scholarly journals Influence of the nature and environment of manganese in Mn-BEA zeolites on NO conversion in selective catalytic reduction with ammonia

2017 ◽  
Vol 19 (21) ◽  
pp. 13553-13561 ◽  
Author(s):  
R. Baran ◽  
L. Valentin ◽  
J.-M. Krafft ◽  
T. Grzybek ◽  
P. Glatzel ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Synthesis Method ◽  
Reduction Of No ◽  
No Conversion ◽  
Post Synthesis

Manganese-containing BEA zeolites, MnxSiBEA (x = 1–4 wt%) and Mn(I.E.)AlBEA, were prepared by a two-step post-synthesis method and a conventional wet ion-exchange, respectively, and applied as catalysts in the selective catalytic reduction of NO with ammonia (NH3-SCR).

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.

Highly dispersed Fe2O3 on carbon nanotubes for low-temperature selective catalytic reduction of NO with NH3

2015 ◽  
Vol 51 (5) ◽  
pp. 956-958 ◽  
Author(s):  
Zhenping Qu ◽  
Lei Miao ◽  
Hui Wang ◽  
Qiang Fu
Keyword(s):  
Carbon Nanotubes ◽  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Reduction Of No ◽  
No Conversion ◽  
Highly Dispersed

Highly dispersed Fe2O3 nanoparticles supported on CNTs showed excellent NO conversion, selectivity and durability towards SO2/H2O at low temperatures (200–325 °C).

Synthesis, characterization and catalytic performances of Cu- and Mn-containing ordered mesoporous carbons for the selective catalytic reduction of NO with NH3

2015 ◽  
Vol 5 (2) ◽  
pp. 1267-1279 ◽  
Author(s):  
Feifei Cao ◽  
Jinghuan Chen ◽  
Changlei Lyu ◽  
Mingjiang Ni ◽  
Xiang Gao ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Effect ◽  
Catalytic Reduction ◽  
Mesoporous Carbons ◽  
Ordered Mesoporous Carbons ◽  
Reduction Of No ◽  
No Conversion ◽  
Ordered Mesoporous ◽  
Catalytic Performances

The synergetic catalytic effect of Cu and Mn for CuxMny-OMCs catalysts on NO conversion with NH3.

scholarly journals Physicochemical and Catalytic Properties of Vanadia/Titania Catalysts. V. Selective Catalytic Reduction of NO with NH3

2002 ◽  
Vol 20 (10) ◽  
pp. 937-945
Author(s):  
Th. El-Nabarawy ◽  
M.N. Alaya ◽  
S.A. Sayed Ahmed ◽  
A.M. Youssef
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Properties ◽  
Catalytic Reduction ◽  
Impregnation Method ◽  
Reduction Of No ◽  
No Conversion ◽  
Scr Of No ◽  
Monolayer Coverage

Vanadia/titania catalysts were prepared containing 6.0 or 8.0 wt% V2O5 via the impregnation method. The samples as prepared were calcined at 400°C or 600°C, respectively. Selective catalytic reduction (SCR) of NO with NH3 was carried out at 257°C over the prepared catalysts. NO conversion as a function of time was followed and the stationary conversion versus the amount of catalyst employed was also investigated. It was found that the vanadia/titania catalysts calcined at 400°C were more active in the SCR of NO with NH3 relative to those calcined at 600°C. This was attributed to such catalysts possessing complete monolayer coverage of vanadia on the titania substrate. It was established that V5+ was not the active vanadia species but V4+ and V3+ may act as such for the SCR of NO with NH3.

scholarly journals Selective catalytic reduction of NO by NH3 with WO3-TiO2 catalysts: Influence of catalyst synthesis method

2016 ◽  
Vol 188 ◽  
pp. 123-133 ◽  
Author(s):  
Yuanyuan He ◽  
Michael E. Ford ◽  
Minghui Zhu ◽  
Qingcai Liu ◽  
Zili Wu ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Synthesis Method ◽  
Catalyst Synthesis ◽  
Reduction Of No

Ammonia selective catalytic reduction of NO over Ce–Fe/Cu–SSZ-13 catalysts

RSC Advances ◽  
2015 ◽  
Vol 5 (104) ◽  
pp. 85453-85459 ◽  
Author(s):  
Xiaojiao Liu ◽  
Yonghong Li ◽  
Ranran Zhang
Keyword(s):  
Catalytic Activity ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Reduction Of No ◽  
No Conversion ◽  
Operation Temperature ◽  
Temperature Window

Ce0.017–Fe0.017/Cu–SSZ-13 showed the best catalytic activity in a wider operation temperature window from 150 to 550 °C. The NO conversion over Ce0.017–Fe0.017/Cu–SSZ-13 was more than 90% between 200 and 500 °C.

Direct Cu2+ ion-exchanged into as-synthesized SAPO-34 and its catalytic application in the selective catalytic reduction of NO with NH3

RSC Advances ◽  
2016 ◽  
Vol 6 (15) ◽  
pp. 12544-12552 ◽  
Author(s):  
Xiao Xiang ◽  
Miao Yang ◽  
Beibei Gao ◽  
Yuyan Qiao ◽  
Peng Tian ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Reduction Of No ◽  
Catalytic Application

A facile and direct ion-exchange (DIE) method has been developed to prepare Cu-exchanged SAPO-34s, in which as-synthesized SAPO-34 is used as a precursor.

Synthesis of MnNi–SAPO-34 by a one-pot hydrothermal method and its excellent performance for the selective catalytic reduction of NO by NH3

2017 ◽  
Vol 7 (21) ◽  
pp. 4984-4995 ◽  
Author(s):  
Rui Li ◽  
Zhibin Li ◽  
Liqiang Chen ◽  
Yongli Dong ◽  
Shibo Ma ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Selective Catalytic Reduction ◽  
Hydrothermal Method ◽  
Strong Interaction ◽  
Catalytic Reduction ◽  
Synthesis Method ◽  
Excellent Performance ◽  
One Pot ◽  
Reduction Of No ◽  
Ni Species

MnNi–SAPO-34 with Mn and Ni incorporated in the framework of SAPO-34 prepared by a one-pot hydrothermal synthesis method exhibits excellent NH3-SCR activity, which is attributed to the strong interaction between the Mn and Ni species.

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