Adsorption of VOCs from Dry Cleaning

세탁소 배출 휘발성유기화합물의 흡착 제거 기술

  • Lee, Seung-Jae (Waste Energy Research Center, Korea Institute of Energy Research) ;
  • Moon, Seung-Hyun (Waste Energy Research Center, Korea Institute of Energy Research)
  • 이승재 (한국에너지기술연구원 폐기물에너지연구센타) ;
  • 문승현 (한국에너지기술연구원 폐기물에너지연구센타)
  • Received : 2009.07.02
  • Accepted : 2009.10.24
  • Published : 2009.11.30

Abstract

This study investigated a possibility to develop an adsorption process for volatile organic compounds (VOCs) of the solvent emitted during dry cleaning. Pitch activated carbon fiber (ACF) was chosen as an adsorbent of VOCs, and an electric swing adsorption process was utilized for the reproduction of the adsorbent after the completion of VOCs adsorption. Effects of ACF types and several solvents such as trichloroethylene (TCE) and toluene were examined on breakthrough curves and amounts of adsorbed VOCs. ACF was pretreated under various conditions in order to enhance the amounts of the adsorbed VOCs. Temperatures and voltages were measured for the reproduction of the ACF after full adsorption. ACF having micropores exhibited high adsorption of TCE, and high surface area of ACF could increase the adsorption property of toluene. In general, ACF could adsorb 41~54% TCE of the adsorbent weight. The increase of inlet VOCs concentration significantly decreased the breakthrough time and slightly lowered the amounts of adsorbed VOCs. Thus, ACF could effectively adsorb VOCs in low concentration in the feed stream. ACF pretreated by heat under vacuum showed excellent toluene adsorption with controlling oxygen functional groups on the ACF surface, which revealed that vacant carbon site could be the adsorption point of toluene. Most adsorbed toluene was desorbed at $150^{\circ}C$.

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