deactivation mechanism
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Fuel ◽  
2022 ◽  
Vol 312 ◽  
pp. 122924
Author(s):  
Yingkai Li ◽  
Nishu ◽  
Dominic Yellezuome ◽  
Chong Li ◽  
Ronghou Liu

Author(s):  
Yani Zhang ◽  
Hongchang Zhu ◽  
Tao Zhang ◽  
Jie Li ◽  
Jianjun Chen ◽  
...  

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2641
Author(s):  
Chenxi Li ◽  
Jin Cheng ◽  
Qing Ye ◽  
Fanwei Meng ◽  
Xinpeng Wang ◽  
...  

As a heavy metal, Pb is one component in coal-fired flue gas and is widely considered to have a strong negative effect on catalyst activity in the selective catalytic reduction of NOx by NH3 (NH3-SCR). In this paper, we investigated the deactivation mechanism of the Mo-Ce/Zr-PILC catalyst induced by Pb in detail. We found that NO conversion over the 3Mo4Ce/Zr-PILC catalyst decreased greatly after the addition of Pb. The more severe deactivation induced by Pb was attributed to low surface area, lower amounts of chemisorbed oxygen species and surface Ce3+, and lower redox ability and surface acidity (especially a low number of Brønsted acid sites). Furthermore, the addition of Pb inhibited the formation of highly active intermediate nitrate species generated on the surface of the catalyst, hence decreasing the NH3-SCR activity.


Fuel ◽  
2021 ◽  
Vol 301 ◽  
pp. 121064
Author(s):  
Meng Ma ◽  
Jiaofei Wang ◽  
Yonghui Bai ◽  
Peng Lv ◽  
Xudong Song ◽  
...  

Author(s):  
D. I. Ezzhelenko ◽  
S. A. Nikolaev ◽  
A. V. Chistyakov ◽  
P. A. Chistyakova ◽  
M. V. Tsodikov

2021 ◽  
Vol 611 ◽  
pp. 117976
Author(s):  
Aurélien Bonnin ◽  
Yannick Pouilloux ◽  
Vincent Coupard ◽  
Denis Uzio ◽  
Ludovic Pinard

2021 ◽  
Vol 164 ◽  
pp. 824-832
Author(s):  
Bingxin Zhang ◽  
Ming Gao ◽  
Jiayu Geng ◽  
Yuwei Cheng ◽  
Xiaona Wang ◽  
...  

2021 ◽  
Vol 125 (4) ◽  
pp. 2485-2491
Author(s):  
Jianzhou Wu ◽  
Kaimin Du ◽  
Jianwei Che ◽  
Shihui Zou ◽  
Liping Xiao ◽  
...  

2021 ◽  
Vol 23 (14) ◽  
pp. 8916-8925
Author(s):  
Leila Shahrokh ◽  
Reza Omidyan ◽  
Gholamhassan Azimi

Excited-state deactivation mechanism of protonated cytosine and thymine is investigated based on ab initio and NAMD simulation methods. The ring deformation from C6 region is suggested to play the most prominent role in deactivation mechanism.


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