... The pore size of 3A molecular sieve is 3A. It does not adsorb any molecular larger than 3A according to ... carbon oxide, ethylene, propylene, does not adsorb any larger molecular than 4A, and often used as desiccant in industries.Typical ... size for 13A is about 10A.it can adsorb any molecular smaller than 10A, mainly used as catalyze carrier, ... of IG windows.Packing:Carton or iron drum Molecular Sieves