CH<SUB>4</SUB>, CO 및 HCHO 산화반응에 대한 알루미나 담지 백금 촉매에서의 세륨 첨가효과

박남국; 김영철; 김덕중

HWAHAK KONGHAK, Vol.36, No.2, 139-143, April, 1998

Export Citation

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

박남국, 김영철, 김덕중

초록

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%.

Keywords:Platinum Catalyst;Ceria;Methane;Carbon Monoxide;Formaldehyde

[References]

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[1] White JJ, Carroll JN, Liss WE, Brady MJ, Burkmyre WM, Church M, SAE Paper No. 930222

[2] Subramanian S, Kudla RJ, Chattha MS, SAE Paper No. 930223

[3] Sakai T, Choi BC, Osuga R, Ko Y, Kim E, SAE Paper No. 920596

[4] Choi BC, Sakai T, SAE Paper No. 942008

[5] Cullils CF, Willant BM, J. Catal., 83, 267 (1983)

[6] Farranto RJ, Hobson MC, Kennelly TK, Waterman EM, Appl. Catal. A: Gen., 81, 227 (1992)

[7] Bettman M, Chase BE, Otto K, Weber WH, J. Catal., 117, 447 (1989)

[8] Burch R, Loader PK, Appl. Catal. B: Environ., 5(1-2), 149 (1994)

[9] Hardacre C, Rayment T, Lambert RM, J. Catal., 158(1), 102 (1996)

[10] Foster JJ, Masel RI, Ind. Eng. Chem. Prod. Res. Dev., 25, 563 (1986)

[11] Ozkan US, Kueller RF, Moctezuma E, Ind. Eng. Chem. Prod. Res. Dev., 29, 1136 (1990)

[12] McCabe RW, Mitchell PJ, Appl. Catal., 27, 83 (1986)

[13] Yao HC, Yu Yao YF, J. Catal., 86, 254 (1984)

[14] Yu Yao YF, J. Catal., 87, 152 (1984)

[15] McCabe RW, Wong C, Woo HS, J. Catal., 114, 354 (1988)