MnMgLaAg/Al2O3 복합산화물 촉매에 의한 벤젠 연소반응

김덕중; 김영철; 박남국; Deok Jung Kim; Young Chul Kim; Nam Cook Park

Journal of the Korean Industrial and Engineering Chemistry, Vol.12, No.1, 39-44, February, 2001

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MnMgLaAg/Al2O3 복합산화물 촉매에 의한 벤젠 연소반응

Catalytic Combustion of Benzene on MnMgLaAg/Al2O3 Mixed Metal Oxide Catalysts

김덕중, 김영철 , 박남국 ^†

전남대학교 공과대학 화학공학부, 촉매연구소, 광주 500-757

Deok Jung Kim, Young Chul Kim , and Nam Cook Park^†

Department of Chemical Engineering and the Research Institute of Catalysis, Chonnam National University, Kwangju 500-757, Korea

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초록

대기오염 저감 기술 개발을 위해서 휘발성 유기 화합물(VOC) 중 벤젠의 촉매적 연소 반응을 연구하였다. 알루미나에 Ag, Mn, Mg 및 La을 담지한 MnMgLaAg/Al2O3 복합 산화물 촉매를 제조하여, TPD, XRD, EDX 및 SEM 등을 통하여 Ag, Mn 및 La의 담지효과와 각 금속의 역할을 규명하였다. MnMgLaAg/Al2O3 촉매의 활성점은 표면의 금속 Ag 결정상으로, Ag의 담지량이 많을수록 촉매의 활성은 증가하였고, 고온에서 소성한 촉매는 표면의 Ag와 Mn이 결합하여 Ag2MnO4의 결정상을 형성하여 활성을 저하시켰다. 또한 적당량의 La와 Mn의 담지에 의하여 산소의 흡착량 증가와 촉매의 내구성을 향상하여 벤젠 연소반응의 활성이 우수한 촉매를 제조할 수 있었다.

Catalytic combustion of benzene, a volatile organic compound (VOC), was studied for the purpose of air pollution reduction. MnMgLaAg/Al2O3 catalysts were prepared, and the effects of Ag, Mn, and La additives on the catalysts were investigated by TPD, XRD, EDX and SEM. Ag crystallite addition on the catalysts surface provided the greatest enhancement of the catalyst's activity. The activity increased with the increased loading of Ag in MnMgLaAg/Al2O3 catalysts. Ag2MnO4 sites, which were formed by calcination at greater than 400 ℃, were found to be detrimental to catalytic activity. Moreover, appropriate amounts of La and Mn addition seems to be necessary to increase adsorption of oxygen and durability of activity for the catalytic combustion of benzene.

Keywords:Benzene;Catalyst;Combustion;VOC;Ag

[References]

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[Related Articles]

[1] 유철진, 첨단 환경 기술, 1월, 78 (1998)

[2] Kennedy LA, Ruckenstein E, Catal. Rev.-Sci. Eng., 26, 1 (1984)

[3] Pfefferle LD, Pfefferle WC, Catal. Rev.-Sci. Eng., 29(2-3), 219 (1987)

[4] Noordally E, Richmond FR, Tahir SF, Catal. Today, 17, 359 (1993)

[5] Perego C, Villa P, Catal. Today, 34(3-4), 281 (1997)

[6] Spivey JJ, Ind. Eng. Chem. Res., 26, 2165 (1987)

[7] Bethke KA, Kung HH, J. Catal., 172(1), 93 (1997)

[8] Plummer HK, Watkins WLH, Gandhi HS, Appl. Catal., 29, 261 (1987)

[9] Li SY, Li SL, Li BL, React. Kinet. Catal. Lett., 62, 89 (1997)