Improved Low‐Temperature Activity and H 2 O Resistance of Fe‐Doped Mn−Eu Catalysts for NO Removal by NH 3 −SCR

ChemCatChem ◽  
2019 ◽  
Vol 11 (19) ◽  
pp. 4954-4965 ◽  
Author(s):  
Mingyu Guo ◽  
Peipei Zhao ◽  
Qingling Liu ◽  
Caixia Liu ◽  
Jinfeng Han ◽  
...  
Keyword(s):  
Low Temperature ◽  
No Removal

Excellent low-temperature NH3-SCR NO removal performance and enhanced H2O resistance by Ce addition over the Cu0.02Fe0.2CeyTi1-yOx (y = 0.1, 0.2, 0.3) catalysts

Chemosphere ◽  
2020 ◽  
Vol 243 ◽  
pp. 125309 ◽  
Author(s):  
Shibo Ma ◽  
Huansheng Tan ◽  
Yushi Li ◽  
Peiqiang Wang ◽  
Chen Zhao ◽  
...  
Keyword(s):  
Low Temperature ◽  
No Removal ◽  
Nh3 Scr ◽  
Scr No

Enhancement of low-temperature activity and sulfur resistance of Fe 0.3 Mn 0.5 Zr 0.2 catalyst for NO removal by NH 3 -SCR

2017 ◽  
Vol 325 ◽  
pp. 114-123 ◽  
Author(s):  
Ningjie Fang ◽  
Jiaxiu Guo ◽  
Song Shu ◽  
Hongdi Luo ◽  
Yinghao Chu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Sulfur Resistance ◽  
No Removal

A Novel MnOx Supported Palygorskite SCR Catalyst for Lower Temperature NO Removal from Flue Gases

2011 ◽  
Vol 356-360 ◽  
pp. 974-979 ◽  
Author(s):  
Xian Long Zhang ◽  
Bo Wen Shi ◽  
Xue Ping Wu ◽  
Wei Ping Jiang ◽  
Bao Jun Yang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Manganese Oxide ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Flue Gases ◽  
Scr Catalyst ◽  
No Removal ◽  
Highly Active ◽  
Lower Temperature ◽  
Scr Of Nox

Palygorskite supported manganese oxide catalysts (MnOx/PG) were prepared for lower temperature selective catalytic reduction (SCR) of NOx by NH3. Catalyst’s SCR activity was estimated at varied temperatures. Catalyst’s properties were characterized by XRD, NH3adsorption and TPD. Results showed that MnOx/PG catalyst was highly active for SCR at low-temperature. It was also found that NH3 was mainly adsorbed on palygorskite in two forms. Weakly adsorbed NH3, which was seldom inhibited by loading of MnOx, but was more favorable to SCR. Whereas strongly adsorbed NH3was more likely to be inhibited by MnOx loading but was inessential for SCR.

Suitability of pyrolusite as additive to activated coke for low‐temperature NO removal

2017 ◽  
Vol 93 (3) ◽  
pp. 690-697 ◽  
Author(s):  
Lin Yang ◽  
Wenju Jiang ◽  
Lu Yao ◽  
Xia Jiang ◽  
Jianjun Li
Keyword(s):  
Low Temperature ◽  
No Removal ◽  
Activated Coke

Promotion of Cerium Oxide as Additive over MnOx/PG SCR Catalysts for Low Temperature Flue Gas NO Removal

2013 ◽  
Vol 726-731 ◽  
pp. 2264-2269 ◽  
Author(s):  
Xian Long Zhang ◽  
Lian Feng Zhang ◽  
Heng Jian Zhang ◽  
Xue Ping Wu ◽  
Jun Nan Cheng ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cerium Oxide ◽  
Flue Gas ◽  
Manganese Oxides ◽  
Catalytic Reduction ◽  
Active Species ◽  
No Removal ◽  
Cerium Content ◽  
Scr Catalysts ◽  
The Stability

Manganese oxides supported palygorskite (MnOx/PG) catalysts used for low-temperature selective catalytic reduction of NO with NH3was modified by doping cerium oxide as additive for enhancement of its performance. The effects of doped cerium content on catalysts' activity were investigated. It was found that the NO removal efficiency of Mn8Ce5/PG catalyst was remarkably higher than Mn8/PG catalyst especially at low temperatures, revealing that the addition of cerium oxide effectively enhanced the catalysts' SCR activity. Catalysts were characterized by BET, XRD, XPS to explore the relation between structural properties and increasing in SCR activity via modification. Results showed that the doping of cerium oxide has improved the dispersion of manganese oxides as active species. And furthermore, the stability of surface MnO2was also improved which was suggested to be the main reason for the enhancement of catalysts' activity.

scholarly journals NO Removal by Plasma-Enhanced NH3-SCR Using Methane as an Assistant Reduction Agent at Low Temperature

2019 ◽  
Vol 9 (13) ◽  
pp. 2751 ◽  
Author(s):  
Weixuan Zhao ◽  
Yanghaichao Liu ◽  
Heng Wei ◽  
Renxi Zhang ◽  
Gang Luo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Reaction System ◽  
Excess Oxygen ◽  
Nox Removal ◽  
No Removal ◽  
Promotion Effect ◽  
Nh3 Scr ◽  
O2 Concentration ◽  
New Process ◽  
Better Than

The effects of using CH4 as an assistant reduction agent in plasma-assisted NH3–SCR were investigated. The new hybrid reaction system performed better than DBD–NH3–SCR when the O2 concentration varied from 2% to 12%. Compared with DBD–NH3–SCR, DBD–NH3–CH4–SCR (NH3:CH4 = 1:1) showed a more significant promotion effect on the performance and N2 selectivity for NOX abatement. When the O2 concentration was 6% and the SIE was 512 J/L, the NO removal efficiency of the new hybrid system reached 84.5%. The outlet gas components were observed via FTIR to reveal the decomposition process and its mechanism. This work indicated that CH4, as an assistant agent, enhances DBD–NH3–SCR in excess oxygen to achieve a new process with significantly higher activity at a low temperature (≤348 K) for NOX removal.

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