Molecular-level mixed matrix membranes comprising Pebax® and POSS for hydrogen purification via preferential CO2 removal

Yi Li; Tai Shung Chung

doi:10.1016/j.ijhydene.2010.07.124

Molecular-level mixed matrix membranes comprising Pebax^® and POSS for hydrogen purification via preferential CO₂ removal

Yi Li, Tai Shung Chung^*

^*Corresponding author for this work

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

120 Scopus citations

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.

Original language	English (US)
Pages (from-to)	10560-10568
Number of pages	9
Journal	International Journal of Hydrogen Energy
Volume	35
Issue number	19
DOIs	https://doi.org/10.1016/j.ijhydene.2010.07.124
State	Published - Oct 2010
Externally published	Yes

Keywords

CO -selective membranes
Hydrogen purification
Molecular-level mixed matrix membranes
POSS
Pebax

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ijhydene.2010.07.124

Cite this

@article{db6a8d4116654dd3b693cbc23a2fdf6a,

title = "Molecular-level mixed matrix membranes comprising Pebax{\textregistered} and POSS for hydrogen purification via preferential CO2 removal",

abstract = "The molecular-level mixed matrix membranes (MMMs) comprising Pebax {\textregistered} 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{\textregistered}/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{\textregistered}/POSS molecular-level MMMs as CO 2-selective membranes in the industrial application of hydrogen purification.",

keywords = "CO -selective membranes, Hydrogen purification, Molecular-level mixed matrix membranes, POSS, Pebax",

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

year = "2010",

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journal = "International Journal of Hydrogen Energy",

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AU - Li, Yi

AU - Chung, Tai Shung

PY - 2010/10

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N2 - 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.

AB - 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.

KW - CO -selective membranes

KW - Hydrogen purification

KW - Molecular-level mixed matrix membranes

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