Effect of preparation methods on selective catalytic reduction of NOx with NH3 over manganese oxide octahedral molecular sieves

2014 ◽  
Vol 42 (11) ◽  
pp. 1357-1364 ◽  
Author(s):  
Yan-cai WANG ◽  
Xin LIU ◽  
Ping NING ◽  
Qiu-lin ZHANG ◽  
Jin-hui ZHANG ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Selective Catalytic Reduction ◽  
Molecular Sieves ◽  
Catalytic Reduction ◽  
Preparation Methods ◽  
Octahedral Molecular Sieves ◽  
Reduction Of Nox

scholarly journals Low-Temperature Selective Catalytic Reduction of NOx on MnO2 Octahedral Molecular Sieves (OMS-2) Doped with Co

Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 396 ◽  
Author(s):  
Laichao Li ◽  
Yusi Wang ◽  
Li Zhang ◽  
Yuxi Yu ◽  
Hanbing He
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Molecular Sieves ◽  
Catalytic Reduction ◽  
Selective Reduction ◽  
Reduction Reaction ◽  
Sulfur Resistance ◽  
No Conversion ◽  
Reduction Of Nox ◽  
Doping Ratio

To improve NO conversion and sulfur resistance of low-temperature NO-CO selective catalytic reduction (SCR), it is urgent to seek new catalyst materials. Herein, using the pre-doping method, Cox-OMS-2 with different ratios of cobalt (Co) was obtained during hydrothermal synthesis of OMS-2 molecular sieves (where x represents the doping ratio of Co, i.e., x = 0.1, 0.2, 0.3, 0.4). Co was found to very efficiently intercalate into the crystal structure of OMS-2. Co and Mn work together to promote the selective reduction reaction of NOx;; the NO conversion of Co0.3-OMS-2 was the highest among all samples. Specifically, NO conversion at 50 °C increased from 72% for undoped OMS-2 to 90% for Co0.3-OMS-2. Moreover, due to the incorporation of Co, the latter also showed better sulfur resistance.

scholarly journals The Latest Research Progress of NH3-SCR in the SO2 Resistance of the Catalyst in Low Temperatures for Selective Catalytic Reduction of NOx

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1034 ◽  
Author(s):  
Caixia Liu ◽  
Huijun Wang ◽  
Ziyin Zhang ◽  
Qingling Liu
Keyword(s):  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Complex Oxide ◽  
Research Progress ◽  
Preparation Methods ◽  
Nh3 Scr ◽  
So2 Resistance ◽  
Reduction Of Nox ◽  
Further Development

The selective catalytic reduction (SCR) has been widely used in industrial denitrification owing to its high denitrification efficiency, low operating costs, and simple operating procedures. However, coal containing a large amount of sulfur will produce SO2 during combustion, which makes the catalyst easy to be deactivated, thus limiting the application of this technology. This review summarizes the latest NH3-SCR reaction mechanisms and the deactivation mechanism of catalyst in SO2-containing flue gas. Some strategies are summarized for enhancing the poison-resistance through modification, improvement of support, the preparation of complex oxide catalyst, optimizing the preparation methods, and acidification. The mechanism of improving sulfur resistance of catalysts at low temperatures is summarized, and the further development of the catalyst is also prospected. This paper could provide a reference and guidance for the development of SO2 resistance of the catalyst at low temperatures.

scholarly journals Effect of preparation methods on the activity of VOx/CeO2 catalysts for the selective catalytic reduction of NOx with NH3

2015 ◽  
Vol 5 (1) ◽  
pp. 389-396 ◽  
Author(s):  
Zhihua Lian ◽  
Fudong Liu ◽  
Hong He
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Preparation Methods ◽  
Homogeneous Precipitation Method ◽  
Reduction Of Nox

VOx/CeO2 catalysts prepared by a homogeneous precipitation method exhibited high NOx conversion and strong SO2 resistance in NH3-SCR reaction.

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