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, ethylene, propylene, and does not adsorb any molecular larger than 4A(including propane), the choice to water adsorption properties ...