Korean Chemical Engineering Research

  • 제50권5호
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  • Pages.772-777
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  • 2012
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  • 0304-128X(pISSN)
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  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
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SCR 공정에서 Calcium 성분이 V2O5/TiO2 촉매 활성에 미치는 영향

Effects of Calcium on the Activity of V2O5/TiO2 Catalysts in SCR Processes

  • 김진길 (충남대학교 화학공학과) ;
  • 박광희 (경기대학교 일반대학원 환경에너지시스템 공학과) ;
  • 홍성창 (경기대학교 일반대학원 환경에너지시스템 공학과) ;
  • 이의동 (하나검사기술(주)) ;
  • 강용 (충남대학교 화학공학과)
  • Kim, Jin-Kil (Department of Chemical Engineering, Chungnam National University) ;
  • Park, Kwang-Hee (Department of Environmental Energy Systems Engineering, Graduate school of Kyonggi University) ;
  • Hong, Sung-Chang (Department of Environmental Energy Systems Engineering, Graduate school of Kyonggi University) ;
  • Lee, Eui-Dong (HANA I&E) ;
  • Kang, Yong (Department of Chemical Engineering, Chungnam National University)
  • 투고 : 2012.03.08
  • 심사 : 2012.06.20
  • 발행 : 2012.10.01
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초록

장기간 운전되는 선택적 촉매 반응공정(SCR Process)에서 $V_2O_5/TiO_2$ 촉매의 활성저하에 미치는 요소들에 대해 고찰하였다. $V_2O_5/TiO_2$ 촉매의 활성은 공정이 8개월 정도 운전되었을 때 급격히 감소하였다. ICP-AES 분석결과, 공정에서 사용된 $V_2O_5/TiO_2$ 촉매의 활성이 저하되는 것은 선택적 촉매반응공정에서 환원제로 요소용액에 첨가된 칼슘성분에 기인되는 것으로 사료되었다. $NH_3$-TPD 실험결과, 칼슘성분과 같은 강한 염기성 성분은 촉매의 산도에 매우 큰 영향을 미치는 것으로 나타났다. 이와 같은 결과로 비록 농도가 매우 적은 범위라도 칼슘성분이 선택적 촉매 반응공정에서 촉매의 활성도 저하의 원인이 되는 것으로 사료되었다.

Factors acting on the deactivation of $V_2O_5/TiO_2$ catalysts were investigated in the selective catalytic reduction(SCR) process for long term operation. The activity of $V_2O_5/TiO_2$ catalysts was decreased rapidly after 8 months from the starting of operation in the selective catalytic reaction processes. From ICP-AES analysis, the deactivation of the used catalysts could be caused from the calcium component included in urea solution as a reducing agent. It was found from the $NH_3$-TPD experiments that the strong basic element like Ca component drastically affected the acidity of the $V_2O_5/TiO_2$ catalyst. The results gave an explanation on the reason why the component of Ca, even though its concentration is very low, could lead to the deactivation of $V_2O_5/TiO_2$ catalyst in the selective catalytic reaction processes.

키워드

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피인용 문헌

  1. Catalyst vol.52, pp.4, 2014, https://doi.org/10.9713/kcer.2014.52.4.443