Silver ionic modification in dual-layer hollow fiber membranes with significant enhancement in CO2/CH4 and O2/N2 separation

Yi Li; Tai Shung Chung

doi:10.1016/j.memsci.2009.12.032

Silver ionic modification in dual-layer hollow fiber membranes with significant enhancement in CO₂/CH₄ and O₂/N₂ separation

Yi Li, Tai Shung Chung^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

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.

Original language	English (US)
Pages (from-to)	226-231
Number of pages	6
Journal	Journal of Membrane Science
Volume	350
Issue number	1-2
DOIs	https://doi.org/10.1016/j.memsci.2009.12.032
State	Published - Mar 15 2010
Externally published	Yes

Keywords

Affinity
Dual-layer hollow fiber membranes
Electrostatic crosslinking
Gas separation
Silver ionic modification

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

Access to Document

10.1016/j.memsci.2009.12.032

Cite this

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title = "Silver ionic modification in dual-layer hollow fiber membranes with significant enhancement in CO2/CH4 and O2/N2 separation",

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 {\AA} 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.",

keywords = "Affinity, Dual-layer hollow fiber membranes, Electrostatic crosslinking, Gas separation, Silver ionic modification",

author = "Yi Li and Chung, {Tai Shung}",

year = "2010",

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doi = "10.1016/j.memsci.2009.12.032",

language = "English (US)",

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journal = "Journal of Membrane Science",

issn = "0376-7388",

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TY - JOUR

T1 - Silver ionic modification in dual-layer hollow fiber membranes with significant enhancement in CO2/CH4 and O2/N2 separation

AU - Li, Yi

AU - Chung, Tai Shung

PY - 2010/3/15

Y1 - 2010/3/15

N2 - 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.

AB - 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.

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KW - Electrostatic crosslinking

KW - Gas separation

KW - Silver ionic modification

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