Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Synthesis of Low-Priced Catalyst from Coal Fly Ash for Pyrolysis of Waste Low Density Polyethylene

석탄비산재(石炭飛散災)로부터 저밀도(低密度) 폴리에틸렌 폐기물(廢棄物) 열분해용(熱分解用) 저가(低價) 촉매(觸媒) 합성(合成)

  • Jeong, Byung-Hwan (Energy Conversion Research Department, Korea Institute of Energy Research) ;
  • Na, Jeong-Geol (Energy Conversion Research Department, Korea Institute of Energy Research) ;
  • Kim, Sang-Guk (Energy Conversion Research Department, Korea Institute of Energy Research) ;
  • Mo, Se-Young (Department of Environmental Engineering, Chungbuk National University) ;
  • Chung, Soo-Hyun (Energy Conversion Research Department, Korea Institute of Energy Research)
  • 정병환 (한국에너지기술연구원 에너지전환연구부) ;
  • 나정걸 (한국에너지기술연구원 에너지전환연구부) ;
  • 김상국 (한국에너지기술연구원 에너지전환연구부) ;
  • 모세영 (충북대학교 환경공학과) ;
  • 정수현 (한국에너지기술연구원 에너지전환연구부)
  • Published : 2007.04.27
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Abstract

A low-priced catalyst for pyrolysis of LDPE has been synthesized. Fly ash, which is waste material generated from coal-fired power plants was used as silica and alumna sources for solid acid catalyst. Amorphous silica-alumina catalysts (FSAs) were pre-pared by dissolution of silica and alumina from fly ash, followed by co-precipitation of the dissoluted ions. A series of LDPE pyrolysis were carried out in a thermogravimetric analyzer to investigate the effects of synthesis conditions such as NaOH/fly ash weight ratio and activation time one catalytic performance of FSAs. The physical properties of FSAs were examined and related to their catalytic performances. FSA(1.2-8) synthesized with NaOH/fly ash weight ratio of 1.2 and the activation time of 8 hours showed the best catalytic performance. The catalytic performance of FSA(1.2-8) was comparable with that of commercial catalysts and it was concluded that the FSA could be a good candidate for catalytic use in the recycling of waste polyolefins.

석탄화력발전소에서 부산물로 발생하는 비산재를 이용하여 저밀도 폴리에틸렌 열분해용 저가 크래킹 촉매를 합성하였다. 석탄비산재에 포함되어 있는 실리카와 알루미나를 NaOH와의 융합을 통해 용출시키고 이를 공침시킴으로써 비정질 실리카알루미나 촉매로 합성하였다. NaOH/석탄비산재 중량비와 활성화 시간 등의 합성조건이 촉매 합성에 미치는 영향을 살펴보기 위하여 열중량분석기를 사용하여 저밀도 폴리에틸렌 촉매 열분해를 수행하였다. 열분해 온도 변화와 열분해 생성물의 비점분포를 분석하여 합성 촉매의 성능을 평가하였으며 합성된 촉매의 물리적 특성과 촉매 활성간의 관계를 고찰하였다. NaOH/석탄비산재의 중량비가 1.2이고 활성화 시간이 8시간일 때 합성된 촉매가 가장 우수한 성능을 나타내었다. 최적 조건에서 합성된 촉매는 상용촉매와 유사한 활성을 나타내어 우수한 효과를 나타내었으며 폐플라스틱 재활용에 효과적으로 사용할 수 있으리라 예측된다.

Keywords

References

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