DOI QR코드

DOI QR Code

Catalytic Combustion of Carbon Particulate over LaMnO3 Perovskite-Type Oxides

LaMnO3형 페롭스카이트 산화물에서 입자상물질의 촉매연소반응

  • 이용화 (부경대학교 응용화학공학부) ;
  • 이근대 (부경대학교 응용화학공학부) ;
  • 박성수 (부경대학교 응용화학공학부) ;
  • 홍성수 (부경대학교 응용화학공학부)
  • Published : 2004.07.01

Abstract

We have studied the catalytic combustion of soot particulates over perovskite-type oxides prepared by malic acid method, The catalysts were modified to enhance the activity by substitution of metal into A or B site of perovskite oxide. In addition, the reaction conditions such as temperature and $O_2$ concentration were investigated. The partial substitution of alkali metals into A site in the $LaMnO_3$ catalyst, enhanced the catalytic activity in the combustion of carbon particulate and the activity was shown in the order: Cs > K > Na. For the $La_{1-x}Cs_{x}MnO_{3}$ catalysts, the catalytic activity showed the maximum value with x=0.3 but no more increase on the catalytic activity was shown with x > 0.3. For the $La_{0.8}Cs_{0.2}MnO_{3}$ catalyst, the substitution of Fe or Ni increased the ignition temperature. The ignition temperature decreased with an increase of $O_2$ concentration, however, no more increase in the catalytic activity was shown with $O_2$ concentration > 0.2. The introduction of NO into reactants showed no effect on the catalytic activity.

Keywords

Combustion;Carbon particulate;Perovskite oxide;$LaMnO_3$;NO;Diesel engine exhaust gas

References

  1. Searles, R. A., 1988, Car exhaust pollution control, Platinum Metals Rev., 32, 123-130.
  2. Lee, S. D., 1980, Nitrogen Oxides and their effect on Health, Ann Arbor Publishers, Michigan, 382pp.
  3. Heck, R. M. and R. J. Farrauto, 1993, Catalytic Air Pollution Controll, VNR press, 293pp.
  4. Bickel, K. and W. A. Majewski, 1993, Evaluation of a catalyzed ceramic diesel particulate filter and catalytic converter on an underground mine vehicle, SAE 922330, 1-7.
  5. Anderson, D. J. and F. R. Sale, 1979, Production of conducting oxide powders by amorphous citrate peocesses, Powder Metall., 2L, 14-19.
  6. Hong, S. S., G. D. Lee, J. W. Park, D. W. Park, K. J. Oh and K. M. Cho, 1997, Catalytic Reduction of NO over Perovskite-type Catalysts. KJChE, 14(6), 491-497.
  7. Teraoka, Y., K. Nakano, S. Kagawa and W. F. Shangguan, 1995, Simultaneous catalytic removal of nitrogen oxides and diesel soot particulate over perovskite-type oxides, Appl. Catal. B, 5, L181-L185. https://doi.org/10.1016/0926-3373(94)00059-X
  8. Voorhoeve, R. J. H., 1977, Advaned material in catalysis, Academic press, 129pp.
  9. Yamazoe, N. and Y. Teraoka, 1990, Oxidation catalysis of perovskites relation to the bulk structure and composition, Catal. Today, 8, 175-199. https://doi.org/10.1016/0920-5861(90)87017-W
  10. Ahlstrom, A. F. and C. U. I. Odenbrand, 1990, Combustion of soot deposits from diesel engines on mixed oxides of vanadium pentoxide and cupric oxide, Appl. Catal., 60, 157-172. https://doi.org/10.1016/S0166-9834(00)82179-X
  11. Yang, J. S., S. S. Hong, D. Y. Jung, K. W. Oh, K. M. Cho, B. K. Ryu and D. W. Park, 1998, Catalytic combustion of soot particulate over perovskite-type oxides, Journal of Industrial and Engineering Chemistry, 9(6), 803-810.
  12. Teraoka, Y., K. Nakano, W. F. Shangguan and S. Kagawa, 1996, Simultaneous catalytic removal of nitrogen oxides and diesel soot particulate over perovskite-related oxides, Catal. Today, 27, 107-113. https://doi.org/10.1016/0920-5861(95)00177-8
  13. Yamashita, H., H. Yamada, A. Tomita, A. Kyotani and R. Helferich, 1993, Influenece of char surface chemistry on the reduction of nitric oxide with chars, Energy & Fuels, 7, 85-89. https://doi.org/10.1021/ef00037a014