Significantly enhanced Pb resistance of a Co-modified Mn–Ce–Ox/TiO2 catalyst for low-temperature NH3-SCR of NOx

2020 ◽  
Vol 10 (18) ◽  
pp. 6368-6377
Author(s):  
Gehua Li ◽  
Dongsen Mao ◽  
Mengxi Chao ◽  
Gang Li ◽  
Jun Yu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Tio2 Catalyst ◽  
Nh3 Scr ◽  
Scr Of No ◽  
Scr Of Nox

Co modification can significantly improve the performance for low-temperature NH3-SCR of NOx and the Pb resistance of the Mn–Ce–Ox/TiO2 catalyst.

The promotional role of Nd on Mn/TiO2 catalyst for the low-temperature NH3‑SCR of NOx

2019 ◽  
Vol 332 ◽  
pp. 49-58 ◽  
Author(s):  
Jun Huang ◽  
He Huang ◽  
Hongtao Jiang ◽  
Licheng Liu
Keyword(s):  
Low Temperature ◽  
Tio2 Catalyst ◽  
Nh3 Scr ◽  
Scr Of Nox

scholarly journals The influence of CNTs addition on Mn-Ce/TiO2 catalyst for low-temperature NH3-SCR of NO

2021 ◽  
Vol 152 ◽  
pp. 106282
Author(s):  
Jae-Rang Youn ◽  
Min-Jae Kim ◽  
Seung-Jae Lee ◽  
In-Soo Ryu ◽  
Hyung Chul Yoon ◽  
...  
Keyword(s):  
Low Temperature ◽  
Tio2 Catalyst ◽  
Nh3 Scr ◽  
Scr Of No

scholarly journals Insight into the Promoting Role of Er Modification on SO2 Resistance for NH3-SCR at Low Temperature over FeMn/TiO2 Catalysts

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 618
Author(s):  
Huan Du ◽  
Zhitao Han ◽  
Xitian Wu ◽  
Chenglong Li ◽  
Yu Gao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Catalyst Surface ◽  
Impregnation Method ◽  
In Situ Drifts ◽  
Tio2 Catalyst ◽  
Nh3 Scr ◽  
Nh3 Adsorption ◽  
So2 Resistance ◽  
Fast Scr

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.

Lead poisoning and regeneration of Mn-Ce/TiO2 catalysts for NH3-SCR of NO at low temperature

2021 ◽  
Vol 49 (1) ◽  
pp. 113-120
Author(s):  
Dong-jie YAN ◽  
Tong GUO ◽  
Ya YU ◽  
Zhao-hui CHEN
Keyword(s):  
Low Temperature ◽  
Lead Poisoning ◽  
Nh3 Scr ◽  
Scr Of No

Nb2O5-modified Mn-Ce/AC catalyst with high ZnCl2 and SO2 tolerance for low-temperature NH3-SCR of NO

2021 ◽  
Vol 9 (5) ◽  
pp. 106323
Author(s):  
Yuhan Zhou ◽  
Buxin Su ◽  
Shan Ren ◽  
Zhichao Chen ◽  
Zenghui Su ◽  
...  
Keyword(s):  
Low Temperature ◽  
Nh3 Scr ◽  
Scr Of No ◽  
So2 Tolerance
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