A review on the recent advances in mixed matrix membranes for gas separation processes

Gas separation processes are amongst the most important operations in the refineries and gas-related industries. Recently, many efforts are being dedicated towards modifying the gas separation properties of existing polymers to further expand their use for extensive industrial gas separation applications. Mixed matrix membranes (MMMs), which are organic–inorganic hybrid membranes, have been proposed as the alternative approach to intensify the comprehensive gas separation performance of the polymeric membranes. In this regard, we analyze and review the recent scientific and technological advances in the development of MMM's, including the emerging class of inorganic fillers like two-dimensional (2D)materials, that have been the focus of much recent work for gas separation. The review also discusses the current issues associated with the filler materials and further provides an outline to overcome the emerging challenges for the future development of high performance MMMs.