Widened Active Temperature Window of a Fe-ZSM-5 Catalyst by an Impregnation Solvent for NH3-SCR of NO

2018 ◽  
Vol 57 (41) ◽  
pp. 13703-13712 ◽  
Author(s):  
Jin Shi ◽  
Yi Zhang ◽  
Zeyun Fan ◽  
Mingxia Chen ◽  
Zhixiang Zhang ◽  
...  
Keyword(s):  
Nh3 Scr ◽  
Scr Of No ◽  
Temperature Window ◽  
Active Temperature

Transition metal ions regulate the catalytic performance of Ti0.8M0.2Ce0.2O2+x for the NH3-SCR of NO: the acidic mechanism

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7597-7603 ◽  
Author(s):  
Yuesong Shen ◽  
Yun Su ◽  
Yifan Ma
Keyword(s):  
Transition Metal Ions ◽  
Catalytic Performance ◽  
Acid Sites ◽  
Acid Strength ◽  
Maximum Activity ◽  
Lewis Acid Sites ◽  
Nh3 Scr ◽  
Scr Of No ◽  
Temperature Window ◽  
Active Temperature

The maximum activity is dependent on the number of Lewis acid sites, and the active temperature window is dependent on the acid strength.

scholarly journals VOX supported on TiO2–Ce0.9Zr0.1O2 core–shell structure catalyst for NH3-SCR of NO

RSC Advances ◽  
2019 ◽  
Vol 9 (52) ◽  
pp. 30340-30349 ◽  
Author(s):  
Lvesheng Sun ◽  
Shunxin Cao ◽  
Yun Huang ◽  
Yiming Zhang ◽  
Youhong Xiao ◽  
...  
Keyword(s):  
High Activity ◽  
Shell Structure ◽  
Core Shell ◽  
Nh3 Scr ◽  
Scr Of No ◽  
Temperature Window ◽  
Core Shell Structure

VOX/TiO2–Ce0.9Zr0.1O2 catalyst exhibits high activity and selectivity in a wide temperature window.

Tailored activity of Ce–Ni bimetallic modified V2O5/TiO2 catalyst for NH3-SCR with promising wide temperature window

Vacuum ◽  
2021 ◽  
pp. 110384
Author(s):  
Junqiang Xu ◽  
Xianlin Zou ◽  
Guorong Chen ◽  
Yanrong Zhang ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Tio2 Catalyst ◽  
Nh3 Scr ◽  
Temperature Window

Lead poisoning and regeneration of Mn-Ce/TiO2 catalysts for NH3-SCR of NO at low temperature

2021 ◽  
Vol 49 (1) ◽  
pp. 113-120
Author(s):  
Dong-jie YAN ◽  
Tong GUO ◽  
Ya YU ◽  
Zhao-hui CHEN
Keyword(s):  
Low Temperature ◽  
Lead Poisoning ◽  
Nh3 Scr ◽  
Scr Of No

scholarly journals Novel Preparation of Cu and Fe Zirconia Supported Catalysts for Selective Catalytic Reduction of NO with NH3

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 55
Author(s):  
Katarzyna Świrk ◽  
Ye Wang ◽  
Changwei Hu ◽  
Li Li ◽  
Patrick Da Costa ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Supported Catalysts ◽  
Catalytic Performance ◽  
Experimental Conditions ◽  
One Pot ◽  
Nh3 Scr ◽  
Scr Of No ◽  
Temperature Programmed ◽  
Stationary Sources

Copper and iron promoted ZrO2 catalysts were prepared by one-pot synthesis using urea. The studied catalysts were characterized by XRD, N2 physisorption, XPS, temperature-programmed desorption of NH3 (NH3-TPD), and tested by the selective catalytic reduction by ammonia (NH3-SCR) of NO in the absence and presence of water vapor, under the experimental conditions representative of exhaust gases from stationary sources. The influence of SO2 on catalytic performance was also investigated. Among the studied catalysts, the Fe-Zr sample showed the most promising results in NH3-SCR, being active and highly selective to N2. The addition of SO2 markedly improved NO and NH3 conversions during NH3-SCR in the presence of H2O. The improvement in acidic surface properties is believed to be the cause.

Nb2O5-modified Mn-Ce/AC catalyst with high ZnCl2 and SO2 tolerance for low-temperature NH3-SCR of NO

2021 ◽  
Vol 9 (5) ◽  
pp. 106323
Author(s):  
Yuhan Zhou ◽  
Buxin Su ◽  
Shan Ren ◽  
Zhichao Chen ◽  
Zenghui Su ◽  
...  
Keyword(s):  
Low Temperature ◽  
Nh3 Scr ◽  
Scr Of No ◽  
So2 Tolerance

Theoretical guidance and experimental confirmation on catalytic tendency of M-CeO2 (M = Zr, Mn, Ru or Cu) for NH3-SCR of NO

2017 ◽  
Vol 43 (13-16) ◽  
pp. 1240-1246 ◽  
Author(s):  
Phornphimon Maitarad ◽  
Jin Han ◽  
Supawadee Namuangruk ◽  
Liyi Shi ◽  
Chirawat Chitpakdee ◽  
...  
Keyword(s):  
Experimental Confirmation ◽  
Nh3 Scr ◽  
Scr Of No

scholarly journals Catalytic Activity Of Cu/η-Al2O3 Catalysts Prepared From Aluminum Scraps In The NH3-SCO and in the NH3-SCR of NO

2021 ◽  
Author(s):  
Nawel Jr ◽  
Thabet Makhlouf ◽  
Gerard Delahay ◽  
Hassib Tounsi
Keyword(s):  
Catalytic Oxidation ◽  
Catalytic Reduction ◽  
Impregnation Method ◽  
Wet Impregnation ◽  
Reduction Of No ◽  
Evaporation Method ◽  
Nh3 Scr ◽  
Scr Of No ◽  
Selective Catalytic Oxidation ◽  
Wet Impregnation Method

Abstract Copper loaded η-alumina catalysts with different copper contents have been prepared by impregnation/evaporation method. The catalysts were characterized by XRD, FTIR, BET, UV–vis, H2-TPR and evaluated in the selective catalytic reduction of NO by NH3 and in the selective catalytic oxidation of NH3. The characterization techniques showed that the impregnation/evaporation method permits to obtain highly dispersed copper oxide species on the η-alumina surface when low amount of copper is used (1wt. % and 2 wt.%). The wet impregnation method made it possible to reach a well dispersion of the copper species on the surface of the alumina for the low copper contents Cu(1)-Al2O3 and Cu(2)-Al2O3. The latter justifies the similar behavior of Cu(1)-Al2O3) and Cu(2)-Al2O3 in the selective catalytic oxidation of NH3 where these catalysts exhibit a conversion of NH3 to N2 of the order of 100% at T > 500°C.

Time-resolved in situ DRIFTS study on NH3–SCR of NO on CeO2/TiO2 catalyst

2022 ◽  
Author(s):  
Jie Yang ◽  
Shan Ren ◽  
Mingming Wang ◽  
Zhicaho Chen ◽  
Lin Chen ◽  
...  
Keyword(s):  
Nitrogen Oxides ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Time Resolved ◽  
In Situ Drifts ◽  
Tio2 Catalyst ◽  
Nh3 Scr ◽  
Scr Of No

Ce–Ti catalysts were considered as promising replacement for V–Ti based catalysts for selective catalytic reduction (SCR) of nitrogen oxides (NO and NO2) with NH3. In this work, CeO2/TiO2 catalyst was...

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