Please use this identifier to cite or link to this item:
Title: CO2-selective membranes for hydrogen purification and the effect of carbon monoxide (CO) on its gas separation performance
Authors: Chen, H.Z. 
Chung, T.-S. 
Keywords: Gas separation
Poly(ethylene glycol) dimethyl ether (PEGDME)
Polymer-silica hybrid matrix (PSHM)
Issue Date: Apr-2012
Citation: Chen, H.Z., Chung, T.-S. (2012-04). CO2-selective membranes for hydrogen purification and the effect of carbon monoxide (CO) on its gas separation performance. International Journal of Hydrogen Energy 37 (7) : 6001-6011. ScholarBank@NUS Repository.
Abstract: Industrial hydrogen production may prefer CO2-selective membranes because high-pressure H2 can therefore be produced without additional recompression. In this study, high performance CO2- selective membranes are fabricated by modifying a polymer-silica hybrid matrix (PSHM) with a low molecular weight poly(ethylene glycol) dimethyl ether (PEGDME). The liquid state of PEGDME and its unique end groups eliminate the crystallization tendency of poly(ethylene glycol) (PEG). The methyl end groups in PEGDME hinder hydrogen bonding between the polymer chains and significantly enhance the gas diffusivity. In pure gas tests, the membrane containing 50 wt% additive shows CO2 gas permeability and CO2/H2 selectivity of 1637 Barrers and 13 at 35 °C, respectively. In order to explore the effect of real industrial conditions, the gas separation performance of the newly developed membranes has been studied extensively using binary (CO2/H2) and ternary gas mixtures (CO2/H 2/carbon monoxide (CO)). Compared to pure gas performance, the second component (H2) in the binary mixed gas test reduces the CO 2 permeability. The presence of CO in the feed gas stream decreases both CO2 and H2 permeability as well as CO 2/H2 selectivity as it reduces the concentration of CO2 molecules in the polymer matrix. The mixed gas results affirm the promising applications of the newly developed membranes for H2 purification. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights.
Source Title: International Journal of Hydrogen Energy
ISSN: 03603199
DOI: 10.1016/j.ijhydene.2011.12.124
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Mar 21, 2019


checked on Mar 12, 2019

Page view(s)

checked on Mar 23, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.