화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.74, 103-107, June, 2019
DOI10.1016/j.jiec.2019.02.009  Export Citation
Effect of temperature on separation performance in ionic liquid/Ag nanocomposite membranes for olefin/paraffin mixtures
Jung Hyun Lee, P. Sudhager1, Younghyun Cho2, †, and Sang Wook Kang3, †
  • Department of Separation and Conversion Materials Research, Korea Institute of Energy Research, Daejeon 34129, Republic of Korea
  • 1Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
  • 2Department of Energy Systems Engineering, Soonchunhyang University, Asan, 31538, Republic of Korea
  • 3Department of Chemistry and Energy Engineering, Sangmyung University, Seoul 03016, Republic of Korea
E-mail:,
Nanocomposite membranes consisting of silver nanoparticles dispersed in ionic liquid such as 1-butyl-3- methylimidazolium tetrafluoroborate (BMIM+BF4 -) were prepared and tested for the separation of olefin/paraffin mixtures. Here, we report the effects of high temperature heat treatment on the dispersion of silver nanoparticles in ionic liquids and their separation performance for propylene/ propane mixtures. When a 1:0.2 weight ratio of BMIM+BF4 -/Ag metal composite membrane was heated at 100 °C, both the selectivity and the mixed gas permeance increased from 8.2 to 17 and from 0.8 to 1.1 GPU, respectively. The enhanced separation performance is attributable to the increased surface area of the silver nanoparticles resulting from the disentanglement of nanoparticles by the interactions between the particle surfaces and the ionic liquid. The average particle size of disentangled silver nanoparticles is about 5 nm, as confirmed by transmission electron microscopy (TEM). FT-Raman and X ray photoelectron spectroscopy (XPS) also demonstrated favorable interactions between the silver nanoparticle surfaces and the counter anions of the ionic liquid. The influence of heat treatment on Ag particle dispersion in ionic liquid was studied by small angle X-ray scattering (SAXS) analysis.
Keywords:Silver metal;Heat treatment;Ionic liquid;Facilitated transport;Membrane
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