Abstract
An electrothermal-swing adsorption system was demonstrated on the bench scale for capture and recovery of organic vapors from air streams. Methyl propyl ketone (MPK), methyl ethyl ketone, n-hexane, acetone, and methylene chloride were removed and recovered at 200-1,020 ppm, in a 40.0 slpm air stream while using activated carbon fiber cloth (ACFC) adsorbent. Removal efficiencies were greater than 99.9%. Liquid recovery fractions increased with increasing relative pressure, ranging from 0.11 for methylene chloride (P/Psat=2.1 × 10-3) to greater than 0.80 for MPK (P/Psat= 2.2 × 10-2). The electrical energy consumed during regeneration per mol of liquid organic compound recovered decreased with increasing relative pressure of the inlet gas stream, ranging from 4,698 kJ/mol for methylene chloride to 327 kJ/mol for MPK. Equilibrium ACFC adsorption capacity, throughput ratio, and length of unused bed were also evaluated. These results are encouraging for the development of a new technology to capture and readily recover a wide range of organic vapors from air streams.
Original language | English (US) |
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Pages (from-to) | 268-275 |
Number of pages | 8 |
Journal | Journal of Environmental Engineering |
Volume | 130 |
Issue number | 3 |
DOIs | |
State | Published - Mar 2004 |
Keywords
- Activated carbon filters
- Adsorption
- Air pollution
- Chlorides
- Regeneration
- Volatile organic chemicals
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Civil and Structural Engineering
- General Environmental Science