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Fast-current-driven synthesis of ultrathin ZIF-8 membrane on ceramic tube for propene/propane separation |
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| Authors: | Yali Zhao Xiayi Yang Jiayu Luo Yanying Wei Haihui Wang |
| Affiliation: | 1. School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China
Contribution: Data curation (supporting), Formal analysis (lead), Investigation (supporting), Writing - original draft (lead);2. School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China Contribution: Data curation (lead), Formal analysis (supporting), Investigation (supporting), Methodology (lead), Writing - original draft (supporting);3. School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China Contribution: Investigation (supporting), Writing - original draft (supporting);4. School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China;5. Beijing Key Laboratory for Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, China |
| Abstract: | MOF membranes are very promising in molecular separation, but it is still a challenge for industrial applications due to the complex and time-consuming synthesis. We use the fast current-driven synthesis (FCDS) method to achieve controlled growth of ZIF-8 membranes on porous graphite-coated ceramic tubes by controlling the growth time and current density. Grown for 30 min at a current density of 0.74 mA/cm2, the ZIF-8 membrane exhibits selectivity for C3H6/C3H8 up to 63 with C3H6 permeance of 6 × 10−9 mol/(m2 s Pa). Furthermore, the ZIF-8 membrane exhibits a pressure resistance of up to 3 bar and good stability of ~96 h. This work realizes the breakthrough of the MOF membrane synthesis via FCDS method from the frequently-used expensive and fragile anodic aluminum oxide (AAO) disc substrate to the tough ceramic tubular substrate, which broadens the road for the industrialization of MOF membranes in gas separation fields. |
| Keywords: | C3H6/C3H8 separation ceramic tube fast current-drive synthesis method membrane separation ZIF-8 membrane |