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CH4, CO 및 HCHO 산화반응에 대한 알루미나 담지 백금 촉매에서의 세륨 첨가효과
Effect of Cerium Addition to Alumina-Supported Platinum Catalysts for CH4, CO and HCHO Oxidation
HWAHAK KONGHAK, April 1998, 36(2), 139-143(5), NONE
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Abstract
백금 및 세리아의 담지량이 각각 0.02-0.04 및 0.3-7.6wt%인 알루미나 담지 백금 및 백금-세리아 촉매를 공침법으로 제조한 촉매를 사용하여 메탄, 일산화탄소 및 포름알데히드의 산화반응에 대하여 연구하였다. 반응활성 테스트와 O2-TPD 및 H2-TPR 실험을 통하여 촉매의 특성을 조사했는데, 적절한 양(0.3-0.8wt%)의 세리아가 첨가되면 촉매의 활성이 증가하였지만, 세리아의 함량이 많아도 촉매의 활성은 떨어졌다.
Complete oxidations of methane, carbon monoxide and formaldehyde were studied using platinum and platinum-ceria catalysts supported on Υ-alumina. Catalysts were prepared by coimpregnation method. Platinum and ceria loading were controlled at 0.02-0.04 wt% and 0.3-7.6 wt%, respectively. The characterization of the catalysts carried out by means of catalytic activity measurement, O2-TPD and H2-TPR. A small amount of added ceria enhanced the catalytic activity. However, as the amount of ceria increased the activity was decreased. Optimum loading of ceria were found 0.3-0.8 wt%.
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