Effect of CO-pretreatment on the CuO–V2O5/γ-Al2O3 catalyst for NO reduction by CO

2014 ◽  
Vol 4 (12) ◽  
pp. 4416-4425 ◽  
Author(s):  
Yan Xiong ◽  
Xiaojiang Yao ◽  
Changjin Tang ◽  
Lei Zhang ◽  
Yuan Cao ◽  
...  
Keyword(s):  
No Reduction ◽  
Reduction Of No ◽  
No Reduction By Co ◽  
Al2o3 Catalyst

The influence of CO-pretreatment on the properties of CuO–V2O5/γ-Al2O3 catalysts was investigated in the reduction of NO by CO.

scholarly journals The influence of support composition on the activity of Cu:Ce catalysts for selective catalytic reduction of NO by CO in the presence of excess oxygen

2020 ◽  
Vol 44 (3) ◽  
pp. 709-718 ◽  
Author(s):  
Zahra Gholami ◽  
Guohua Luo ◽  
Fatemeh Gholami
Keyword(s):  
Selective Catalytic Reduction ◽  
No Reduction ◽  
Catalytic Reduction ◽  
Catalytic Performance ◽  
Excess Oxygen ◽  
Reduction Of No ◽  
No Reduction By Co ◽  
Excellent Catalytic Performance

Excellent catalytic performance for NO reduction by CO in the presence of 5% O2 over Cu1:Ce3/Al2O3.

scholarly journals Studies on H2-Assisted Liquefied Petroleum Gas Reduction of NO over Ag/Al2O3 Catalyst

2018 ◽  
Vol 13 (2) ◽  
pp. 227 ◽  
Author(s):  
Pratichi Singh ◽  
Deepak Yadav ◽  
Pooja Thakur ◽  
Jitendra Pandey ◽  
Ram Prasad
Keyword(s):  
Low Temperature ◽  
No Reduction ◽  
Flow Reactor ◽  
Catalytic Reduction ◽  
Fixed Bed ◽  
Liquefied Petroleum Gas ◽  
Lean Burn ◽  
Reduction Of No ◽  
Al2o3 Catalyst ◽  
Scr Of Nox

Hydrocarbon-Selective catalytic reduction (HC-SCR) is one of the potential methods to remove NOx emissions from diesel engine, lean burn petrol engines and natural gas engines exhaust. Ag/Al2O3 is a good catalyst for HC-SCR of NOx under lean-burn conditions. Further, addition of small amount of H2 is effective for enhancing HC-SCR activity. This effect is unique to silver and to specific Ag/support combinations, namely, Ag/γ-Al2O3. Various HC reductants, such as: octane, decane, dodecane and propane, have been reported in the literatures. Only a single study on LPG as a reductant over Cu-ZSM catalyst was reported. There was no work reported on H2 assisted LPG over Ag/Al2O3 catalyst. Thus, this gap in the literature is filled with the present investigation of NO reduction over 2 wt.% Ag/Al2O3 catalyst using LPG reductant. The fresh and used catalyst was characterized by various techniques like low temperature N2-adsorption, XRD, XPS and SEM. There was practically no change in the characteristics of the fresh and used catalyst. Two different reductants of CO and LPG were compared for SCR of NO over the catalyst without and with H2-assisted. The experiments were performed in a fixed bed tubular flow reactor under the following conditions: 100mg catalyst; 0.13% NO, 2.5% LPG/CO, 1% H2, 10% O2, rest Ar; total flow rate 60 mL/min; temperature ambient 400 oC and pressure 1 atm. Around 100% conversion of NO was achieved using LPG reductant. Light off temperature of NO reduction significantly reduced by H2assisted LPG reductant. The maximum conversion of NO with CO was limited to 35.15% at temperature of 224 oC and above. Whereas, 97.79 % NO conversion was achieved at 365 oC with LPG reductant. While, the maximum conversions with H2-LPG and H2-CO reductants were 100 and 99.46% at 117 and 220 oC, respectively. Therefore, H2-LPG-SCR of NOx over 2 wt.% Ag/Al2O3 catalyst system can be used to get 100% reduction at low temperature. Copyright © 2018 BCREC Group. All rights reservedReceived: 24th June 2017; Revised: 6th October 2017; Accepted: 10th November 2017; Available online: 11st June 2018; Published regularly: 1st August 2018How to Cite: Singh, P., Yadav, D., Thakur, P., Pandey, J., Prasad, R. (2018). Studies on H2-Assisted Liquefied Petroleum Gas Reduction of NO over Ag/Al2O3 Catalyst. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2): 227-235 (doi:10.9767/bcrec.13.2.1307.227-235) 

A first-principles understanding of the CO-assisted NO reduction on the IrRu/Al2O3 catalyst under O2-rich conditions

2021 ◽  
Author(s):  
Malik Waqar Arshad ◽  
Dong Hun Kim ◽  
Young-Woo You ◽  
Soo Min Kim ◽  
Iljeong Heo ◽  
...  
Keyword(s):  
First Principles ◽  
No Reduction ◽  
Surface Alloy ◽  
No Reduction By Co ◽  
Ensemble Effect ◽  
Bulk Structure ◽  
Al2o3 Catalyst

The IrRu alloy offered optimal energetics for NO reduction by CO. The ensemble effect plays a key role in promoting the reactivity of the IrRu alloy. Making the IrRu surface alloy is better for CO-SCR than forming an alloy over the bulk structure.

A novel integrated rotary reactor for NO reduction by CO and air preheating: Reactor design and heat transfer modelling

2021 ◽  
Vol 190 ◽  
pp. 116815
Author(s):  
Jianjie Li ◽  
Peiliang Sun ◽  
Xingxing Cheng ◽  
Xiangdong Li ◽  
Xiaotao T. Bi ◽  
...  
Keyword(s):  
Heat Transfer ◽  
No Reduction ◽  
Reactor Design ◽  
No Reduction By Co ◽  
Transfer Modelling ◽  
Rotary Reactor

NH3 formation pathways from NO reduction by CO in the presence of water over Rh/Al2O3

2021 ◽  
Vol 286 ◽  
pp. 119893
Author(s):  
Chun-Jae Yoo ◽  
Andrew (Bean) Getsoian ◽  
Aditya Bhan
Keyword(s):  
No Reduction ◽  
No Reduction By Co ◽  
Nh3 Formation

Mechanistic insight into the influence of O2 on N2O formation in the selective catalytic reduction of NO with NH3 over Pd/CeO2 catalyst

2021 ◽  
Author(s):  
Liping Sheng ◽  
Songda Li ◽  
Zhaoxia Ma ◽  
Fei Wang ◽  
Hu He ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
No Reduction ◽  
Catalytic Reduction ◽  
Temperature Dependent ◽  
N2o Formation ◽  
Reduction Of No ◽  
Mechanistic Insight ◽  
Insight Into

O2 greatly affected the pathway for NO reduction over the Pd/CeO2 catalyst and resulted in a temperature-dependent NH3-SCR performance and formation of N2O.

The mechanism of SO2 effect on NO reduction with propene over In2O3/Al2O3 catalyst

2007 ◽  
Vol 119 (1-4) ◽  
pp. 48-51 ◽  
Author(s):  
Chuankui Luo ◽  
Junhua Li ◽  
Yongqing Zhu ◽  
Jiming Hao
Keyword(s):  
No Reduction ◽  
Al2o3 Catalyst
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