Catalytic oxidation and adsorption of Hg0 over low-temperature NH3-SCR LaMnO3 perovskite oxide from flue gas

2016 ◽  
Vol 186 ◽  
pp. 30-40 ◽  
Author(s):  
Haomiao Xu ◽  
Zan Qu ◽  
Chenxi Zong ◽  
Fuquan Quan ◽  
Jian Mei ◽  
...  
RSC Advances ◽  
2016 ◽  
Vol 6 (68) ◽  
pp. 63559-63567 ◽  
Author(s):  
Haomiao Xu ◽  
Yongpeng Ma ◽  
Songjian Zhao ◽  
Wenjun Huang ◽  
Zan Qu ◽  
...  

Mn-based perovskite oxide was used as the active site for elemental mercury (Hg0) removal from coal-fired flue gas.


2019 ◽  
Vol 378 ◽  
pp. 122100 ◽  
Author(s):  
Peipei Zhao ◽  
Mingyu Guo ◽  
Qingling Liu ◽  
Lijun Fan ◽  
Jinfeng Han ◽  
...  

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 618
Author(s):  
Huan Du ◽  
Zhitao Han ◽  
Xitian Wu ◽  
Chenglong Li ◽  
Yu Gao ◽  
...  

Er-modified FeMn/TiO2 catalysts were prepared through the wet impregnation method, and their NH3-SCR activities were tested. The results showed that Er modification could obviously promote SO2 resistance of FeMn/TiO2 catalysts at a low temperature. The promoting effect and mechanism were explored in detail using various techniques, such as BET, XRD, H2-TPR, XPS, TG, and in-situ DRIFTS. The characterization results indicated that Er modification on FeMn/TiO2 catalysts could increase the Mn4+ concentration and surface chemisorbed labile oxygen ratio, which was favorable for NO oxidation to NO2, further accelerating low-temperature SCR activity through the “fast SCR” reaction. As fast SCR reaction could accelerate the consumption of adsorbed NH3 species, it would benefit to restrain the competitive adsorption of SO2 and limit the reaction between adsorbed SO2 and NH3 species. XPS results indicated that ammonium sulfates and Mn sulfates formed were found on Er-modified FeMn/TiO2 catalyst surface seemed much less than those on FeMn/TiO2 catalyst surface, suggested that Er modification was helpful for reducing the generation or deposition of sulfate salts on the catalyst surface. According to in-situ DRIFTS the results of, the presence of SO2 in feeding gas imposed a stronger impact on the NO adsorption than NH3 adsorption on Lewis acid sites of Er-modified FeMn/TiO2 catalysts, gradually making NH3-SCR reaction to proceed in E–R mechanism rather than L–H mechanism. DRIFTS.


2021 ◽  
Vol 49 (1) ◽  
pp. 113-120
Author(s):  
Dong-jie YAN ◽  
Tong GUO ◽  
Ya YU ◽  
Zhao-hui CHEN

Fuel ◽  
2021 ◽  
Vol 303 ◽  
pp. 121239
Author(s):  
Zhiping Zhang ◽  
Yingying Li ◽  
Piaoping Yang ◽  
Yushi Li ◽  
Chen Zhao ◽  
...  

2021 ◽  
Vol 9 (5) ◽  
pp. 106323
Author(s):  
Yuhan Zhou ◽  
Buxin Su ◽  
Shan Ren ◽  
Zhichao Chen ◽  
Zenghui Su ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document