Catalytic Reduction of NOx With NH3 Over CeO2 and SiO2 Supported Tungstophosphoric Acid: Promoting Effects of Ceria Support and Cobalt Proton Substitute

2021 ◽  
Author(s):  
Imane El Arrouji ◽  
Jamil Toyir ◽  
Cherif Larabi ◽  
Kai C. Szeto ◽  
Aimery de Mallmann ◽  
...  
Keyword(s):  
Catalytic Reduction ◽  
Tungstophosphoric Acid ◽  
Ceria Support ◽  
Reduction Of Nox

scholarly journals NH3-Selective Catalytic Reduction of NOx to N2 over Ceria Supported WOx Based Catalysts: Influence of Tungsten Content

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 950
Author(s):  
Imane El Arrouji ◽  
Cuirong Chen ◽  
Jamil Toyir ◽  
Cherif Larabi ◽  
Kai C. Szeto ◽  
...  
Keyword(s):  
High Temperature ◽  
Catalyst Surface ◽  
Catalytic Reduction ◽  
Tungstophosphoric Acid ◽  
Tungsten Content ◽  
Nh3 Scr ◽  
Tungsten Clusters ◽  
Reduction Of Nox ◽  
Series Of Experiments ◽  
Scr Of Nox

A series of HPW/CeO2 catalysts generated from 12-tungstophosphoric acid, H3PW12O40 (HPW), supported on ceria and presenting different tungsten loadings (2, 4.5, 9, 16, and 40 wt% W) were prepared and characterized by N2 physisorption, XRD, IR, Raman, and UV-Vis. The different characterization techniques suggested that low loading of tungsten resulted in mainly isolated sites, while high tungsten loading produced polymeric or tungsten clusters. Those materials exhibited high activity in NH3-SCR of NOx into N2. Moreover, the series of experiments indicated that low loading in tungsten (2% HPW/CeO2) displayed the highest activity with a remarkable N2 selectivity (99%) at medium-high temperature (300–515 °C), owing to the high amount of monomeric tungstate coverage on the catalyst surface.

Highly dispersed MnOx–FeOx supported by silicalite-1 for the selective catalytic reduction of NOx with NH3 at low temperatures

2020 ◽  
Vol 10 (16) ◽  
pp. 5525-5534 ◽  
Author(s):  
Jialiang Gu ◽  
Bingjun Zhu ◽  
Rudi Duan ◽  
Yan Chen ◽  
Shaoxin Wang ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Highly Dispersed ◽  
Reduction Of Nox

MnOx–FeOx-Loaded silicalite-1 catalysts exhibit high NOx conversion at low temperatures.

ChemInform Abstract: The Influence of Water on the Reactivity of Vanadia/Titania for Catalytic Reduction of NOx

ChemInform ◽  
2010 ◽  
Vol 23 (29) ◽  
pp. no-no
Author(s):  
N.-Y. TOPSOEE ◽  
T. SLABIAK ◽  
B. S. CLAUSEN ◽  
T. Z. SRNAK ◽  
J. A. DUMESIC
Keyword(s):  
Catalytic Reduction ◽  
Influence Of Water ◽  
Reduction Of Nox

Alkali-Resistant Catalytic Reduction of NOx via Naturally Coupling Active and Poisoning Sites

2021 ◽  
Author(s):  
Chong Feng ◽  
Penglu Wang ◽  
Xiangyu Liu ◽  
Fuli Wang ◽  
Tingting Yan ◽  
...  
Keyword(s):  
Catalytic Reduction ◽  
Reduction Of Nox

scholarly journals A study on the selective catalytic reduction of NOx by ammonia on sulphated iron-based catalysts

RSC Advances ◽  
2020 ◽  
Vol 10 (67) ◽  
pp. 40948-40959
Author(s):  
Caixia Liu ◽  
Huijun Wang ◽  
Yalian Bi ◽  
Ziyin Zhang
Keyword(s):  
Selective Catalytic Reduction ◽  
High Temperatures ◽  
Catalytic Reduction ◽  
Reduction Of Nox ◽  
Iron Based ◽  
Iron Based Catalysts

The roles of Fe3+ and SO42− are different at low and high temperatures due to their interaction. It is the appropriate contents of Fe3+ and SO42− that can result in high NH3-SCR activity at varying temperatures.

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