Abstract
본 Mn-Cu-<TEX>$TiO_2$</TEX> Civil 촉매를 이용하여 질소산화물을 제거하는 <TEX>$NH_3$</TEX>-SCR 공정에서 소성조건 및 산소농도에 대한 영향을 연구하였다. 소성된 촉매시료를 사용하여 <TEX>$H_2$</TEX>-TPR 시스템에서 반응온도에 따른 수소전환특성을 조사하였으며, 소성조건에 대한 비표면적변화도 측정하였다. 실험결과 적합한 소성온도는 약 <TEX>$300^{\circ}C$</TEX>이며, 소성온도가 <TEX>$500^{\circ}C$</TEX>이상일 경우 Mn, Cu 성분의 저온활성이 크게 감소함을 알 수 있었다. SCR반응에서 기상산소는 중요한 반응변수이며 반응에 적합한 농도는 약 8vol%이었다. DeNOx catalysts composed of Mn, Cu and <TEX>$TiO_2$</TEX> were prepared and tested for <TEX>$NH_3$</TEX>-SCR. The performance of each catalyst was studied for the NOx removal efficiency while changing the calcination temperature, reaction time, and oxygen concentration. The hydrogen conversion efficiency of a calcined catalyst was measured at the <TEX>$H_2$</TEX>-TPR system. The change in the specific surface area of catalyst according to the calcination temperature was analyzed. As a result, the proper calcination temperature was approximately <TEX>$300^{\circ}C$</TEX>. If the calcination temperature is increased to <TEX>$500^{\circ}C$</TEX>, the NOx removal efficiency of Mn and Cu constituents is largely decreased at the low temperature range. Oxygen in flue gas is an important parameter in the SCR reaction and optimal oxygen concentration is approximately 8 vol.%.
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