... , ethylene, propylene, butadiene.The pore size for 4A can mainly used to adsorb water, methanol, ethanol, sulfureted hydrogen, carbon oxide, ... does not adsorb any larger molecular than 4A, and often used as desiccant in industries.Typical applications:1) Deep drying of ... .it can adsorb any molecular smaller than 10A, mainly used as catalyze carrier, coadsorption of CO2 and H2O and H2S,as desiccant ...