Type 13X is used commercially for general gas drying, air plant feed purification (simultaneous removal of H2O and CO2) and liquid hydrocarbon and natural gas sweetening (H2S and mercapstan removal). All molecules which can be adsorbed on molecular sieves 3A, 4A and 5A can be adsorbed on Type 13X. In addition,Type 13X can adsorb molecules of larger critical diameters, such as aromatics and branched-chain hydrocarbons.