Ultra-thin skin carbon hollow fiber membranes for sustainable molecular separations |
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Authors: | Chen Zhang Rachana Kumar William J Koros |
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Affiliation: | School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia |
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Abstract: | A transformative platform is reported to derive ultra-thin carbon molecular sieve (CMS) hollow fiber membranes from dual-layer precursor hollow fibers with independently tuned skin layer and substrate properties. These ultra-thin CMS hollow fiber membranes show attractive CO2/CH4 separation factors and excellent CO2 permeances up to ~1,400% higher than state-of-the-art asymmetric CMS hollow fiber membranes. They provide a unique combination of permeance and selectivity competitive with zeolite membranes, but with much higher membrane packing density and potentially much lower costs. |
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Keywords: | carbon molecular sieve membranes hollow fiber membranes molecular separations natural gas purification ultra-thin membranes |
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