Catalytic role of vanadium(V) sulfate on activated carbon for SO2 oxidation and NH3-SCR of NO at low temperatures

2014 ◽  
Vol 56 ◽  
pp. 23-26 ◽  
Author(s):  
Wen Jing ◽  
Qianqian Guo ◽  
Yaqin Hou ◽  
Guoqiang Ma ◽  
Xiaojin Han ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Low Temperatures ◽  
So2 Oxidation ◽  
Nh3 Scr ◽  
Scr Of No ◽  
Catalytic Role

Role of sulphates on the mechanism of NH3-SCR of NO at low temperatures over presulphated vanadium supported on carbon-coated monoliths

2005 ◽  
Vol 233 (1) ◽  
pp. 166-175 ◽  
Author(s):  
E GARCIABORDEJE ◽  
J PINILLA ◽  
M LAZARO ◽  
R MOLINER ◽  
J FIERRO
Keyword(s):  
Low Temperatures ◽  
Nh3 Scr ◽  
Scr Of No ◽  
Carbon Coated

Inhibitory role of excessive NH3 in NH3-SCR on CeWOx at low temperatures

2020 ◽  
Vol 10 (9) ◽  
pp. 2758-2762 ◽  
Author(s):  
Kuo Liu ◽  
Yanlong Huo ◽  
Zidi Yan ◽  
Wenpo Shan ◽  
Hong He
Keyword(s):  
Low Temperatures ◽  
Inhibitory Effect ◽  
Nh3 Scr ◽  
Inhibitory Role ◽  
Standard Scr

An inhibitory effect of excessive NH3 on NH3-SCR on CeWOx at low temperatures was found, and H2O rendered the inhibitory effect insignificant for standard SCR.

SO2 promoted V2O5-MoO3/TiO2 catalyst for NH3-SCR of NO at low temperatures

2019 ◽  
Vol 570 ◽  
pp. 42-50 ◽  
Author(s):  
Yunfan Xu ◽  
Xiaodong Wu ◽  
Qiwei Lin ◽  
Jianfeng Hu ◽  
Rui Ran ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Tio2 Catalyst ◽  
Nh3 Scr ◽  
Scr Of No

On the nature of oxygen groups for NH3-SCR of NO over carbon at low temperatures

2015 ◽  
Vol 270 ◽  
pp. 41-49 ◽  
Author(s):  
Qianqian Guo ◽  
Wen Jing ◽  
Yaqin Hou ◽  
Zhanggen Huang ◽  
Guoqiang Ma ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Nh3 Scr ◽  
Scr Of No ◽  
Oxygen Groups

Catalyzed ozonation process with GAC and metal doped-GAC for removing organic pollutants

2004 ◽  
Vol 49 (4) ◽  
pp. 45-49 ◽  
Author(s):  
B.S. Oh ◽  
S.J. Song ◽  
E.T. Lee ◽  
H.J. Oh ◽  
J.W. Kang
Keyword(s):  
Activated Carbon ◽  
Catalyst System ◽  
Catalytic Performance ◽  
Oh Radicals ◽  
Ozone Decomposition ◽  
Depletion Rate ◽  
Catalytic Role ◽  
Ph Conditions ◽  
Metal Doped

The purpose of this study was to investigate the catalytic role of granular activated carbon (GAC), and metal (Mn or Fe) doped-GAC, on the transformation of ozone into more reactive secondary radicals, such as hydroxyl radicals (.OH), for the treatment of wastewater. The GAC doped with Mn showed the highest catalytic performance in terms of ozone decomposition into OH radicals. Likewise, activated carbon alone accelerated the ozone decomposition, resulting in the formation of .OH radicals. In the presence of promoters, the ozone depletion rate was enhanced further by the Mn-GAC catalyst system, even under aqueous acidic pH conditions.

scholarly journals Cu-IM-5 as the Catalyst for Selective Catalytic Reduction of NOx with NH3: Role of Cu Species and Reaction Mechanism

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 221
Author(s):  
Guangying Fu ◽  
Junwen Chen ◽  
Yuqian Liang ◽  
Rui Li ◽  
Xiaobo Yang ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Oxidation Activity ◽  
Paramagnetic Resonance ◽  
Nh3 Scr ◽  
Nh3 Oxidation ◽  
Diffuse Reflectance Infrared

The role of Cu species in Cu ion-exchanged IM-5 zeolite (Cu-IM-5) regarding the performance in selective catalytic reduction (SCR) of NOx with NH3 (NH3-SCR) and the reaction mechanism was studied. Based on H2 temperature-programmed reduction (H2-TPR) and electron paramagnetic resonance (EPR) results, Cu–O–Cu and isolated Cu species are suggested as main Cu species existing in Cu-IM-5 and are active for SCR reaction. Cu–O–Cu species show a good NH3-SCR activity at temperatures below 250 °C, whereas their NH3 oxidation activity at higher temperatures hinders the SCR performance. At low temperatures, NH4NO3 and NH4NO2 are key reaction intermediates. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) suggests a mixed Eley–Rideal (E–R) and Langmuir–Hinshelwood (L–H) mechanism over Cu-IM-5 at low temperatures.

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