Selective catalytic reduction of nitric oxide with ammonia over high-activity Fe/SSZ-13 and Fe/one-pot-synthesized Cu-SSZ-13 catalysts

2016 ◽  
Vol 6 (20) ◽  
pp. 7561-7568 ◽  
Author(s):  
Chengyang Yin ◽  
Peifu Cheng ◽  
Xiang Li ◽  
Ralph T. Yang
Keyword(s):  
Nitric Oxide ◽  
High Activity ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
One Pot ◽  
Catalytic Activities ◽  
Scr Of No

Fe-impregnated one-pot-synthesized Cu-SSZ-13 catalysts showed excellent catalytic activities for the selective catalytic reduction (SCR) of NO with ammonia.

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.

Cu-Supported on Sodium-Treated Sepiolite for Selective Catalytic Reduction of NO by Propylene

2015 ◽  
Vol 1088 ◽  
pp. 569-572
Author(s):  
Zhi Hao Zhang ◽  
Yang Li ◽  
Yun Fang Qi ◽  
Qing Ye ◽  
Shu Lan Ji ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
High Performance ◽  
Catalytic Reduction ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Redox Species ◽  
Reduction Of No ◽  
Catalytic Activities ◽  
Scr Of No ◽  
Activity Center

Cu/Na-Sep samples were prepared by the incipient wetness impregnation method. These catalysts were characterized by means of XRF, XRD, and XPS techniques, and their catalytic activities were performed by the SCR of NO with propylene. The results show that the Cu/Na-Sep catalyst exhibited the high performance in the C3H6-SCR of NO. After investigation by XRD and XPS, the result showed that there are Cu2+/Cu+redox species as a reaction activity center over Cu/Na-Sep.

Activity and SO2 resistance of amorphous CeaTiOx catalysts for the selective catalytic reduction of NO with NH3: in situ DRIFT studies

2016 ◽  
Vol 6 (19) ◽  
pp. 7151-7162 ◽  
Author(s):  
Zhiping Zhang ◽  
Liqiang Chen ◽  
Zhibin Li ◽  
Pengying Li ◽  
Fulong Yuan ◽  
...  
Keyword(s):  
High Activity ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Strong Interactions ◽  
Sulfur Resistance ◽  
Reduction Of No ◽  
Scr Of No ◽  
So2 Resistance ◽  
In Situ Drift

Amorphous Ce0.3TiOx exhibits a high activity and sulfur resistance for NH3-SCR of NO due to the strong interactions between Ce and Ti.

Cu-Supported on Acid-Treated Sepiolite: Characterization and Selective Catalytic Reduction (SCR) of NO by Propene

2015 ◽  
Vol 1092-1093 ◽  
pp. 976-979
Author(s):  
Yun Fang Qi ◽  
Yang Li ◽  
Zhi Hao Zhang ◽  
Li Sha Liu ◽  
Qing Ye ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
High Performance ◽  
Catalytic Reduction ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Redox Species ◽  
Catalytic Activities ◽  
Scr Of No ◽  
Activity Center ◽  
Hcl Solution

H-Sep samples were taken from treating sepiolite with HCl solution. Cu/H-Sep samples were prepared by the incipient wetness impregnation method. The samples were characterized using XRF, XRD, and XPS techniques, and their catalytic activities were performed by the SCR of NO with propylene. The results show that the Cu/H-Sep catalyst exhibited the high performance in the C3H6-SCR of NO. After investigation by XRD and H2-TPR, the result showed that there are Cu2+/Cu+redox species as a reaction activity center over Cu/H-Sep.

Alkali metal-resistant mechanism for selective catalytic reduction of nitric oxide over V2O5/HWO catalysts

Fuel ◽  
2021 ◽  
Vol 304 ◽  
pp. 121445
Author(s):  
Running Kang ◽  
Junyao He ◽  
Feng Bin ◽  
Baojuan Dou ◽  
Qinglan Hao ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Alkali Metal ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction

A Ce-Zr-Ti Oxide Catalyst for Selective Catalytic Reduction of NO with Ammonia

2014 ◽  
Vol 535 ◽  
pp. 709-712
Author(s):  
Ye Jiang ◽  
Yan Yan ◽  
Shan Bo Huang ◽  
Xiong Zhang ◽  
Xin Wei Wang ◽  
...  
Keyword(s):  
High Activity ◽  
Selective Catalytic Reduction ◽  
Oxide Catalyst ◽  
Catalytic Reduction ◽  
Space Velocity ◽  
Impregnation Method ◽  
Reduction Of No ◽  
No Conversion ◽  
Temperature Range ◽  
Ti Oxides

A Ce-Zr-Ti oxide catalyst was prepared by an impregnation method and tested for the selective catalytic reduction of NO with NH3. The Ce-Zr-Ti oxide catalyst exhibited high activity and more than 95% NO conversion was obtained within the temperature range 300-500 °C at the high gas hourly space velocity of 50,000 h-1. The addition of Zr improved the activity of Ce-Ti oxides especially at higher reaction temperatures and their resistance to SO2.

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