Oxidation of toluene by Pt/Co3O4-CeO2 catalyst prepared from pulverized cerium oxide
- Kenichiro Inoue, Tokyo Metropolitan Industrial Technology Research Institute, Aomi, Koto-ku, Tokyo, Japan, Corresponding Author; E-mail: firstname.lastname@example.org
- Shoichi Somekawa, Tokyo Metropolitan Industrial Technology Research Institute, Aomi, Koto-ku, Tokyo, Japan
We prepared Pt/Co3O4-CeO2 catalyst from pulverized cerium oxide, and evaluated the catalytic oxidation activity for toluene. Pulverization in a ball mill reduced the median diameter of the cerium oxide particles from 23.3 μm to 0.415 μm. Although the oxidation temperature of toluene hardly changed, even with pulverization of the cerium oxide, the deposition of carbon on the catalyst surface was reduced. The dispersibility of platinum on the surface after pulverization did not differ significantly from the case without pulverization. However, the pulverization increased the total external surface area of the cerium oxide particles from 0.66 m2 g–1 to 16.7 m2 g–1, and increased the contact area between the coke deposited on the surface and the cerium oxide, which influences soot combustion. Consequently, it is thought that the coke, which is unburned carbon like soot, became more oxidizable on the pulverized cerium oxide.
Diehl, F., Barbier, J. Jr., Duprez, D., Guibard, I., & Mabilon, G. (2010). Catalytic oxidation of heavy hydrocarbons over Pt/Al2O3. Influence of the structure of the molecule on its reactivity. Applied Catalysis B: Environmental, 95, 217-227.
Inoue, J., Somekawa, S., Mizukoshi, A., Hagiwara, T., Shinoda, T., Fujiwara, H., . . . Nagatomi, T. (2013). Development of ball-type Co3O4-CeO2 catalysts. Bulletin of Tokyo Metropolitan Industrial Technology Research Institute, 8, 124-125 (In Japanese).
Inoue, K., Somekawa, S., Shinoda, T., Fujiwara, H., & Kawami, Y. (2018). Regeneration of Co3O4-CeO2 catalyst used for odor elimination in an offset printing factory. Journal of Current Science and Technology, 8(1), 51-55.
Inoue, K., & Somekawa, S. (2019). Treatment of volatile organic compounds with a Pt/Co3O4-CeO2 catalyst. Chemical Engineering & Technology, 42, 257-260. DOI: 10.1002/ceat.201800245
Ivanova, T. V., Toivonen, J., Maydannik, P. S., Kaeaeriaeinen, T., Sillanpaeae, M., Homola, T., & Cameron, D. C. (2016). Atomic layer deposition of cerium oxide for potential use in diesel soot combustion. Journal of Vacuum Science & Technology. A. Vacuum, Surfaces and Films, 34, 031506-031506-10. DOI: 10.1116/1.4944589
Kawami, Y. (2016). Co･Ce sankabutsukei VOC bunkai shokubai no gijutsu to tokucho. JETI (Japan Energy & Technology Intelligence), 64, 56-58 (In Japanese).
Khan, F. I., & Kr. Ghoshal, A. (2000). Removal of volatile organic compounds from polluted air. Journal of Loss Prevention in the Process Industries, 13, 527-545. DOI: 10.1016/S0950-4230(00)00007-3
Liotta, L. F., Ousmane, M., Di Carlo, G., Pantaleo, G., Deganello, G., Boreave, A., & Giroir-Fendler, A. (2009). Catalytic removal of toluene over Co3O4-CeO2 mixed oxide catalysts: comparison with Pt/Al2O3. Catalysis Letters, 127(4), 270-276. DOI: 10.1007/s10562-008-9640-0
Ministry of the Environment, Government of Japan. (2018). Report on volatile organic compound (VOC) emission inventory compiled (In Japanese).
Muroyama, H., Asajima, H., Hano, S., Matsui, T., & Eguchi, K. (2015). Effect of an additive in a CeO2-based oxide on catalytic soot combustion. Applied Catalysis. A: General, 489, 235-240. DOI: 10.1016/j.apcata.2014.10.039
Nakamura, K., Hattori, M., Yokota, K., & Ozawa, M. (2018). Preparation of CeO2-based nanoparticles and their catalytic properties for soot combustion. Journal of the Japan Society of Powder and Powder Metallurgy Index, 65(4), 183-186. DOI: 10.2497/jjspm.65.183
Papaefthimiou, P., Ioannides, T., & Verykios, X. E. (1998). Performance of doped Pt/TiO2 (W6+) catalysts for combustion of volatile organic compounds (VOCs). Applied Catalysis B: Environmental, 15(1-2), 75-92. DOI: 10.1016/S0926-3373(97)00038-6
Sawyer, J. E., & Abraham, M. A. (1994). Reaction pathways during the oxidation of ethyl acetate on a platinum/alumina catalyst. Industrial & Engineering Chemistry Research, 33(9), 2084-2089. DOI: 10.1021/ie00033a009
Soler, L., Casanovas, A., Escudero, C., Perez-Dieste, V., Aneggi, E., Trovarelli, A., & Llorca, J. (2016). Ambient pressure photoemission spectroscopy reveals the mechanism of carbon soot oxidation in ceria-based catalysts. Chemcatchem, 8, 2748-2751. DOI: 10.1002/cctc.201600615
Wang, H., Liu, S., Zhao, Z., Zou, X., Liu, M., Liu, W., . . . Weng, D. (2017). Activation and deactivation of Ag/CeO2 during soot oxidation: influences of interfacial ceria reduction. Catalysis Science & Technology, 7, 2129-2139. DOI: 10.1039/C7CY00450H