High H2 permeable SAPO-34 hollow fiber membrane for high temperature propane dehydrogenation application |
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| Authors: | Zhigang Wang Jeff Xu Subhasis Pati Tianjia Chen Yuzhen Deng Nikita Dewangan Lie Meng Jerry Y.S. Lin Sibudjing Kawi |
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| Affiliation: | 1. Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore;2. Chemical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona, USA |
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| Abstract: | SAPO-34 hollow fiber zeolite membranes are successfully synthesized on α-Al2O3 hollow fiber ceramic substrates by secondary growth method, and used to separate H2 from a binary mixture (H2, C3H8) or ternary mixture (H2, C3H8, and C3H6) under a wide temperature range (25–600°C) with the aim of using them for propane dehydrogenation (PDH) reactions at high temperature. The results show excellent performance for H2/C3H8 and H2/ C3H8 & C3H6 separation, with high H2 permeance of 3.1 × 10−7 mol/m2/s/Pa and H2/C3H8 selectivity of 41 at 600°C. Additionally, the membrane shows stable performance for 140 hr of H2/C3H8 separation test at 600°C. The high performance of this membrane is mainly attributed to the thin (∼2 μm) zeolite layer and asymmetric-wall of the hollow fiber support. So far, this membrane offers the highest hydrogen permeation and selectivity for H2/C3H8 separation at high temperature (600°C) compared to those reported in literature. |
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| Keywords: | H2 permeation high temperature application propane dehydrogenation SAPO-34 zeolite membrane inorganic hollow fiber |
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