Influence of Calcination Temperature of TiO₂ Support on CuO/TiO₂ Catalysts for NO + CO Reaction

Abstract:

A series of CuO/TiO₂ catalysts were prepared with sol-gel and impregnation method and characterized by TG-DSC、FTIR、XRD and H₂-TPR. The effect of calcination temperature of TiO₂ carrier on the performance of CuO/TiO₂ for the NO + CO reaction was investigated. The results showed that CuO/TiO₂ (500°C, 15%) catalyst had superior catalytic activity with NO conversion and N₂ selectivity of 99.5% and 82.3% at 350°C, respectively. The activities of the CuO/TiO₂ catalysts were in the sequence of CuO/TiO₂ (500) > CuO/TiO₂ (600) > CuO/TiO₂ (700) > CuO/TiO₂ (400). Combined with TG-DSC and XRD patterns, the anatase phase transform into rutial phase at 462.9°C to 800°C in the TG-DSC patterns, while only rutile phase was present at 700°C in the XRD patterns. It indicated that CuO had a positive effect on phase transformation of TiO₂ from anatase to rutial. The IR spectra demonstrated that there were some organic ingredients left in the surface of TiO2 gel before calcination. The results of H₂-TPR suggested that the highly dispersed CuO was present on the CuO/TiO₂ catalysts when the calcination temperature of TiO₂ gel was below 500°C. Mixed oxide of CuO and TiO₂ was formed when the calcination temperature of TiO2 gel was above 600°C.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 225-229
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.225
• Online since: July 2012
• Authors: Hao Jin Chen, Han Bo Zou, Zhen Peng Lu, Jian Ye Wu
• Keywords: CuO/TiO₂ Catalyst, NO+CO, Sol-Gel Method, TiO₂ Carrier

References

[1] S. J. Chung, K. C. Pillai and ll S: Moon. Sep. Pur. Tenchnol. Vol.65 (2009), P.156.

[2] S. Matsuda, A. Kato: Appl.Catal. Vol.8 (1983), P. 149

[3] A. Miyamoto, Y. Yamazaki and M. Inomata: J. Phys. Chem. Vol. 85 (1981), P. 2366

[4] D. J. Cole, C. F. Cullis and D. J. Hucknall:J. Chem. Soc. Faraday Trans.1. Vol. 72 (1976), P. 2185

[5] Y. J. Li, J. N. Armor: Appl. Catal. B Environ. Vol.4 (1994), P. L1.

[6] S. Bröer, T. Hammer: Appl. Catal. B Environ. Vol.28 (2000), P. 101

[7] B. M. Reddy, A. Khan: J. Phys. Chem. B. Vol. 107 (2003), P. 5162

[8] H. Yahiro, M Iwamoto: Appl. Catal. A. Vol. 222(2001), P. 163

[9] X.Y. Jiang, G.H. Ding and L.P. Lou: J. Mol. Catal. A:Chem. Vol. 218 (2004), P.187

[10] B.Y. Wang, X.Y. Guo and Z.J. Zhang: Funct. Mater. Vol.34 (2003), P 657 In Chinese

[11] T. Ohsaka, T. S. Yamaoka and O.Shimomura: Solid State Commun. Vol.30 (1979), P. 345

[12] H. P. Wang, Q.L. Zhang and H. Yang: Rare Metal Mater. Eng. Vol.33 (2004), P.133 In Chinese

[13] H.B. Zou, X.F. Dong and W.M. Lin: Appl. Surf. Sci. Vol.253 (2006), P.2893