Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Study of using Waste Industrial Catalyst for the Removal of Harmful Organic Compounds

유해 유기화합물의 제거를 위한 폐 산업용 촉매의 이용에 관한 연구

  • Seo, Seong-Gyu (Department of Environmental Education, Mokpo National University) ;
  • Kim, Sang-Chai (Department of Civil & Engineering, Yosu National University)
  • 서성규 (목포대학교 환경교육과) ;
  • 김상채 (여수대학교 건설환경공학부)
  • Published : 2004.01.01
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Abstract

The catalytic oxidation of benzene, toluene and xylene over a spent industrial catalyst (Pd-based) was investigated in a fixed bed flow reactor system. According to the priming condition, the properties of a spent Pd-based catalyst were characterized by XRD(X-ray diffraction). BET(Brunauer-Emmett-Teller) and ICP(Inductively coupled plasma). When air was used as a primer, optimum priming temperature was found to be 200$^{\circ}C$, and the catalytic activity decreased as the priming temperature increased. When a spent Pd-based catalyst primed with air at 200$^{\circ}C$ was re-treated with hydrogen at 200$^{\circ}C$, 300$^{\circ}C$ or 400$^{\circ}C$, respectively, the catalytic activity increased and thermal effect were negligible. $HNO_3$ aqueous solution priming resulted in slight decrease of the catalytic activity, with little effects on $HNO_3$ concentrations. The activity of a spent Pd-based catalyst with respect to VOC molecule was observed to follow sequence: xylene> toluene> benzene. Benzene. toluene and xylene could be removed to almost 100% by a spent Pd-based catalyst primed with hydrogen.

Keywords

References

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