Zeolite molecular sieve regeneration and preservation

In order to obtain good operating performance and the longest possible life, the zeolite must be regenerated after the sieve has been used for a certain period of time. Correctly regenerated zeolite molecular sieves, like fresh ones, have very low attenuation and aging of their adsorption and mechanical properties.

There are two basic methods for regeneration of zeolite molecular sieves:

1) Change the temperature, that is, "change temperature." It removes the adsorbed material by heating the molecular sieve. The industry generally uses preheated regeneration gas to heat, blow out the molecular sieve to about 200, and take away the adsorbed material.

2) Change the relative pressure, that is, "pressure change." Generally used for gas phase adsorption process. The basic method is to keep the temperature of the adsorbent constant and remove the adsorbate by reducing the pressure and backflushing the inert gas.

The regeneration is usually carried out in the same direction as the adsorption, so that most of the adsorbate contained in the inlet of the adsorption bed does not have to pass through the entire bed, and some of the molecular sieves may not be in contact with the hot humid gas, thereby increasing the service life of the molecular sieve. The regeneration gas should be as dry as possible, otherwise it will affect the adsorption efficiency. 

Zeolite Molecular sieve preservation:

If it is used for drying, adsorption separation, catalytic cracking "molecular sieve", that is, "aluminosilicate type desiccant", then as long as sealed and stored, it does not let it absorb moisture and other substances can be adsorbed. Of course, do not be contaminated by other substances. In theory, molecular sieves can be “adsorption-desorption (regeneration)-adsorption-desorption (regeneration) and even forever. It is not a dangerous product in itself and it is easy to keep.