moisture will significantly increase the dew point of natural gas, causing the gas to inevitably freeze in the process of liquefaction, pipeline transportation or cryogenic separation; it can also form hydrocarbon hydrate precipitation and block equipment and pipelines; it is easier to interact with H2S and CO2 in natural gas, causing serious corrosion of pipeline equipment. Deep dehydration and drying of natural gas using molecular sieve is the most widely used and mature method.

natural gas will interact with water and severely corrode pipeline equipment; acidic natural gas whose content exceeds the national standard must be purified and desulfurized before it can be used normally. Molecular sieves have been widely used to remove H2S, CO2 and other impurities from gases.