Selective catalytic reduction of NOx by methane over Co-H-MFI and Co-H-FER zeolite catalysts: characterisation and catalytic activity

2003 ◽  
Vol 214 (2) ◽  
pp. 179-190 ◽  
Author(s):  
C Resini
Keyword(s):  
Catalytic Activity ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Zeolite Catalysts ◽  
Reduction Of Nox

Recent advances in copper-based zeolite catalysts with low-temperature activity for the selective catalytic reduction of NOx with hydrocarbons

2020 ◽  
Vol 44 (3) ◽  
pp. 817-831 ◽  
Author(s):  
Junqiang Xu ◽  
Yahua Qin ◽  
Honglin Wang ◽  
Fang Guo ◽  
Jiaqing Xie
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Zeolite Catalysts ◽  
Design Strategies ◽  
Recent Advances ◽  
Reduction Of Nox

This paper highlights the design strategies of the copper-based zeolite catalysts with excellent catalytic activity at low temperature for HC-SCR.

The catalytic activity of CuSO4/ZrO2 for the selective catalytic reduction of NOx with NH3 in the presence of excess O2

2002 ◽  
Vol 36 (3) ◽  
pp. 217-230 ◽  
Author(s):  
Daniela Pietrogiacomi ◽  
Diana Sannino ◽  
Alessandro Magliano ◽  
Paolo Ciambelli ◽  
Simonetta Tuti ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Reduction Of Nox

scholarly journals The Enhanced Performance of N-Modified Activated Carbon Promoted with Ce in Selective Catalytic Reduction of NOx with NH3

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1423
Author(s):  
Marwa Saad ◽  
Agnieszka Szymaszek ◽  
Anna Białas ◽  
Bogdan Samojeden ◽  
Monika Motak
Keyword(s):  
Catalytic Activity ◽  
Activated Carbon ◽  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Catalytic Performance ◽  
Reduction Mechanism ◽  
Modified Activated Carbon ◽  
Oxidation Reduction ◽  
Reduction Of Nox

The goal of the study was to modify activated carbon (AC) with nitrogen groups and ceria and to test the obtained materials in low temperature selective catalytic reduction of nitrogen oxides. For that purpose, the starting AC was oxidized with HNO3 of various concentrations, modified with urea and doped with 0.5 wt.% of Ce. It was observed that the increased concentration of acid influenced the catalytic activity, since textural and surface chemistry of activated carbon was changed. The most active sample was that modified with 14 M HNO3 and it reached 96% of NO conversion at 300 °C. Additionally, the addition of Ce improved the catalytic performance of modified AC, and NO was reduced according to oxidation–reduction mechanism, characteristic for supported metal oxides. Nevertheless, the samples promoted with Ce emitted significantly higher amount of CO2 comparing to the non-promoted ones.

Computational Insights into the Mechanism of the Selective Catalytic Reduction of NOx: Fe- Versus Cu-Doped Zeolite Catalysts

2019 ◽  
Author(s):  
Julian Rudolph ◽  
Christoph R. Jacob
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Zeolite Catalysts ◽  
Reaction Pathways ◽  
Half Cycle ◽  
Computational Results ◽  
Comprehensive Picture ◽  
Cu Catalysts ◽  
Reduction Of Nox

<div> <div> <div> <p>We computationally investigate the mechanism of the reduction half-cycle of the selective catalytic reduction (SCR) of nitrogen oxides with ammonia. We compare both Fe- and Cu-doped zeolite catalysts and aim at exploring all accessible reaction pathways. From our calculations, a comprehensive picture emerges that unifies sev- eral previous mechanistic proposals. We find that both for Fe and for Cu catalysts, different reaction pathways are feasible, but some of the possible reaction pathways differ in these two cases. Our computational results provide a basis for the inter- pretation of in situ spectroscopic investigations that can possibly distinguish the different mechanistic pathways. </p> </div> </div> </div>

Operando Spatially- and Time-Resolved XAS Study on Zeolite Catalysts for Selective Catalytic Reduction of NOx by NH3

2014 ◽  
Vol 118 (19) ◽  
pp. 10204-10212 ◽  
Author(s):  
Dmitry E. Doronkin ◽  
Maria Casapu ◽  
Tobias Günter ◽  
Oliver Müller ◽  
Ronald Frahm ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Zeolite Catalysts ◽  
Time Resolved ◽  
Reduction Of Nox

scholarly journals Sm-doped manganese-based Zr–Fe polymeric pillared interlayered montmorillonite for low temperature selective catalytic reduction of NOx by NH3 in metallurgical sintering flue gas

RSC Advances ◽  
2018 ◽  
Vol 8 (73) ◽  
pp. 42017-42024 ◽  
Author(s):  
Zhicheng Han ◽  
Qingbo Yu ◽  
Zhijia Xue ◽  
Kaijie Liu ◽  
Qin Qin
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Flue Gas ◽  
Trace Amount ◽  
Catalytic Reduction ◽  
Excess Oxygen ◽  
Reduction Of Nox ◽  
Metallurgical Sintering Flue Gas

Trace amount of Sm-doped Mn-based Zr–Fe polymeric pillared interlayered montmorillonite promotes low temperature catalytic activity in excess oxygen.

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