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The preparation of SPEEK /phosphate salts membranes and application for CO 2 /CH 4 separation
Author(s) -
Lv Jianfei,
Liu Yuanyuan,
Qin Yun,
Guo Ruili,
Zhang Jianshu,
Wei Zhong
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.43399
Subject(s) - membrane , chemical engineering , selectivity , phosphate , fourier transform infrared spectroscopy , materials science , solubility , permeability (electromagnetism) , polymer , polymer chemistry , chemistry , organic chemistry , catalysis , biochemistry , engineering
SPEEK/phosphate salts membranes were prepared and utilized for CO 2 /CH 4 separation. SPEEK with abundant –SO 3 H groups and EO groups on polymer chains would be beneficial for CO 2 transport. The doped phosphate salts (NaH 2 PO 4 , Na 2 HPO 4 and Na 3 PO 4 ) with different acid‐base properties increased the water content in the membrane, and water was expected to increase both the solubility and diffusivity of CO 2 in the membrane. All membranes were characterized by FTIR, TGA, and XRD. The CO 2 permeability and CO 2 /CH 4 selectivity of SPEEK/Na 3 PO 4 membranes were higher than that of SPEEK/NaH 2 PO 4 and SPEEK/Na 2 HPO 4 membranes. Compared to the pure SPEEK membrane, the CO 2 permeability and CO 2 /CH 4 selectivity of SPEEK/Na 3 PO 4 −10 membrane were increased by 144% and 65%, respectively. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43399.