Recent progress on mixed matrix membrane for efficient C3H6/C3H8 separation

Propylene, as one of the basic raw materials of the three major synthetic materials, has a vital position in the national economy, but the energy consumption required for separation and purification in its production process is extremely high. Mixed matrix membrane is prepared by introducing functional nanofillers into polymer matrix and can show excellent separation ability for propylene and propane. It is believed that such membranes can substantially reduce the energy consumption of propylene purification, and has become a hotspot in the field of gas separation. In this study, the effects of polymer structure on the separation performance of propylene/propane membrane are reviewed, and the important factors affecting the separation performance of propylene/propane in mixed matrix membranes is summarized. Then, the progress in propylene/propane separation mixed matrix membranes (MMMs) is reviewed based on the point view of polymer matrix and MOFs filler. The optimization method of MMMs is discussed in detail from three aspects: improving interface compatibility, regulating membrane packing structure and regulating membrane matrix structure. Finally, in view of the problems existing in the process of mixed matrix membranes for propylene/propane separation, the transport mechanism of propylene and propane molecules in mixed matrix membranes is analyzed. The future research on MMMs for propylene/propane separation is also proposed. © 2023 Chemical Industry Press. All rights reserved.