Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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A Study on the Remanufacturing of the Waste Three-way Catalysts

폐삼원촉매의 재제조에 관한 연구

  • Huh, Been (RIC/NMR, Kongju National University) ;
  • Park, Hea-Kyung (Department Chemical Engineering, Hanseo University) ;
  • Lee, Choul-Ho (Department of Chemical Engineering, Kongju National University)
  • 허빈 (공주대학교 자원재활용신소재지역혁신센터) ;
  • 박해경 (한서대학교 화학공학과) ;
  • 이철호 (공주대학교 화학공학부)
  • Published : 2009.09.30
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Abstract

Waste three-way catalysts were remanufactured by ultrasonic wave treatment followed by active component re-impregnation and the catalytic activities and surface properties of remanufactured catalysts were measured at various remanufacturing conditions. In case of the catalyst prepared by ultrasonic wave cleaning, the optimal period for elimination of surface contaminants from the waste catalyst was found to be about 5 minutes. The proper re-impregnation amounts of the active components for the best catalytic performance were investigated and the catalytic performance tests were also carried out with various temperature for the total hydrocarbon (THC), carbon monoxide (CO) and nitrogen oxides (NOx) conversions. The experimental results showed that the catalytic performances of the remanufactured catalysts were recovered almost the same level as those of the fresh catalyst except those of the NOx conversion.

폐삼원촉매를 초음파세척 후 활성성분을 재함침하여 촉매를 재제조 하였으며 여러가지 조건에서 재제조한 촉매의 활성과 표면특성을 분석하였다. 초음파세척을 통해 재제조한 경우, 폐촉매 표면의 오염물질을 제거하는 데에 필요한 최적시간은 약 5분임을 알 수 있었다. 활성성분의 적절한 재함침량에 대하여 검토하였으며 탄화수소화합물(THC), 일산화탄소(CO), 및 질소산화물(NOx)의 전환활성을 확인하기 위하여 다양한 온도범위에서 촉매의 성능실험을 수행하였다. 실험결과로부터 NOx 전환활성을 제외한 THC 및 CO의 전환환성은 신촉매의 전환활성과 거의 같은 수준까지 회복되는 것을 알 수 있었다.

Keywords

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