Discussion on the Potential of Extracting XAI from LNG Tail Gas in Sichuan Basin
With the impact of the Russia-Ukraine war,the price of XAI(helium)continues to rise,and over 90%of domestic XAI relies on imports.Tight gas and shale gas in the Sichuan Basin contain trace amounts of associated XAI,and the content of XAI is high in BOG of LNG plants.The crude XAI in BOG can be processed by cryogenic membrane separation,pressure swing adsorption,and other processes to produce high-purity XAI products.By integrating the available XAI resources in the tail gas of the LNG plant in the Sichuan Basin,and conducting research and demonstration on the eco-nomic applicability of dehydrogenation+pressure swing adsorption+low-temperature refining process,it is believed that the project is very necessary,which is economically feasible and in line with the na-tional policy of supporting the clean energy utilization of natural gas.It can provide XAI resources and technical support for major national strategic projects.
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