Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Catalytic Combustion of Benzene over CuO-CeO2 Mixed Oxides Prepared by Co-precipitation Method

침전법으로 제조된 CuO-CeO2 혼합산화물에서 벤젠의 촉매연소반응

  • Hong, Seong Soo (Department of Chemical Engineering, Pukyong National University)
  • Received : 2014.04.01
  • Accepted : 2014.04.25
  • Published : 2014.06.10
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Abstract

Catalytic combustion of benzene over CuO-$CeO_2$ mixed oxides prepared by co-precipitation method were investigated. The CuO-$CeO_2$ mixed oxides were also prepared using different precipitant and CuO precursor. They were characterized by XRD, BET, XPS and $H_2-TPR$. In the CuO-$CeO_2$ catalysts, characteristic copper oxide peaks were shown at $2{\Theta}=35.5^{\circ}$ and $38.5^{\circ}$ regardless of the precipitant. The Cu0.35 catalyst prepared using $NH_4OH$ as a precipitant revealed the highest activity on the combustion of benzene. In addition, the pretreatment with hydrogen enhanced the catalytic activity and the catalyst reduced at $400^{\circ}C$ showed the highest activity on the combustion of benzene.

공침전법으로 제조된 CuO-$CeO_2$ 혼합산화물 촉매에서 벤젠의 촉매연소 반응에 대해 연구하였다. CuO-$CeO_2$ 혼합산화물 촉매들은 침전제 및 CuO 전구체를 달리하여 제조하였고, XRD, BET, XPS 및 $H_2-TPR$에 의해 특성분석을 하였다. 침전제의 종류에 상관없이 CuO 피크가 $2{\Theta}=35.5^{\circ}$와 $38.5^{\circ}$에서 뚜렷하게 나타났다. $NH_4OH$를 침전제로 사용하여 제조한 Cu/(Cu+Ce)의 몰비율이 0.35인 촉매가 가장 높은 활성을 보여주었다. 또한, 수소로 전처리하면 벤젠 연소반응의 활성이 증가하였고, $400^{\circ}C$에서 수소로 전처리한 촉매가 가장 높은 활성을 보여주었다.

Keywords

References

  1. J. J. Spivey, Complete Catalytic Oxidation of Volatile Organics, Ind. Eng. Chem. Res., 26, 2165-2180 (1987). https://doi.org/10.1021/ie00071a001
  2. J. B. Wang, D. H. Tsai, and T. J. Huang, Synergistic Catalysis of Carbon Monoxide Oxidation over Copper Oxide Supported on Samaria-Doped Ceria, J. Catal., 208, 370-380 (2002). https://doi.org/10.1006/jcat.2002.3580
  3. W. Liu and M. Flytzani-Stephanopoulos, Total Oxidation of Carbon Monoxide and Methane over Transition Metal Fluorite Oxide Composite Catalysts : I. Catalyst Composition and Activity, J. Catal., 153, 304-316 (1995). https://doi.org/10.1006/jcat.1995.1132
  4. P. Knauth, G. Schwitzgebek, A. Schope, and S. Villain, Emf Measurements on Nanocrystalline Copper-Doped Ceria, J. Solid State Chem., 140, 295-299 (1998). https://doi.org/10.1006/jssc.1998.7890
  5. M. Kang, M. W. Song, and C. H. Lee, Catalytic Carbon Monoxide Oxidation over CoOx/$CeO_2$ Composite Catalysts, Appl. Catal. A. : Gen., 251, 143-156 (2003). https://doi.org/10.1016/S0926-860X(03)00324-7
  6. G. A. Martin and J. A. Dalmon, Benzene Hydrogenation over Nickel Catalysts at Low and High Temperatures : Structuresensitivity and Copper Alloying Effects, J. Catal., 75, 233-242 (1982). https://doi.org/10.1016/0021-9517(82)90205-6
  7. J. S. Yang, W. Y. Jung, G. D. Lee, S. S. Park, E. D. Jeong, H. G. Kim, and S. S. Hong, Catalytic Combustion of Benzene over Metal Oxides Supported on SBA-15, J. Ind. & Eng. Chem., 14, 779-784 (2008). https://doi.org/10.1016/j.jiec.2008.05.008
  8. W. Y. Jung, Y. I. Song, and S. S. Hong, Complete Combustion of Benzene over CuO/$CeO_2$ Catalysts Prepared by Various Methods, Kor. Soc. Clen. Tech., 19, 128-133 (2013). https://doi.org/10.7464/ksct.2013.19.2.128
  9. A. Gervasini and S. Bennici, Dispersion and Surface States of Copper Catalysts by Temperature-programmed-reduction of Oxidized Surfaces (s-TPR), Appl. Catal. A., 281, 199-205 (2005). https://doi.org/10.1016/j.apcata.2004.11.030
  10. B. D. Cullity, Elements of X-Ray Diffraction, Adison-Wesley, Reading, MA (1978).
  11. J. S. Yang, W. Y. Jung, G. D. Lee, S. S. Park, and S. S. Hong, Effect of Pretreatment Conditions on the Catalytic Activity of Benzene Combustion over SBA-15-Supported Copper Oxides, Topics in Catal., 53, 543-549 (2010). https://doi.org/10.1007/s11244-010-9484-x
  12. N. A. Merino, B. P. Barbero, P. Eloy, and L. E. Cadus, $La_1-_xCa_xCoO_3$ Perovskite-type Oxides: Identification of the Surface Oxygen Species by XPS, Appl. Surf. Sci., 253, 1489-1493 (2006). https://doi.org/10.1016/j.apsusc.2006.02.035
  13. G. H. Lee, M. S. Lee, G. D. Lee, Y. H. Kim, and S. S. Hong, Catalytic Combustion of Benzene over Copper Oxide Supported on $TiO_2$ Prepared by Sol-Gel Method, J. Ind. Eng. Chem., 8, 572-577 (2002).
  14. J. M. Gallardo-Amores, T. Armaroli, R. Ramis, E. Finocchio, and G. Busca, A Study of Anatase-supported Mn Oxide as Catalysts for 2-Propanol Oxidation, Appl. Catal. B., 22, 249-259 (1999). https://doi.org/10.1016/S0926-3373(99)00055-7