Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.memsci.2009.12.032
Title: Silver ionic modification in dual-layer hollow fiber membranes with significant enhancement in CO2/CH4 and O2/N2 separation
Authors: Li, Y. 
Chung, T.-S. 
Keywords: Affinity
Dual-layer hollow fiber membranes
Electrostatic crosslinking
Gas separation
Silver ionic modification
Issue Date: 15-Mar-2010
Source: Li, Y., Chung, T.-S. (2010-03-15). Silver ionic modification in dual-layer hollow fiber membranes with significant enhancement in CO2/CH4 and O2/N2 separation. Journal of Membrane Science 350 (1-2) : 226-231. ScholarBank@NUS Repository. https://doi.org/10.1016/j.memsci.2009.12.032
Abstract: The silver ionic modification approach and dual-layer hollow fiber spinning technology synergistically lead to the significantly enhanced O2/N2 and CO2/CH4 selectivity of 9.5 and 118, respectively, with an ultrathin dense-selective layer of 1092 Å in the pure gas measurement. Even with the presence of competition in sorption sites between two penetrants, the dual-layer hollow fiber membrane developed in this work still reveals the superior CO2/CH4 selectivity of 87.9 in the mixed gas measurement. To our best knowledge, this is the first time for the polyethersulfone (PES) material to achieve so high CO2/CH4 selectivity through the ionic modification. The electrostatic crosslinking, steric hindrance and affinity to some specific gases (e.g. O2 and CO2) induced by the incorporation of ionic groups into the PES matrix may be three dominant factors for the advanced gas separation performance in this work. © 2010 Elsevier B.V. All rights reserved.
Source Title: Journal of Membrane Science
URI: http://scholarbank.nus.edu.sg/handle/10635/90140
ISSN: 03767388
DOI: 10.1016/j.memsci.2009.12.032
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