Effect of Ag, Pd and Co promoters on the Selective Catalytic Reduction (SCR) of NOx by ethanol over sulfated ceria-zirconia catalysts

2012 ◽  
Vol 191 (1) ◽  
pp. 65-74 ◽  
Author(s):  
Alexandre Westermann ◽  
Bruno Azambre ◽  
Alain Koch
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Scr Of Nox

The synergistic effects between Ce and Cu in CuyCe1−yW5Ox catalysts for enhanced NH3-SCR of NOx and SO2 tolerance

2019 ◽  
Vol 9 (3) ◽  
pp. 718-730 ◽  
Author(s):  
Jian-Wen Shi ◽  
Yao Wang ◽  
Ruibin Duan ◽  
Chen Gao ◽  
Baorui Wang ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Synergistic Effects ◽  
Reduction Of No ◽  
Nh3 Scr ◽  
So2 Tolerance ◽  
Scr Of Nox

Non-manganese-based metal oxides are promising catalysts for the NH3-SCR (selective catalytic reduction) of NOx at low temperatures.

scholarly journals Investigation of Sulfated Iron-Based Catalysts with Different Sulfate Position for Selective Catalytic Reduction of NOx with NH3

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1035
Author(s):  
Baiyu Fan ◽  
Ziyin Zhang ◽  
Caixia Liu ◽  
Qingling Liu
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalyst Surface ◽  
Catalytic Reduction ◽  
Nh3 Adsorption ◽  
Reduction Of Nox ◽  
Iron Based ◽  
Redox Ability ◽  
Scr Of Nox ◽  
Iron Based Catalysts

The Fe/(SZr) and S(Fe/Zr) sulfated iron-based catalysts, prepared by impregnation methods through changing the loading order of Fe2O3 and SO42− on ZrO2, were investigated on selective catalytic reduction (SCR) of NOx by ammonia. It was studied that the existent forms of Fe2O3 and SO42− on the surface of catalysts were affected by the loading order. The Fe/(SZr) catalyst surface had isolated Fe2O3 and SO42− species and followed both the L-H mechanism and the E-R mechanism, whereas the S(Fe/Zr) catalyst contained SO42− specie and sulfate only and mainly followed the E-R pathway. These factors affected the redox ability and NH3 adsorption, which might be key to the SCR reaction.

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.

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NOx

ChemCatChem ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 1499-1511 ◽  
Author(s):  
Yu Liu ◽  
Jun Zhao ◽  
Jong-Min Lee
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
New Materials ◽  
Scr Of Nox

Recent advances in the preparation of zeolites for the selective catalytic reduction of NOx in diesel engines

2019 ◽  
Vol 4 (6) ◽  
pp. 975-985 ◽  
Author(s):  
Ling Zhang ◽  
Qinming Wu ◽  
Xiangju Meng ◽  
Ulrich Müller ◽  
Mathias Feyen ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Diesel Engines ◽  
Catalytic Reduction ◽  
Pore Sizes ◽  
Recent Advances ◽  
Small Pore ◽  
Reduction Of Nox ◽  
Scr Of Nox

Metal-exchanged zeolites with small pore sizes have attracted much attention in recent years due to their application in the selective catalytic reduction (SCR) of NOx in diesel engines.

Low Temperature Selective Catalytic Reduction of NOx with NH3 over MnOx /TiO2 Catalyst

2013 ◽  
Vol 295-298 ◽  
pp. 364-369 ◽  
Author(s):  
Jun Lin Xie ◽  
Zheng Bing Fu ◽  
Feng He ◽  
De Fang
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Manganese Oxides ◽  
Catalytic Reduction ◽  
Sol Gel ◽  
Soft Template ◽  
Excess Oxygen ◽  
Narrow Slit ◽  
Transport Pathways ◽  
Scr Of Nox

Amorphous phase MnOx/TiO2 catalysts were prepared by two different methods, their catalytic activities for low temperature selective catalytic reduction (SCR) of NOx with NH3 in the presence of excess oxygen were investigated. The catalysts were characterized by XRD, XPS and HRTEM. The results showed that the catalyst prepared by soft template method had better catalytic active than those prepared by sol-gel method, its catalytic property could reach 98.2% at 200°C. From the microstructure characterization, it could be known that the catalyst prepared by soft template had the shape of nanorod, this shape was contributed to the dispersion of the manganese oxides and possessed higher surface lattice oxygen concentration. Furthermore, narrow slit-shaped pores associated with rod-like particles could provide efficient transport pathways to reactant molecules and products. Due to these, the catalyst performed catalytic active very well.

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