (adsorbent). This solid (adsorbent) has a large number of microporous active surfaces, and the molecules of the adsorbate are attracted by the surface of the adsorbent. The magnitude of gravity depends on three points.
①The structure of the zeolite adsorbent surface (microporosity)
②The partial pressure of adsorbent
③temperature
Adsorption is accompanied by exotherm, which is a reversible phenomenon. Similar to condensation:
Increase the pressure, the adsorption capacity increase.
Decrease the temperature, the adsorption capacity increase.
Therefore, during adsorption, the pressure should be raised to the highest and the temperature should be lowered to the lowest. When desorption, the pressure should be reduced to the lowest and the temperature should be raised to the highest.
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