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Title: Molecular-level mixed matrix membranes comprising Pebax® and POSS for hydrogen purification via preferential CO2 removal
Authors: Li, Y. 
Chung, T.-S. 
Keywords: CO 2-selective membranes
Hydrogen purification
Molecular-level mixed matrix membranes
Issue Date: Oct-2010
Citation: Li, Y., Chung, T.-S. (2010-10). Molecular-level mixed matrix membranes comprising Pebax® and POSS for hydrogen purification via preferential CO2 removal. International Journal of Hydrogen Energy 35 (19) : 10560-10568. ScholarBank@NUS Repository.
Abstract: The molecular-level mixed matrix membranes (MMMs) comprising Pebax ® and POSS have been developed by tuning the membrane preparation process in this work. They exhibit a simultaneous enhancement in CO2 permeability and CO2/H2 selectivity by optimizing the POSS content at extremely low loadings. This is mainly attributed to the large cavity of POSS itself and its effect on the segmental-level polymeric chain packing. More interestingly, the Pebax®/POSS MMMs reveal a much higher separation performance in the mixed gas test than that in the pure gas test. The highest CO2/H2 selectivity reaches 52.3 accompanied by CO2 permeability of 136 Barrer at 8 atm and 35 °C. This is due to the CO2-induced plasticization that improves the free volume and polymer chain mobility, hence benefiting the interaction between the polymer matrix and penetrant CO2. These features may ensure the superiority of Pebax®/POSS molecular-level MMMs as CO 2-selective membranes in the industrial application of hydrogen purification. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
Source Title: International Journal of Hydrogen Energy
ISSN: 03603199
DOI: 10.1016/j.ijhydene.2010.07.124
Appears in Collections:Staff Publications

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