Modification of PES/PU membrane by supercritical CO2 to enhance CO2/CH4 selectivity: Fabrication and correlation approach using RSM

Misagh Ahmadi; Sara Masoumi; Shadi Hassanajili; Feridun Esmaeilzadeh

doi:10.1016/j.cjche.2017.11.018

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Modification of PES/PU membrane by supercritical CO₂ to enhance CO₂/CH₄ selectivity: Fabrication and correlation approach using RSM

Separation Science and Engineering | Updated：2026-01-06

- Modification of PES/PU membrane by supercritical CO₂ to enhance CO₂/CH₄ selectivity: Fabrication and correlation approach using RSM
- Modification of PES/PU membrane by supercritical CO₂ to enhance CO₂/CH₄ selectivity: Fabrication and correlation approach using RSM
- 中国化学工程学报（英文版） 2018年26卷第12期页码：2503-2515
- Affiliations：
  
  Chemical and Petroleum Engineering School, Shiraz University, 4 Shiraz,Iran,71348-5115
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.11.018
  中图分类号：
- 纸质出版：2018
- Accepted：
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Misagh Ahmadi, Sara Masoumi, Shadi Hassanajili, 等. Modification of PES/PU membrane by supercritical CO₂ to enhance CO₂/CH₄ selectivity: Fabrication and correlation approach using RSM[J]. 中国化学工程学报（英文版）, 2018,26(12):2503-2515. DOI: 10.1016/j.cjche.2017.11.018.

to enhance CO
Misagh Ahmadi, Sara Masoumi, Shadi Hassanajili, 等. Modification of PES/PU membrane by supercritical CO₂ to enhance CO₂/CH₄ selectivity: Fabrication and correlation approach using RSM[J]. 中国化学工程学报（英文版）, 2018,26(12):2503-2515. DOI: 10.1016/j.cjche.2017.11.018. DOI：

to enhance CO DOI： 10.1016/j.cjche.2017.11.018.

摘要

Abstract

Integrally skinned asymmetric gas separation membranes of polyethersulfone (PES)/polyurethane (PU) blend were prepared using supercritical CO

(SC-CO

) as a nonsolvent for the polymer solution. The membrane consisted of a dense and a porous layer

which were conjoined to separate CO

from CH

. The FTIR

DSC

tensile and SEM tests were performed to study and characterize the membranes. The results revealed that an increase in SC-CO

temperature causes an increment in permeance and a decrease in membrane selectivity. Furthermore

by raising the pressure

both permeance and selectivity increased. The modified membrane with SC-CO

had much higher selectivity

about 5.5 times superior to the non-modified membrane. This higher selectivity performance compared to previous works was obtained by taking the advantages of both using partial miscible blend polymer due to the strong polar-polar interaction between PU PES and SC-CO

to fabricate the membrane. The response surface methodology (RSM) was applied to find the relationships between several explanatory v

ariables and CO

and CH

permeance and CO

/CH

selectivity as responses. Finally

the results were validated with the experimental data

which the model results were in good agreement with the available experimental data.

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