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

Document Type

Article

Publication Date

9-3-1997

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.

Identifier

0031551430 (Scopus)

Publication Title

Journal of Membrane Science

External Full Text Location

https://doi.org/10.1016/S0376-7388(97)00070-7

ISSN

03767388

First Page

229

Last Page

233

Issue

2

Volume

132

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