Objective The aim is to use the ionic liquids to desulfurize and decarboinze the natural gas extracted from the gas field in order to meet the requirements of GB 17820-2018 Natural gas.Methods As a new type of green solvent,ionic liquids'physical and chemical properties can be regulated by anions and cations.The potential of ionic liquids to replace or supplement traditional absorption solvents for natural gas purification was discussed by combining and summarising the relevant literature of domestic and foreign scholars.Results The purification process of ionic liquids has a good effect for acid gas absorption.Although conventional and functional ionic liquids are high-viscoity and expensive,the combination of amine solvents can effectively reduce or avoid such problems.Conclusions The research progress of CO2 and H2S absorpted by ionic liquids in recent years is reviewed,which provides a valuable reference for its application in natural gas desulfurization and decarbonization.
natural gasalcohol amine solutionionic liquidsacid gas absorptiondesulfurizationdecarbonization
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