Hydrothermal Stability Enhancement of Al-Rich Cu-SSZ-13 for NH3 Selective Catalytic Reduction Reaction by Ion Exchange with Cerium and Samarium

2020 ◽  
Vol 59 (14) ◽  
pp. 6416-6423 ◽  
Author(s):  
Yingjie Wang ◽  
Xiaoyan Shi ◽  
Yulong Shan ◽  
Jinpeng Du ◽  
Kuo Liu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Reduction Reaction ◽  
Hydrothermal Stability ◽  
Selective Catalytic Reduction Reaction ◽  
Stability Enhancement

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 Adsorption as alternative process in the preliminary production of automotive additive

2020 ◽  
Vol 26 (3) ◽  
pp. 215-226
Author(s):  
Luana Baia ◽  
de Raddi ◽  
Carlos Pereira ◽  
de Carvalho ◽  
de Gaya
Keyword(s):  
Ion Exchange ◽  
Combustion Chamber ◽  
Selective Catalytic Reduction ◽  
Exchange Resin ◽  
Catalytic Reduction ◽  
Ion Exchange Resin ◽  
Low Energy ◽  
Diesel Fraction ◽  
Urea Solution ◽  
Oxidation Reactions

Nitrogenous contaminants in the diesel fraction are converted to NOx compounds in an automotive combustion chamber. Afterwards, they are reduced to nitrogen by catalytic reduction/oxidation reactions in presence of ammonia derived from a 32.5 wt.% urea solution. This process is named selective catalytic reduction (SCR). In Brazil, the urea solution for SCR is ARLA 32 and must comply with the limit content of 0.3 wt.% of biuret. However, the commercial Brazilian urea solution has an average biuret content of 0.5 wt.%. Thus, it is necessary to adjust the biuret content in urea solution to be used as ARLA 32, and adsorption is a low energy option. The objective of this study was to evaluate commercial adsorbents for removing biuret from solution of commercial urea to adjust it to the specification of ARLA 32. Two activated coals and one ion exchange resin were tested in adsorption assays, with best performances of both coals.

Sign in / Sign up

Export Citation Format

Share Document