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

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


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

Bibliographical note

Funding Information:
This research was supported by a grant (BC1-108) from Carbon Dioxide Reduction and Sequestration Research Center, one of the 21st Century Frontier Programs funded by the Ministry of Science and Technology of the Korea government.

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • General Materials Science
  • Physical and Theoretical Chemistry
  • Filtration and Separation


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