Electrothermal adsorption and desorption of volatile organic compounds on activated carbon fiber cloth.
Adsorption is an effective means to selectively remove volatile organic compounds (VOCs) from industrial gas streams and is particularly of use for gas streams that exhibit highly variable daily concentrations of VOCs. Adsorption of such gas streams by activated carbon fiber cloths (ACFCs) and subsequent controlled desorption can provide gas streams of well-defined concentration that can then be more efficiently treated by biofiltration than streams exhibiting large variability in concentration. In this study, we passed VOC-containing gas through an ACFC vessel for adsorption and then desorption in a concentration-controlled manner via electrothermal heating. Set-point concentrations (40-900 ppm(v)) and superficial gas velocity (6.3-9.9 m/s) were controlled by a data acquisition and control system. The results of the average VOC desorption, desorption factor and VOC in-and-out ratio were calculated and compared for various gas set-point concentrations and superficial gas velocities. Our results reveal that desorption is strongly dependent on the set-point concentration and that the VOC desorption rate can be successfully equalized and controlled via an electrothermal adsorption system.
Department of Health and Environment, Kosin University, Dong Sam Dong, Young Do Gu, Busan, South Korea.
H K
HK
Son
Department of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do 627-706, South Korea. Electronic address: ssivaphd@yahoo.com.
S
S
Sivakumar
Department of Civil and Environmental Engineering, University of Illinois, Urbana, IL, USA.
M J
MJ
Rood
Construction Engineering Research Laboratory, U.S. Army Engineer Research and Development Center (ERDC-CERL), Champaign, IL, USA.
B J
BJ
Kim
D000085:Acetates / Q000737:chemistry; D000327:Adsorption; D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control; D001555:Benzene Derivatives / Q000737:chemistry; D002244:Carbon / Q000737:chemistry*; D000077482:Carbon Fiber; D004563:Electrochemistry; D006358:Hot Temperature; D013784:Textiles; D055549:Volatile Organic Compounds / Q000737:chemistry*
D000085:Acetates; D000393:Air Pollutants; D001555:Benzene Derivatives; D000077482:Carbon Fiber; D055549:Volatile Organic Compounds; C006848:butyl acetate; D002244:Carbon
Activated carbon fiber cloth; Adsorption; Desorption; Set-point concentration; Volatile organic compounds