Pressure swing membrane absorption process for shifted syngas separation: Modeling vs. experiments for pure ionic liquid

John Chau, Gordana Obuskovic, Xingming Jie, Kamalesh K. Sirkar

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

We have carried out studies for CO2 removal from hot simulated pre-combustion shifted syngas by a pressure swing membrane absorption (PSMAB) process. In this cyclic separation process, a well-packed membrane module containing either hydrophobized porous ceramic tubules or hydrophobized polyether ether ketone (PEEK) porous hollow fibers was used to achieve non-dispersive gas absorption from a high-pressure feed gas into a stationary absorbent liquid on the module shell side during a certain part of the cycle followed by controlled desorption of the absorbed gases from the liquid in the rest of the cycle. Helium was used as a surrogate for H2. Separation of the feed mixture containing 40.67% CO2-He balance was done using pure ionic liquid 1-butyl-3-methylimidazolium dicyanamide ([bmim][DCA]) as the liquid absorbent. A mathematical model was developed to predict the extent of separation of the feed gas mixture into two product streams, one He-rich and the other CO2-rich over a temperature range of 25-100°C.

Original languageEnglish (US)
Pages (from-to)61-70
Number of pages10
JournalJournal of Membrane Science
Volume453
DOIs
StatePublished - Mar 1 2014

All Science Journal Classification (ASJC) codes

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

Keywords

  • CO-He separation from syngas
  • Cyclic gas absorption/desorption
  • High pressure and temperature
  • Hydrophobized hollow fibers
  • Membrane contactor

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