A hybrid of vapor permeation and membrane-based absorption-stripping for VOC removal and recovery from gaseous emissions

Tarun K. Poddar, Kamalesh K. Sirkar

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

A hybrid process that combines a vapor permeation process with a recently developed membrame-based absorption and stripping process using an inert essentially nonvolatile absorbent oil is described here for a very high degree of removal of volatile organic compounds (VOCs) from vented gas streams. The combined and continuous process of this study uses the same utility, a vacuum pump, and achieves a very high level of VOC removal, for example, 99.57-99.97% from N2 feed stream containing 6000 ppmv of methylene chloride. The performance is illustrated here using hollow fiber membrane modules of two kinds: microporous polypropylene hollow fibers having an ultrathin nonporous silicone coating used for vapor permeation first and then later for regenerating the VOC-loaded absorbent by VOC stripping via vacuum; microporous polypropylene hollow fibers without any nonporous coating for nondispersive absorption of VOCs from the waste gas stream.

Original languageEnglish (US)
Pages (from-to)229-233
Number of pages5
JournalJournal of Membrane Science
Volume132
Issue number2
DOIs
StatePublished - Sep 3 1997

All Science Journal Classification (ASJC) codes

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

Keywords

  • Composite membranes
  • Fiber membranes
  • Gas and vapor permeation
  • Microporous and porous membranes
  • Vapor absorption and stripping

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