Progress on Preparation of Desiccants Used in Refrigerant System

Abstract

The desiccants such as silica gel,active alumina,active carbon,and molecular sieve,are employed to purify the contaminations in the refrigerant system.With the development of new refrigerants,the properties of desiccants need to be improved.Based on the analysis on the different preparations of the desiccants,the following two concepts were presented:(1) to increase water capacity and compatibility with the refrigerants or the refrigeration oil;(2) to simplify the techniques and to reduce the cost.Because of homogeneous aperture of the molecule structure,high specific surface area,and selectivity adsorption,the molecular sieve desiccant is the most applicable desiccant material.It is necessary for us to study the molecular sieve desiccant preparation techniques and the modification of the molecular sieve.