| 초록 |
During the last decade, ZIF-8 membranes have demonstrated their potential as promising molecular sieves for propylene/propane separation based on their intrinsic ultramicroporous features with exceptional thermal and chemical stability. Although propylene/propane separation is very important in the petrochemical industry, conventional separation processes such as adsorption and cryogenic distillation require high energy consumption. However, membrane-based processes can significantly reduce this energy consumption. In this study, ZIF-8 membrane was synthesized through a simple and feasible secondary growth method in presence of sodium formate. After dip-coating, the seed layer was modified by sodium formate which was found to promote the intergrowth of ZIF-8 crystals. The resulting ZIF-8 membrane showed consistent propylene/propane separation factors as high as 115 and propane permeance of 0.18*10-10 mol/m2/s/Pa. This suggests a great potential in applications for industrial gas separation. |
