Progressive regulation of Al sites and Cu distribution to increase hydrothermal stability of hierarchical SSZ-13 for the selective catalytic reduction reaction

2021 ◽  
pp. 120867
Author(s):  
Zhiqiang Chen ◽  
Tianle Ye ◽  
Hongxia Qu ◽  
Tenglong Zhu ◽  
Qin Zhong
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Reduction Reaction ◽  
Hydrothermal Stability ◽  
Selective Catalytic Reduction Reaction

Modeling and Simulation of Selective Catalytic Reduction for Flue Gas Denitration in Power Plants

2011 ◽  
Vol 383-390 ◽  
pp. 6580-6586
Author(s):  
Bo Xiong Shen ◽  
Ning Zhao ◽  
Ting Liu ◽  
Feng Peng Wu ◽  
Chen Zuo
Keyword(s):  
Selective Catalytic Reduction ◽  
Power Plants ◽  
Ammonia Oxidation ◽  
Catalytic Reduction ◽  
Kinetic Mechanism ◽  
Reduction Reaction ◽  
Catalyst Structure ◽  
Scr Catalyst ◽  
Selective Catalytic Reduction Reaction ◽  
Catalyst Type

Based on Eley-Rideal kinetic mechanism, one dimensional mathematical model for selective catalytic reduction reaction was established, in order to simulate the SCR process in the catalyst channel. The thermal effect on the reaction and the side effect of ammonia oxidation in the channel were considered simultaneously in the modeling. The model was testified to be reliable by compared with the experimental data. By the model, the concentration and temperature distributions in the channel were simulated. The effects of catalyst structure parameters, such as the pitch, the shape of catalyst channel and the monolithic catalyst type, on de-NOX efficiency were studied emphatically. The simulation results would be as an important reference for the design of SCR catalyst in the practical application.

Understanding Zn Functions on Hydrothermal Stability in a One-Pot-Synthesized Cu&Zn-SSZ-13 Catalyst for NH3 Selective Catalytic Reduction

ACS Catalysis ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 6197-6212 ◽  
Author(s):  
Ruinian Xu ◽  
Ziyang Wang ◽  
Ning Liu ◽  
Chengna Dai ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Hydrothermal Stability ◽  
One Pot

scholarly journals Low-Temperature Selective Catalytic Reduction of NOx on MnO2 Octahedral Molecular Sieves (OMS-2) Doped with Co

Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 396 ◽  
Author(s):  
Laichao Li ◽  
Yusi Wang ◽  
Li Zhang ◽  
Yuxi Yu ◽  
Hanbing He
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Molecular Sieves ◽  
Catalytic Reduction ◽  
Selective Reduction ◽  
Reduction Reaction ◽  
Sulfur Resistance ◽  
No Conversion ◽  
Reduction Of Nox ◽  
Doping Ratio

To improve NO conversion and sulfur resistance of low-temperature NO-CO selective catalytic reduction (SCR), it is urgent to seek new catalyst materials. Herein, using the pre-doping method, Cox-OMS-2 with different ratios of cobalt (Co) was obtained during hydrothermal synthesis of OMS-2 molecular sieves (where x represents the doping ratio of Co, i.e., x = 0.1, 0.2, 0.3, 0.4). Co was found to very efficiently intercalate into the crystal structure of OMS-2. Co and Mn work together to promote the selective reduction reaction of NOx;; the NO conversion of Co0.3-OMS-2 was the highest among all samples. Specifically, NO conversion at 50 °C increased from 72% for undoped OMS-2 to 90% for Co0.3-OMS-2. Moreover, due to the incorporation of Co, the latter also showed better sulfur resistance.

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