Author(s)

Kai Zhang, Wei Zhao, Shengping Dou, Qian Wang

School of Energy and Power Engineering, Jiangsu University, Zhenjiang, China.

Ti³⁺ self-doping modified V₂O₅/TiO₂ catalyst was prepared by sol-gel and impregnation methods and used for selective catalytic reduction (SCR) of NO_x with NH₃. Results showed that Ti³⁺ self-doped V₂O₅/TiO₂ catalyst performed the better catalytic activity. And X-ray diffraction and scanning electron microscopy were used to evaluate the phase composition and morphology of the prepared catalyst. The effects of calcinations temperature of the support, oxygen concentration, [NH₃]/[NO] molar ratio and the GHSV on the denitration performance were investigated. It was found that more than 80% NO_x conversion was obtained at 210°C when the O₂ volume fraction was 5%, the NO concentration was 500 ppm, the [NH₃]/[NO] molar ratio = 1 and the GHSV was 23,885 h⁻¹. The results showed that the catalytic activity increased first with the increasing of O₂ concentration and [NH₃]/[NO] molar ratio, then remained stable. At the same time, the stability of the catalyst was also studied at the temperature of 210°C. The reaction continued for 750 minutes, and the catalytic activity remained above 80%, indicating that the catalyst has a good stability. Moreover, the Ti³⁺ self-doped V₂O₅/TiO₂ catalyst also showed good SO₂ and H₂O resistance. Therefore, these findings provide important information to better understand the application of the prepared catalyst.

Selective Catalytic Reduction, Denitrification, Operation Condition, Preparation Condition

Zhang, K. , Zhao, W. , Dou, S. and Wang, Q. (2020) Catalytic Performance of Ti³⁺ Self-Doped V₂O₅-TiO₂ Catalysts for Selective Catalytic Reduction with NH₃. Journal of Materials Science and Chemical Engineering, 8, 16-26. doi: 10.4236/msce.2020.82003.