Imidazolium-Functionalized Poly(ether sulfone)as a Novel Polymeric Membrane for CO2 /CH4 Separation

By : Shaobo Fu, Tengyang Zhu, Feilong Pan, Jujie Luo

Page No: 719-732

Abstract
A series of novel gas separation membranes based on poly(ether sulfone)s were successfully synthesized via polycondensation, brominated and methyl imidazolium functionalization reactions. The structures and properties of this series, as well as the gas separation properties of the corresponding polymer membranes, were studied. The permeability and selectivity of the membranes were studied at different temperatures of 25-55°C and pressures of 0.5-1.5 atm, using single gases CO2 and CH4 . Gas-permeation measurements showed that copolymers with different content of imidazoliumionic groups exhibited different separation performances. For example, the membrane from MIPESF-c showed better performance in terms of ideal selectivity over the other two copolymers membranes. The highest ideal CO2 /CH4 selectivity was 34.5 with CO2 permeability18.5 barrer at 1.5 atm and 25°C.

Authors :
Shaobo Fu, Tengyang Zhu, Feilong Pan and Jujie Luo  : College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China.