N2O Decomposition Characteristics and Efficiency Enhancement of Rh/CeO2 Catalyst

Rh/CeO2 촉매의 N2O 분해반응 특성 및 효율증진 연구

  • Received : 2018.04.09
  • Accepted : 2018.06.08
  • Published : 2018.10.10


In this work, the $N_2O$ decomposition catalyst and reaction characteristics to control the $N_2O$ removal were described. Experiments were carried out by using Rh as an active metal catalyst on various supports and the $Rh/CeO_2$ catalyst with $CeO_2$ support showed the best activity for the $N_2O$ decomposition when it was prepared under the constant heat treatment condition ($500^{\circ}C$-4 hr). $H_2-TPR$ and XPS analyzes were performed to confirm the effect of the physical and chemical properties of the catalyst on $N_2O$ decomposition. As a result, it was found that the increase of the oxygen transfer capacity of the catalyst due to the increase of both the redox property and $Ce^{3+}$ amount affected the decomposition reaction of $N_2O$. In addition, the future work will include a treatment process capable of decomposition $N_2O$ and NO under the condition that $N_2O$ and NO are simultaneously generated and its characteristics of $N_2O$ decomposition reaction.


NO;$N_2O$;decomposition catalyst;$Rh/CeO_2$;XPS


  1. S. Parres-Esclapez, M. J. Illan-Gomez, C. Salinas-Martinez de Lecea, and A. Bueno-Lopez, Preparation and characterisation of $\gamma$-$Al_2O_3$ particles-supported Rh/$Ce_{0.9}Pr_{0.1}O_2$ catalyst for $N_2O$ decompostion in the presence of $O_2$, $H_2O$ and NOx, Int. J. Greenhouse Gas Control, 11, 251-261 (2012).
  2. A. Trovarelli, Catalysis by Ceria and Related Materials, Imperial College Press, UK (2001).
  3. P. Burroughs, A. Hamnett, A. F. Orchard, and G. Thornton, Satellite structure in the X-ray photoelectron spectra of some binary and mixed oxides of lanthanum and cerium, J. Chem. Soc. Dalton Trans., 0, 1686-1698 (1976).
  4. A. E. Nelson and K. H. Schulz, Surface chemistry and microstructural analysis of $Ce_xZr_{1-x}O_{2-y}$ model catalyst surfaces, Appl. Surf. Sci., 210, 206-221 (2003).
  5. L. Chen, J. Li, M. Ge, and R. Zhu, Enhanced activity of tungsten modified $CeO_2$/$TiO_2$ for selective catalytic reductioin of NOx with ammonia, Catal. Today, 153, 77-83 (2010).
  6. D. I. Kondarides and X. E. Verykios, Effect of chlorine on the chemisorptive properties of Rh/$CeO_2$ catalysts studied by XPS and temperature programmed desorption techniques, J. Catal., 174, 52-64 (1998).
  7. S. C. Christoforou, E. A. Efthimiadis, and I. A. Vasalos, Catalytic conversion of $N_2O$ to $N_2$ over metal-based catalysts in the presence of hydrocarbons and oxygen, Catal. Lett., 79, 137-147 (2002).
  8. P. Francesco, S. Martina, S. Giorgio, G. Eugenio, B. Flora, and M. Maela, Ru/$ZrO_2$ catalysts: II. $N_2O$ adsorption and decomposition, J. Catal., 192, 158-162 (2000).
  9. X. Zhang, Q. Shen, C. He, C. Ma, J. Cheng, Z. Liu, and Z. Hao, Decomposition of nitrous oxide over Co-zeolite catalysts: role of zeolite structure and active site, Catal. Sci. Technol., 2, 1249-1258 (2012).
  10. M. Hussain, D. Fino, and N. Russo, $N_2O$ decompostion by mesoporous silica supported Rh catalysts, J. Hazard. Mater., 211-212, 255-265 (2012).
  11. K. Doi, Y. Y. Wu, R. Takeda, A. Matsunami, N. Arai, T. Tagawa, and S. Goto, Catalytic decompostion of $N_2O$ in medical operating rooms over Rh/$Al_2O_3$, Pd/$Al_2O_3$, and Pt/$Al_2O_3$, Appl. Catal. B, 35, 43-51 (2001).
  12. H. Song, Synthesis and Reaction Characteristics of $N_2O$ Decomposition Catalysts Derived from Hydrotalcite-type Precursors, MS. Thesis, Sangmyung Univ., Korea (2004).
  13. S. S. Kim, S. J. Lee, and S. C. Hong, Effect of $CeO_2$ addition to Rh/$Al_2O_3$ catalyst on $N_2O$ decomposition, Chem. Eng. J., 169, 173-179 (2011).
  14. L. Chen, H. Y. Chen, J. Lin, and K. L. Tan, FT-IR, XPS and TPR studies of $N_2O$ decomposition over Cu-ZSM-5, Surf. Interface Anal., 28, 115-118 (1999).
  15. X. Li, Z. Changbin. H. Hong, and T. Yasutake, Catalytic decomposition of $N_2O$ over $CeO_2$ promoted $Co_3O_4$ spinel catalyst, Appl. Catal. B, 75, 167-174 (2007).
  16. W. H. Yang and M. H. Kim, Catalytic reduction of $N_2O$ by $H_2$ over well-characterized Pt surfaces, Korean J. Chem. Eng., 23, 908-918 (2006).
  17. J. Perez-Ramirez, F. Kapteijn, K. Schoffel, and J. A. Moulijn, Fomation and control of $N_2O$ in nitric acid production: Where do we stand today?, Appl. Catal. B, 44, 11-141 (2003).
  18. Greenhouse Gas Inventory & Research Center of Korea, Nantional Greenhouse Gas Inventory Report of Korea, Ministry of Environment, Korea (2016).
  19. H. K. Moon, Foramtion of $N_2O$ in $NH_3O$-SCR deNOx ing reaction with $V_2O_5/TiO_2$-based catalysts for fossil fuels-fired power stations, Korean Chem. Eng. Res., 51(2), 163-170 (2013).


Supported by : 경기대학교