VOX supported on TiO2–Ce0.9Zr0.1O2 core–shell structure catalyst for NH3-SCR of NO |
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| Authors: | Lvesheng Sun Shunxin Cao Yun Huang Yiming Zhang Youhong Xiao Guojun Dong Yu Su |
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| Affiliation: | College of Materials Science and Chemical Engineering, Key Laboratory of Superlight Materials and Surface Technology of Education Ministry, Harbin Engineering University, 150001 Harbin Heilongjiang P. R. China.; College of Power and Energy Engineering of Harbin Engineering University, 150001 Harbin Heilongjiang P. R. China ; School of Chemistry, Chemical Engineering and Materials of Heilongjiang University, 150080 Harbin Heilongjiang P. R. China, |
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| Abstract: | In this experiment, a TiO2–Ce0.9Zr0.1O2 support with core–shell structure was successfully prepared by a precipitation method and VOX/TiO2–Ce0.9Zr0.1O2 catalyst was prepared by an impregnation method, and the catalyst was used to catalyze the NH3-SCR of NO. Based on the results of HRTEM, XRD, BET, H2-TPR, NH3-TPD, XPS, Py-IR, it was speculated that due to the interaction between TiO2 and Ce0.9Zr0.1O2, more oxygen vacancies and Ce3+ are generated, which are beneficial to the existence of low-valence V by electron transfer between high valence state V and Ce3+and increase the acidic sites on the catalyst surface. The catalytic activity (>97%) of the VOX/TiO2–Ce0.9Zr0.1O2 catalyst is superior to the current commercial catalyst (V2O5–WO3/TiO2) and has a higher N2 selectivity (>97.5%) at 40 000 h−1 GHSV and 250–400 °C.VOX/TiO2–Ce0.9Zr0.1O2 catalyst exhibits high activity and selectivity in a wide temperature window. |
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