In the present work, membrane contactors using both porous and nonporous polymeric hollow fiber membranes with ionic liquids as absorbent were developed for precombustion CO2 capture at elevated temperature and pressures. 1-Butyl-3-methylimidazolium tricyanomethanide [Bmim][TCM] was selected as the ILs absorbent. The compatibility and stability of six different polymeric membranes were evaluated, while the porous PTFE membrane and nonporous Teflon-PP composite membrane were considered to be the most suitable membranes for this application. Both membrane configurations were tested and showed comparable separation performances: CO2 flux values of 4.86 × 10-4 and 4.75 × 10-4 mol m-2 s-1 were obtained for the porous PTFE and nonporous Teflon-PP membrane contactor at 20 bar with a gas flow rate of 200 mL min-1, respectively. The Teflon-PP composite membrane exhibited better stability as compared to the porous PTFE membrane in a 14 day test.
Bibliographical noteKAUST Repository Item: Exported on 2022-06-01
Acknowledgements: This work is supported by the Research Council of Norway through the CLIMIT program (project no. 215732/239789). Assistant professor Hongyong Zhao from Tianjin polytechnic university, Professor Suzana Nunes, and Dr. Stefan Chisca from King Abdullah University of Science and Technology are highly appreciated for providing membrane samples.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering