Clean Technology, Vol.22, No.2, 114-121, June, 2016
V/TiO2 촉매의 제조조건에 따른 SCR 반응활성 및 SO2 내구성 증진에 대한 연구
SCR Reaction Activity and SO2 Durability Enhancement in Accordance with Manufacturing Conditions of the V/TiO2 Catalysts
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초록
본 연구에서는, 연소로에서 발생하는 질소산화물을 제거하기 위한 V/TiO2 촉매의 제조조건에 따른 SCR 반응활성 및 SO2 내구성 증진 연구를 수행하였다. 제조된 촉매들은 XPS, Raman, H2-TPR, SO2-TPD를 이용하여 특성분석을 수행하였다. 촉매활성 및 SO2 내구성을 고려하였을 때 바나듐 함량은 2 wt%가 최적이었다. 텅스텐을 promotor로 첨가하였을 경우, 저온에서의 환원능력의 증진과 SO2 흡착량 감소로 인하여 우수한 반응활성과 SO2 내구성을 나타내었다. 또한 촉매 제조 시 바나듐 용액의 pH가 낮아질수록 촉매표면에 형성되는 바나듐이 고분산되어 표면 crystalline V2O5 종의 형성을 억제하였고, 이로 인해 우수한 반응활성을 나타내었다. CO에 대한 내구성도 우수하여 CO가 발생하는 연소로에서도 사용가능 함을 확인하였다.
In this studies, SCR reaction activity and SO2 durability enhancement study on manufacturing conditions of the V/TiO2 catalyst was carried out for the removal of nitrogen oxides generated in the combustion furnace. The catalysts are characterized by XPS, Raman, H2-TPR and SO2-TPD. When the vanadium was contained of 2 wt%, it showed excellent SO2 durability and catalytic activity. and When the tungsten is added as a promotor, the enhancement of reducing ability at a low temperature and reduction of SO2 adsorption capacity improved the reaction activity and SO2 durability. V/W/TiO2 are prepared by the lower pH of vanadium solution, vanadium was highly dispersed on the surface and inhibited the formation of crystalline V2O5. in addition, it was confirmed that this catalyst can be used as excellent resistance to high concentration of CO in the combustion furnace.
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