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 language | English (US) |
|---|---|
| Pages (from-to) | 229-233 |
| Number of pages | 5 |
| Journal | Journal of Membrane Science |
| Volume | 132 |
| Issue number | 2 |
| DOIs | |
| State | Published - Sep 3 1997 |
All Science Journal Classification (ASJC) codes
- Biochemistry
- General Materials Science
- Physical and Theoretical Chemistry
- Filtration and Separation
Keywords
- Composite membranes
- Fiber membranes
- Gas and vapor permeation
- Microporous and porous membranes
- Vapor absorption and stripping