La을 기반으로 하는 다양한 페롭스카이트 촉매를 페치니(Pechini)법에 따라 제조하고, 이 촉매를 음식물 처리 과정에서 발생하는 악취 성분의 저온 산화 반응에 적용하여 효과적인 탈취가 이루어지도록 하였다. 배출 가스의 정량 및 정성 분석을 통하여 음식물 처리 시간에 따른 주요 악취 성분의 양을 조사하였다. 그리고 주요 악취 성분들로 구성된 표준 악취 시료는 산화 반응기의 반응물로 도입하였다. 먼저, 다양한 전이 금속 M이 치환된 La 기반 페롭스카이트 촉매(LaMO3: M=Cr, Mn, Fe, Co 및 Ni)를 제조하고 전이 금속 M의 영향을 알아보기 위해 악취 성분의 산화 반응에 적용한 결과, 테스트한 촉매 중에서 LaNiO3 촉매가 가장 우수한 촉매 활성을 보였다. 또한 촉매 활성을 증진시키기 위하여 Pt가 치환된 페롭스카이트 촉매(LaNi1-xPtxO3: x=0, 0.03, 0.1 및 0.3)를 제조하였고, 이로부터 LaNi0.9Pt0.1O3 촉매_x000D_ 가 가장 효율적인 촉매인 것을 알 수 있었다. 끝으로 저온 산화 반응에서의 페롭스카이트 촉매의 활성을 극대화하기 위하여 담지된 페롭스카이트 촉매(XLaNi0.9Pt0.1O3/Al2O3: X=페롭스카이트 함량(wt%), 0, 10, 20, 30, 40, 50 및 100)를 적용하였다. XLaNi0.9Pt0.1O3/Al2O3 촉매의 활성은 페롭스카이트 함량에 따라 화산형(Volcano-shaped) 곡선을 나타내었으며, 이 때 20LaNi0.9Pt0.1O3/Al2O3 촉매가 180 ℃의 반응 온도에서 88.7%의 가장 높은 전환율을 보였다.

Various La-based perovskite catalysts were prepared by a Pechini method, and they were applied to the low-temperature oxidation of odor compounds exhausted from waste food treatment process for effective deodorization. Quantitative and qualitative analyses of exhausted gas were conducted to measure the amount of major odor compounds with respect to operation time. A standard odor sample composed of major odor compounds was then prepared for use_x000D_ as a feed for oxidation reaction system. Various transition metal(M)-substituted La-based perovskite catalysts (LaMO3:M=Cr, Mn, Fe, Co, and Ni) were prepared and applied to the oxidation of odor compounds in order to investigate the effect of transition metal M. Among the catalysts tested, LaNiO3 catalyst showed the best catalytic performance. Pt-substituted perovskite catalysts (LaNi1-xPtxO3: x=0, 0.03, 0.1, and 0.3) were then prepared for enhancing the catalytic performance. It was found that LaNi0.9Pt0.1O3 catalyst served as the most efficient catalyst. Supported perovskite catalysts (XLaNi0.9Pt0.1O3/Al2O3: X=perovskite content(wt%), 0, 10, 20, 30, 40, 50, and 100) were finally applied for the purpose of maximizing the catalytic performance of perovskite catalyst in the low-temperature oxidation reaction. Catalytic performance of XLaNi0.9Pt0.1O3/Al2O3 catalysts showed a volcano-shaped curve with respect to perovskite content. Among the catalysts tested, 20LaNi0.9Pt0.1O3/Al2O3 catalyst exhibited the highest conversion of odor compounds of 88.7% at 180 ℃.

Perovskite Low-temperature Oxidation Waste Food Treatment Process Odor Compounds Deodorization

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