Application progress of MOFs membranes in hydrogen helium methane separation and purification processes
Metal-organic frameworks(MOFs)materials have great properties such as high specific surface area,adjustable porosity and high stability,so the MOFs membranes have excellent gas adsorption and desorption properties.However,current research on MOFs membrane processes faces challenges such as unclear design routes and difficulties in commercialization.Therefore,reviewing the research progress and potential applications of MOFs membranes in hydrogen,helium and methane separation and purification technologies are of significant importance.Firstly,the structural properties of MOFs materials and the application of molecular simulation in the selection and performance prediction of MOFs materials were introduced.Separation performances of MOFs membranes prepared experimentally for hydrogen,helium and methane were summarized,including the internal structure of the materials,separation mechanisms,stability,and applicable conditions.Secondly,considering that the industrial application of MOFs membranes is still in its early stages,the possible applications of these membranes in processes involving membrane separation units as well as related challenges and limiting factors,were discussed.Furthermore,an economic analysis was conducted based on case studies,exploring the replacement of traditional separation materials with MOFs membranes and the upgrading of entire processes to membrane separation technologies,revealing considerable economic benefits of adopting membrane separation technologies.Finally,in light of the excellent properties of MOFs materials,future research directions in this field were anticipated,aiming to provide a reference for the application of MOFs membranes in hydrogen,helium and methane separation and purification processes.
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