VOX supported on TiO2-Ce0.9Zr0.1O2 core-shell structure catalyst for NH3-SCR of NO

被引：19
作者：
Sun, Lvesheng [1 ]
Cao, Shunxin [1 ]
Huang, Yun [1 ]
Zhang, Yiming [1 ]
Xiao, Youhong [2 ]
Dong, GuoJun [1 ]
Su, Yu [3 ]
机构：
[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Educ Minist, Harbin 150001, Heilongjiang, Peoples R China
[2] Harbin Engn Univ, Coll Power & Energy Engn, Harbin 150001, Heilongjiang, Peoples R China
[3] Heilongjiang Univ, Sch Chem Chem Engn & Mat, Harbin 150080, Heilongjiang, Peoples R China
来源：
RSC ADVANCES | 2019年 / 9卷 / 52期
关键词：
LOW-TEMPERATURE NH3-SCR; PHOTOCATALYTIC ACTIVITY; V2O5-WO3/TIO2; CATALYST; ELEMENTAL MERCURY; OXIDATION-STATES; ACTIVE-SITES; REDUCTION; PERFORMANCE; NH3; SCR;
D O I：
10.1039/c9ra05024h
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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, H-2-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 Ce(3+)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 N-2 selectivity (>97.5%) at 40 000 h(-1) GHSV and 250-400 degrees C.
引用
收藏
页码：30340 / 30349
页数：10
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