adsorb gas and liquid such as water ,natural gas; the high water adsorption properties; used widely in industry 1. Performance ... characteristics:4A molecular sieve's aperture is 4A,it adsorbs water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ... drying of air, natural gas, paraffin gas ,liquid cooling agent and so on, and liquid. * Preparation and purification of argon gas. ...