Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Catalytic Deep Oxidation of Volatile Organic Compound Toluene over CuO/γ-Al2O3 Catalysts at Lower Temperatures

CuO/γ-Al2O3 촉매상에서 휘발성 유기화합물 톨루엔의 저온산화

  • Kim Sang-Hwan (Department of Chemical Engineering, Konkuk University) ;
  • Kim Jae-Sik (Department of Chemical Engineering, Konkuk University) ;
  • Yang Hee-Sung (Department of Chemical Engineering, Konkuk University) ;
  • Y Vu Trinh Nhu (Department of Chemical Engineering, Konkuk University) ;
  • Park Hyung-Sang (Department of Chemical Engineering, Sogang University)
  • 김상환 (건국대학교 공과대학 화학공학과) ;
  • 김재식 (건국대학교 공과대학 화학공학과) ;
  • 양희성 (건국대학교 공과대학 화학공학과) ;
  • 브트린뉴이 (건국대학교 공과대학 화학공학과) ;
  • 박형상 (서강대학교 공과대학 화학공학과)
  • Published : 2007.02.28
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Abstract

The catalytic activity of transition metals (Cu, Co, Mn, Fe and Ni) supported on ${\gamma}-Al_2O_3$ for the oxidation of toluene was investigated in the microreactor of fixed-bed type. The catalytic activity of transition metals for the oxidation of toluene turned out to be increasing in the order of Ni$Cu/{\gamma}-Al_2O_3$ catalysts for the oxidation of toluene increased with the increasing loadings of copper, reached the maximum activity at 5% loadings of copper, and decreased with higher loadings of copper in the catalysts. The activity of $Cu/{\gamma}-Al_2O_3$ catalysts for the oxidation of toluene decreased with the increasing calcination temperatures. This might result from the decreasing surface area of catalysts due to the sintering of copper oxide as well as ${\gamma}-Al_2O_3$ supports. The 5wt% $Cu/{\gamma}-Al_2O_3$ catalysts calcined at $400^{\circ}C$ for 4 hrs in the air showed the highest activity for the oxidation of toluene. Mutual inhibition was observed for the binary mixture of toluene and xylene. The activity of the easy-to-oxidize toluene was greatly decreased while the difficult-to-oxidize xylene was slightly decreased in the binary mixture of toluene and xylene. It might suggest that the inhibition of toluene and xylene in the binary mixture resulted from the competitive adsorption for the adsorbed oxygen on the catalytic surface.

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