Tungsten Oxide Modified V2O5-Sb2O3/TiO2 Monolithic Catalyst: NH3-SCR Activity and Sulfur Resistance

被引：5
作者：
Liu, Liping [1 ,2 ]
Wu, Xiaodong [2 ]
Ma, Yue [2 ]
Wang, Jinyi [1 ]
Ran, Rui [2 ]
Si, Zhichun [3 ]
Weng, Duan [2 ]
机构：
[1] Huaneng Clean Energy Res Inst, Beijing 102209, Peoples R China
[2] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
[3] Tsinghua Univ, Grad Sch Shenzhen, Shenzhen 518055, Peoples R China
来源：
PROCESSES | 2022年 / 10卷 / 07期
关键词：
NH3-SCR; vanadia species; tungsten oxide; low temperatures; sulfates; V2O5/TIO2; CATALYST; VANADIUM-TITANIUM; NO REDUCTION; TIO2; SUPPORT; SCR CATALYST; DECOMPOSITION; NH3; SO2; REACTIVITY; NH4HSO4;
D O I：
10.3390/pr10071333
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
In this study, a V2O5-Sb2O3/TiO2 monolithic catalyst was modified by introducing WO3. The WO3-modified catalyst exhibited enhanced catalytic activity in the measuring temperature range of 175-320 degrees C. The changes in dispersion of vanadia species were investigated by ultraviolet-visible (UV-Vis) spectroscopy and H-2 temperature-programmed reduction (H-2-TPR). A durability test was conducted in a wet SO2-containing atmosphere at 220 degrees C for 25 h. The sulfate deposition was estimated by temperature-programmed decomposition (TPDC) of sulfates, thermo-gravimetric (TG) analysis, and temperature-programmed desorption (TPD) of NH3. Isothermal SO2 oxidation and temperature-programmed surface reaction (TPSR) of NH4HSO4 with NO were performed. Based on these characterizations, effects of WO3 modification on the sulfate tolerance of the catalyst were explored.
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页数：13
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