Partial Oxidation of NO by H2O2 and afterward Reduction by NH3-Selective Catalytic Reduction: An Efficient Method for NO Removal

2020 ◽  
Vol 59 (20) ◽  
pp. 9393-9397 ◽  
Author(s):  
Zongguo Xue ◽  
Xuesen Du ◽  
Vladislav Rac ◽  
Vesna Rakic ◽  
Xiangmin Wang ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Partial Oxidation ◽  
Efficient Method ◽  
Catalytic Reduction ◽  
No Removal ◽  
Oxidation Of No

Mechanistic Studies of NH3-Assisted Reduction of Mononuclear Cu(II) Cation Sites in Cu-CHA Zeolites

2021 ◽  
Author(s):  
Laura Wilcox ◽  
Siddarth Krishna ◽  
Casey Jones ◽  
Rajamani Gounder
Keyword(s):  
Selective Catalytic Reduction ◽  
Partial Oxidation ◽  
Redox Reactions ◽  
Catalytic Reduction ◽  
Mechanistic Studies ◽  
Oxidation Of Hydrocarbons ◽  
Scr Of No ◽  
Cation Sites

Cu-exchanged zeolites catalyze various redox reactions including the selective catalytic reduction (SCR) of NOx with NH3 and the partial oxidation of hydrocarbons. The reduction of Cu(II) cations to Cu(I) by...

Optimization of Internals for Selective Catalytic Reduction (SCR) for NO Removal

2011 ◽  
Vol 45 (8) ◽  
pp. 3437-3444 ◽  
Author(s):  
Zhigang Lei ◽  
Cuiping Wen ◽  
Biaohua Chen
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
No Removal

scholarly journals A review of carbon-based and non-carbon-based catalyst supports for the selective catalytic reduction of nitric oxide

2018 ◽  
Vol 9 ◽  
pp. 740-761 ◽  
Author(s):  
Shahreen Binti Izwan Anthonysamy ◽  
Syahidah Binti Afandi ◽  
Mehrnoush Khavarian ◽  
Abdul Rahman Bin Mohamed
Keyword(s):  
Nitric Oxide ◽  
Selective Catalytic Reduction ◽  
Chemical Structure ◽  
Catalytic Reduction ◽  
Catalyst Supports ◽  
Future Directions ◽  
Preparation Methods ◽  
No Removal ◽  
Highly Correlated ◽  
Carbon Based

Various types of carbon-based and non-carbon-based catalyst supports for nitric oxide (NO) removal through selective catalytic reduction (SCR) with ammonia are examined in this review. A number of carbon-based materials, such as carbon nanotubes (CNTs), activated carbon (AC), and graphene (GR) and non-carbon-based materials, such as Zeolite Socony Mobil–5 (ZSM-5), TiO2, and Al2O3 supported materials, were identified as the most up-to-date and recently used catalysts for the removal of NO gas. The main focus of this review is the study of catalyst preparation methods, as this is highly correlated to the behaviour of NO removal. The general mechanisms involved in the system, the Langmuir–Hinshelwood or Eley–Riedeal mechanism, are also discussed. Characterisation analysis affecting the surface and chemical structure of the catalyst is also detailed in this work. Finally, a few major conclusions are drawn and future directions for work on the advancement of the SCR-NH3 catalyst are suggested.

NO removal in excess oxygen by plasma-enhanced selective catalytic reduction

2002 ◽  
Vol 75 (1-4) ◽  
pp. 325-330 ◽  
Author(s):  
H Miessner ◽  
K.-P Francke ◽  
R Rudolph ◽  
Th Hammer
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Excess Oxygen ◽  
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.

scholarly journals Selective Catalytic Reduction of NO by NH3 Using a Combination of Non-Thermal Plasma and Mn-Cu/ZSM5 Catalyst

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1044
Author(s):  
Tao Zhu ◽  
Xing Zhang ◽  
Wenfeng Niu ◽  
Yatao Liu ◽  
Bo Yuan ◽  
...  
Keyword(s):  
Energy Density ◽  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Removal Efficiency ◽  
Thermal Plasma ◽  
Catalytic Reduction ◽  
Catalytic Performance ◽  
High Energy ◽  
No Removal ◽  
Non Thermal Plasma

Dielectric barrier discharge (DBD) could generate non-thermal plasma (NTP) with the advantage of fast reactivity and high energy under atmosphere pressure and low-temperature. The presented work investigated the selective catalytic reduction (SCR) of nitric oxide (NO) using a combination of NTP and an Mn-Cu/ZSM5 catalyst with ammonia (NH3) as a reductant. The experimental results illustrate that the plasma-assisted SCR process enhances the low-temperature catalytic performance of the Mn-Cu/ZSM5 catalyst significantly, and it exhibits an obvious improvement in the NO removal efficiency. The reaction temperature is maintained at 200 °C in order to simulate the exhaust temperature of diesel engine, and the 10% Mn-8% Cu/ZSM5 catalyst shows the highest NO removal performance with about 93.89% at an energy density of 500 J L−1 and the selectivity to N2 is almost 99%. The voltage, frequency and energy density have a positive correlation to NO removal efficiency, which is positively correlated with the power of NTP system. In contrast, the O2 concentration has a negative correlation to the NO removal, and the NO removal efficiency cannot be improved when the NO removal process reaches reaction equilibrium in the NTP system.

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