Fabrication of SPPEK-P/PPBES composite membranes for water vapor/N2 separation at high temperature

• Published in: Journal of materials science 2022-12, Vol.57 (45), p.21251-21264
• Main Authors: Wang, Danhui, Zhang, Shouhai, Pan, Yuxi, Xu, Peiqi, Wu, Kaiwen, Wang, Zhaoqi, Li, Zhansheng, Jian, Xigao
• Format: Article
• Language: English
• Subjects: Biopolymers; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Coal-fired power plants; Crystallography and Scattering Methods; Curing; Dehumidification; Flue gas; Gas separation; Glycerol; High temperature; Humidity; Ion exchange; Ketones; Laboratories; Materials Science; Membranes; Operating temperature; Permeability; Polymer Sciences; Polymers; Polymers & Biopolymers; Scanning electron microscopy; Selectivity; Solid Mechanics; Solvents; Spectrum analysis; Thin films; Water vapor
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-022-07937-8

Sulfonated poly(phthalazinone ether ketone) containing pendant phenyl moieties (SPPEK-P)/copoly(phthalazinone biphenyl ether sulfone) (PPBES) thin film composite (TFC) membranes used for water vapor dehumidification at high temperature were fabricated. The laboratory-scale mixture gas separation apparatus was used to estimate the water vapor permeability and water vapor/N 2 selectivity. The TFC membranes were prepared by the casting method. The influences of coating concentration, ion exchange capacity (IEC), curing time and curing temperature on the water vapor permeability and selectivity of TFC membrane were investigated. FTIR, AFM and SEM were used to characterize the membranes. At an IEC of 1.54 mmol g −1 , the membrane showed water vapor permeance of 1225 GPU and water vapor/N 2 selectivity of 450. Furthermore, the operating temperature increased from 30 to 110 °C, the water vapor permeability increased 35.5%, and selectivity increased 35.6%. Graphical Abstract