Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Decomposition of Volatile Organic Compounds Using Regenerated Metal Oxide Catalysts

폐 산업용 금속산화물계 촉매를 이용한 휘발성유기화합물의 제거

  • Nam Seung-Won (Department of Environmental Education, Mokpo National University) ;
  • Shim Wang-Geun (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Kim Sang-Chai (Department of Environmental Education, Mokpo National University)
  • 남승원 (목포대학교 환경교육과) ;
  • 심왕근 (전남대학교 응용화학공학부) ;
  • 김상채 (목포대학교 환경교육과)
  • Published : 2006.08.01
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Abstract

Catalytic oxidation of benzene, toluene and xylene (BTX) using regenerated metal oxide catalysts (ZnO-CuO, NiO, $Fe_2O_3$, ZnO, CrO) were investigated in a fixed bed flow reactor to evaluate their feasibility for the purpose of removing volatile organic compounds (VOCs). Four kinds of pre-treatment methods such as gas (air and hydrogen), acid aqueous solution, alkali aqueous solution and cleaning agent were used to find out the optimal regeneration conditions. The physico-chemical properties of the used and regenerated catalysts were characterized by BET and TPR (Temperature Programmed Reduction). The used catalysts showed high conversion ratio and the catalytic ability of toluene oxidation was in the order of ZnO-CuO>$Fe_2O_3$>NiO>ZnO>CrO. We found that the acid aqueous pre-treatment (0.1 N HNO$_3$) was the best way to enhance the catalytic activity of $Fe_2O_3$. In addition, air and hydrogen gas treatment were optimal for NiO and ZnO-CuO catalysts, respectively. Furthermore, the decomposition of BTX depends on the type of a catalyst and a gas molecule.

Keywords

References

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