Promotional effect of iron oxide on the catalytic properties of Fe–MnOx/TiO2 (anatase) catalysts for the SCR reaction at low temperatures

2016 ◽  
Vol 6 (6) ◽  
pp. 1772-1778 ◽  
Author(s):  
Shengcai Deng ◽  
Ke Zhuang ◽  
Bolian Xu ◽  
Yuanhua Ding ◽  
Lei Yu ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Iron Oxide ◽  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Properties ◽  
Catalytic Reduction ◽  
Surface Interaction ◽  
Tio2 Anatase ◽  
Promotional Effect

The surface interaction of the iron-improved MnOx/TiO2 (anatase) catalyst for the selective catalytic reduction of nitric oxide was studied. The role of iron was investigated through detailed experiments.

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.

Sign in / Sign up

Export Citation Format

Share Document