Improved Activity and SO2 Resistance by Sm-Modulated Redox of MnCeSmTiOx Mesoporous Amorphous Oxides for Low-Temperature NH3-SCR of NO

ACS Catalysis ◽  
2020 ◽  
Vol 10 (16) ◽  
pp. 9034-9045
Author(s):  
Bing Wang ◽  
Meixin Wang ◽  
Lina Han ◽  
Yaqin Hou ◽  
Weiren Bao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Amorphous Oxides ◽  
Nh3 Scr ◽  
Scr Of No ◽  
So2 Resistance

MnO2–Graphene-oxide-scroll–TiO2 composite catalyst for low-temperature NH3-SCR of NO with good steam and SO2 resistance obtained by low-temperature carbon-coating and selective atomic layer deposition

2019 ◽  
Vol 9 (7) ◽  
pp. 1602-1608 ◽  
Author(s):  
Liwei Sun ◽  
Kai Li ◽  
Zeshu Zhang ◽  
Xuefeng Hu ◽  
Heyuan Tian ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Low Temperature ◽  
Atomic Layer Deposition ◽  
Carbon Coating ◽  
Atomic Layer ◽  
Composite Catalyst ◽  
Nh3 Scr ◽  
Layer Deposition ◽  
Scr Of No ◽  
So2 Resistance

Coating GO at low temperature and selectively depositing TiO2 on oxygen-containing functional groups on GO.

Spinel-structured Mn–Ni nanosheets for NH3-SCR of NO with good H2O and SO2 resistance at low temperature

2020 ◽  
Vol 10 (22) ◽  
pp. 7486-7501
Author(s):  
Fengyu Gao ◽  
Xiaolong Tang ◽  
Zaharaddeen Sani ◽  
Honghong Yi ◽  
Shunzheng Zhao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Specific Surface Area ◽  
Electronic Interaction ◽  
Adsorption Ability ◽  
Nh3 Scr ◽  
Scr Of No ◽  
So2 Resistance

High specific surface area, more NH3 adsorption ability and efficient electronic interaction over Mn–Ni spinel nanosheet leaded to good SCR activity, and Ni-outside with active Mn-inner spinel configuration and nanosheet morphology relieved SO2-poisoning.

Influence of Sm on the low temperature NH3-SCR of NO activity and H2O/SO2 resistance over the SmaMnNi2Ti7Ox (a = 0.1, 0.2, 0.3, 0.4) catalysts

2020 ◽  
Vol 590 ◽  
pp. 117333 ◽  
Author(s):  
Yongming Tong ◽  
Yushi Li ◽  
Zhibin Li ◽  
PeiQiang Wang ◽  
ZhiPing Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Nh3 Scr ◽  
Scr Of No ◽  
So2 Resistance

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

Significantly enhanced activity and SO2 resistance of Zr-modified CeTiOx catalyst for low-temperature NH3-SCR by H2 reduction treatment

2022 ◽  
Vol 518 ◽  
pp. 112069
Author(s):  
Xiaoling Wei ◽  
Runqi Zhao ◽  
Bingxian Chu ◽  
Shangzhi Xie ◽  
Qiuju qin ◽  
...  
Keyword(s):  
Low Temperature ◽  
Reduction Treatment ◽  
Nh3 Scr ◽  
Enhanced Activity ◽  
So2 Resistance

Synergistic effect of VOx and MnOx surface species for improved performance of V2O5/Ce0.5Ti0.5−xMnxO2−δ catalysts in low-temperature NH3-SCR of NO

2018 ◽  
Vol 8 (24) ◽  
pp. 6360-6374 ◽  
Author(s):  
Thanh Huyen Vuong ◽  
Stephan Bartling ◽  
Ursula Bentrup ◽  
Henrik Lund ◽  
Jabor Rabeah ◽  
...  
Keyword(s):  
Low Temperature ◽  
Synergistic Effect ◽  
Catalytic Performance ◽  
Surface Species ◽  
Nh3 Scr ◽  
Redox Couples ◽  
Scr Of No ◽  
Improved Performance

Inserting adjacent Mn3+/Mn2+ and VO3+/VO2+ redox couples in Ce1−xTixO2 improves catalytic performance.

scholarly journals Simultaneous oxidation of Hg0 and NH3-SCR of NO by nanophase Ce x Zr y Mn z O2 at low temperature: the interaction and mechanism

2018 ◽  
Vol 25 (15) ◽  
pp. 14471-14485 ◽  
Author(s):  
Wanrong Wu ◽  
Zheng Zeng ◽  
Pei Lu ◽  
Yi Xing ◽  
Jianjun Wei ◽  
...  
Keyword(s):  
Low Temperature ◽  
Nh3 Scr ◽  
Simultaneous Oxidation ◽  
Scr Of No
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