In last few decades, membrane technology has become a great attention for gas\r\nseparation technology especially for natural gas sweetening. The intrinsic character of\r\nmembranes make it fits for process escalation and this versatility could be the significant\r\nfactor to induce membrane technology in most gas separation areas. Membranes were\r\nsynthesized with various materials which depended on the applications. The fabrication of\r\npolymeric membrane was one of the fastest growing fields of membrane technology.\r\nHowever, polymeric membranes couldn�t meet the separation performances required\r\nespecially in high operating pressure due to deficiencies problem. The chemistry and\r\nstructure of support materials like inorganic membranes were also one of the focus areas\r\nwhen inorganic membranes showed some positive results towards gas separation. Though,\r\nthe materials are somewhat lacking to meet the separation performance requirement. Mixed\r\nmatrix membrane (MMM) which comprising of polymeric and inorganic membranes presents\r\nan interesting approach for enhancing the separation performance. Nevertheless, MMM is yet\r\nto be commercialized as the material combinations are still in the research stage. This review\r\nhighlights the potential promising areas of research in gas separation by taking into accounts\r\nthe material selections and the additional of third component for conventional MMM.
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