Ethylene and propylene are the most important feedstock in the petrochemical industry. Large quantities of these light olefins are used in the production of plastics and chemicals. Ethylene and Propylene are produced by different methods, such as steam cracking, catalytic cracking and dehydrogenation of paraffins. Separation of olefin-paraffins mixture is great significance in petrochemical industry and currently performed by cryogenic distillation, which is expensive and energy intensive duo to the low relative volatilities of the components. Polymeric membrane separations have been considered as an attractive alternative because of low energy consumption, low capital investment and simple operation. In the last decades improving the performance of polymeric membranes for example by adding inorganic nanofillers is one of the predominant concerns of the researchers. In the present work, the separation of ethylene/ethane and propylene/propane by polysulfone-nanoporous graphene nanocomposite membranes were studied. , the nanoporous graphene prepared via a one-pot hydrothermal treatment added to polysulfone to achieve a nanocomposite membrane for the separation of ethylene/ethane and propylene/propane. The prepared membranes were characterized using FT-IR, SEM and XRD methods. The results demonstrate a nano-scale distribution of nanoporous grapheme articles in the polymer matrix. The performance of prepared membranes in ethylene/ethane and propylene/propane separation were measured at
