Polyethylene glycol-grafted poly(ionic liquid) membranes for CO2 separation from methane and from nitrogen

I&EC 140

Xudong Hu, huxudong@uwyo.edu1, Jianbing Tang, jianbin@uwyo.edu1, Andre Blasig, andre@uwyo.edu2, Youqing Shen, sheny@uwyo.edu1, and Maciej Radosz1. (1) Soft Materials Laboratory, Department of Chemical and Petroleum Engineering, University of Wyoming, 1000 E. University Ave., Laramie, WY 82071, (2) Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82072
ABSTRACT Polyethylene glycol (PEG) is grafted onto ionic polymers, poly[p-vinylbenzyltrimethylammonium tetrafluoroborate] (P[VBTMA][BF4]) and poly[2-(methylacryloyloxy)ethyl-trimethylammoniumtetrafluoroborate] (P[MATMA][BF4]). Membranes made of P[VBTMA][BF4]-g-PEG and P[MATMA][BF4]-g-PEG are characterized for the CO2, methane, and nitrogen permeability, diffusivity, and solubility. At the same permeability, they are found to have higher CO2 selectivity than the previous polymeric membranes for CO2/CH4 and CO2/N2 separations. The selectivity of such PEG-grafted ionic membranes is primarily due to the solubility differences, not the diffusivity differences.
 

Ionic Liquids: Not Just Solvents Anymore OR Ionic Liquids: Parallel Futures (Sponsored by Green Chemistry and Engineering, Separation Science and Technology and Novel Chemistry with Industrial Applications Sub-Divisions)
8:00 PM-10:00 PM, Sunday, 26 March 2006 Georgia World Congress Center -- Ex. Hall B4, Poster

Division of Industrial and Engineering Chemistry

The 231st ACS National Meeting, Atlanta, GA, March 26-30, 2006