Gd-modified MnOx for the selective catalytic reduction of NO by NH3: The promoting effect of Gd on the catalytic performance and sulfur resistance

2018 ◽  
Vol 348 ◽  
pp. 820-830 ◽  
Author(s):  
Zhaoyang Fan ◽  
Jian-Wen Shi ◽  
Chen Gao ◽  
Ge Gao ◽  
Baorui Wang ◽  
...  
2021 ◽  
Vol 95 ◽  
pp. 77-86
Author(s):  
Gui-lin Wu ◽  
Rui-tang Guo ◽  
Yuan-zhen Liu ◽  
Chao-peng Duan ◽  
Yu-fang Miao ◽  
...  

Clay Minerals ◽  
1997 ◽  
Vol 32 (4) ◽  
pp. 665-672 ◽  
Author(s):  
K. Bahranowski ◽  
J. Janas ◽  
T. Machej ◽  
E. M. Serwicka ◽  
L. A. Vartikian

AbstractA series of V-doped titania-pillared clay catalysts, characterized by ICP-AES chemical analysis, X-ray diffraction, BET surface area measurement, and ESR spectroscopy, have been tested in the selective catalytic reduction of NO by NH3. An ESR analysis shows that V dopant is anchored to the titania pillars. Vanadyl species with differing degrees of in-plane V-O π-covalent bonding are produced depending on the method of sample preparation. Polymeric V species appear as the V content is increased. Catalytic performance of these systems depends on the method of preparation and on the V content. The best catalyst, converting 90-100% NO in the temperature range 523-623 K, is obtained by exchange of pillared montmorillonite with vanadyl ions, at an extent of exchange below the level where significant amounts of polymeric V species appear. The co-pillared catalyst, containing vanadyl centres characterized by a higher degree of in-plane ncovalent bonding (according to ESR), is less selective than the exchanged samples.


2018 ◽  
Vol 3 (9) ◽  
pp. 2683-2691 ◽  
Author(s):  
Mengqi Yin ◽  
Wenge Qiu ◽  
Liyun Song ◽  
Hongtai Zhu ◽  
Yun Chen ◽  
...  

2010 ◽  
Vol 96 (3-4) ◽  
pp. 408-420 ◽  
Author(s):  
Fudong Liu ◽  
Hong He ◽  
Changbin Zhang ◽  
Zhaochi Feng ◽  
Lirong Zheng ◽  
...  

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