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Strength and conversion characteristics of DeNOx catalysts with the addition of dispersion agent

분산제 첨가에 따른 탈질촉매의 강도세기 및 전환특성

  • Lee, Hyun Hee (Department of Environmental Energy Systems Engineering, Kyonggi University) ;
  • Park, Kwang Hee (R&D Center, Alantum Corp.) ;
  • Cha, Wang Seog (Department of Environmental Engineering, Kunsan National University)
  • 이현희 (경기대학교 환경에너지시스템공학과) ;
  • 박광희 ((주)알란텀연구센터) ;
  • 차왕석 (군산대학교 환경공학과)
  • Received : 2013.08.29
  • Accepted : 2013.12.05
  • Published : 2013.12.31

Abstract

Various modified SCR catalysts were prepared and tested to improve the strength of catalysts for use under severe conditions. The SCR catalysts were modified with a binder and dispersion agent, and tested at the fixed bed reactor. FT-IR and $H_2$-TPR were used to analyze the degree of hydrogen use and ammonia adsorption by the modified catalysts. In the case of the SCR catalysts coated with 2.3g of the binder, 4.7g of ethanol, and 0.1g of dispersion agent, the strength of catalyst was increased by approximately 12%. On the other hand, despite the enhancement of strength, the activities of the SCR catalysts were decreased by 2-10%. When the mixed solution composed of binder, dispersion agent and $SiO_2$ solution was precipitated on the catalyst, the $NO_x$ conversion of the catalyst was decreased slightly. The Bronsted acid site and Lewis acid site worked as the activators for the SCR reaction, and were decreased by $SiO_2$.

Keywords

binder;dispersion agent;$NO_x$ conversion;$SiO_2$;strength of catalyst

Acknowledgement

Supported by : 지식경제부

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