Highly selective facilitated transport membranes for isoprene/n-pentane separation

Hyun Woo Choi, Dong Bum Kim, Dae Ki Choi, Byeong Sung Ahn, Hong gon Kim, Hoon Sik Kim, Chang Ha Lee, Joon Yong Sung

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The composite membranes containing sulfonated poly(ether ether)ketone (SPEEK)-AgNO3 layers on top of polyester supports were prepared and tested for the separation of isoprene/n-pentane mixtures. The SPEEK-AgNO3 membranes showed good selectivity for isoprene over n-pentane and long-term stability. The performances of the SPEEK-AgNO3 membranes were significantly affected by the degree of sulfonation (DS) of SPEEK. The selectivity for isoprene over n-pentane increased with increasing DS of SPEEK. The separation of isoprene from n-pentane mixtures was also carried out using hollow fiber membranes containing SPEEK layers on top of PAN supports in a liquid-liquid membrane contactor system. The SPEEK-coated hollow fiber membranes was also effective the separation of real C5 mixture consisting of about 20 different components.

Original languageEnglish
Pages (from-to)403-409
Number of pages7
JournalJournal of Membrane Science
Issue number1-2
Publication statusPublished - 2006 Aug 1


All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this

Choi, H. W., Kim, D. B., Choi, D. K., Ahn, B. S., Kim, H. G., Kim, H. S., Lee, C. H., & Sung, J. Y. (2006). Highly selective facilitated transport membranes for isoprene/n-pentane separation. Journal of Membrane Science, 279(1-2), 403-409. https://doi.org/10.1016/j.memsci.2005.12.029