scholarly journals Promotional effect of niobium substitution on the low-temperature activity of a WO3/CeZrOxmonolithic catalyst for the selective catalytic reduction of NOxwith NH3

RSC Advances ◽  
2017 ◽  
Vol 7 (75) ◽  
pp. 47570-47582 ◽  
Author(s):  
Haidi Xu ◽  
Qingjin Lin ◽  
Yun Wang ◽  
Li Lan ◽  
Shuang Liu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Promising Candidate ◽  
Scr Catalyst ◽  
Promotional Effect

Optimal WO3substituted by Nb2O5could obviously improve the low-temperature NH3-SCR activity of WO3/Ce0.68Zr0.32O2, and the Nb-substituted catalyst showed excellent SO2and H2O tolerance could be a promising candidate for NH3-SCR catalyst.

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 The synthesis of CuyMnzAl1−zOx mixed oxide as a low-temperature NH3-SCR catalyst with enhanced catalytic performance

2018 ◽  
Vol 47 (9) ◽  
pp. 2992-3004 ◽  
Author(s):  
Qinghua Yan ◽  
Sining Chen ◽  
Lei Qiu ◽  
Yanshan Gao ◽  
Dermot O'Hare ◽  
...  
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Layered Double Hydroxides ◽  
Mixed Oxide ◽  
Catalytic Reduction ◽  
Catalytic Performance ◽  
Scr Catalyst ◽  
Nh3 Scr ◽  
New Type ◽  
Double Hydroxides

A new type of low-temperature selective catalytic reduction (SCR) catalyst, CuyMnzAl1−zOx, derived from layered double hydroxides is presented in this contribution.

Deactivation Mechanism of SCR Catalyst Based on Nano-ZrO2

2012 ◽  
Vol 465 ◽  
pp. 8-13
Author(s):  
Rong Liu ◽  
Zhi Qin Yang ◽  
Hao Guan
Keyword(s):  
Low Temperature ◽  
Metal Oxides ◽  
Selective Catalytic Reduction ◽  
Catalyst Deactivation ◽  
Catalytic Reduction ◽  
Good Activity ◽  
Scr Catalyst ◽  
Reduction Of No ◽  
Inactivation Mechanism ◽  
Ft Ir

A catalyst, 8%Fe-10%MnOx-CeO2/ZrO2, was prepared and applied for selective catalytic reduction of NO with NH3 at low temperature. The effects of SO2 and H2O on the catalyst were studied. The results showed that in the absence of SO2 and H2O, the catalyst 8%Fe-10%MnOx-CeO2/ZrO2 has good activity and stability. The presence of SO2 and H2O make the catalyst deactivate, and the activity can be recovered mostly by heating at 400°C. Properties of the catalyst on different reaction stages were characterized by FT-IR to study the inactivation mechanism of the catalyst. The results showed that the catalyst deactivation is due to the deposition of ammonium sulfate on the catalyst and the sulphation of the metal oxides of the catalyst.

Effect of Fe on the Selective Catalytic Reduction of NO by NH3 at Low Temperature over Mn/CeO2-TiO2 Catalyst

2012 ◽  
Vol 27 (5) ◽  
pp. 495-500 ◽  
Author(s):  
Da-Wang WU ◽  
Qiu-Lin ZHANG ◽  
Tao LIN ◽  
Mao-Chu GONG ◽  
Yao-Qiang CHEN
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Reduction Of No
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