Fe-modified MnOx/TiO2 as the SCR catalyst for simultaneous removal of NO and mercury from coal combustion flue gas

2018 ◽  
Vol 348 ◽  
pp. 618-629 ◽  
Author(s):  
Shibo Zhang ◽  
Yongchun Zhao ◽  
Jianping Yang ◽  
Junying Zhang ◽  
Chuguang Zheng
Author(s):  
Zhiwen Xu ◽  
Yuxin Li ◽  
Yungang Wang ◽  
Hao Wang ◽  
Qinxin Zhao

Through analyzing the impact of the factors of catalyst deactivation, different factors are classified according to timeliness characteristics. In this research, experiments were made under the condition of coal combustion flue gas on a coal-fired boiler to study the characteristics of the early deactivation of the SCR catalyst. Analysis shows that the main cause of early deactivation of catalyst is chemical poisoning (mainly alkali metal) and pores clogging on the surface of the catalyst. While the main cause of long-term deactivation is deeper chemical poisoning, pores clogging and the chemical form changes of elements on the surface of the catalyst. Through analyzing the influence of the factors of catalyst deactivation, separate factors are classified according to timeliness characteristics. This research provides a strong fundamental support to clear the deactivation mechanism of the SCR catalyst.


RSC Advances ◽  
2020 ◽  
Vol 10 (42) ◽  
pp. 25325-25338 ◽  
Author(s):  
Shibo Zhang ◽  
Qingzhu Zhang ◽  
Yongchun Zhao ◽  
Jianping Yang ◽  
Yang Xu ◽  
...  

CeO2 modification improves the synergistic Hg0 removal performance of commercial SCR catalyst.


2021 ◽  
Vol 420 ◽  
pp. 129843
Author(s):  
Zifeng Luo ◽  
Ling You ◽  
Jiang Wu ◽  
Yubao Song ◽  
Siyuan Ren ◽  
...  

2014 ◽  
Vol 29 (1) ◽  
pp. 377-383 ◽  
Author(s):  
Yanran Zuo ◽  
Honghong Yi ◽  
Xiaolong Tang

Author(s):  
Junxiang Guo ◽  
Lingling Zhang ◽  
Daqiang Cang ◽  
Liying Qi ◽  
Wenbin Dai ◽  
...  

Abstract In this study, a novel swirl combustion modified device for steel slag was designed and enhanced with the objective of achieving highly efficient and clean coal combustion and also for achieving the whole elements utilization of coal. Coal ash and steel slag were melted in the combustion chamber and subsequently entered the slag chamber. The detrimental substances solidified and formed crystals, which allowed for the comprehensive utilization of the ash and slag. Our experiments mainly aimed to mitigate the formation of NOx, while using the heat and slag simultaneously during the coal combustion without a combustion efficiency penalty. The increase in the device’s energy efficiency and reduction in the NOx emissions are important requirements for industrialization. The experiments were carried out in an optimized swirling combustion device, which had a different structure and various coal feeding conditions in comparison to previously reported devices. The fuel-staged and non-staged combustion experiments were compared under different coal ratios (bitumite:anthracite). For the fuel-staged combustion experiments, the NOx concentration in the flue gas was observed to decrease significantly when the coal ratio of 1:1, an excess air coefficient of 1.2, and a fuel-staged ratio of 15:85 were used. Under these conditions, the flue gas temperature was as high as 1,620°C, while the NOx concentration was as low as 320 mg/m3 at 6 % O2. The air-surrounding-fuel structure that formed in the furnace was very beneficial in reducing the formation of NOx. In comparison to other types of coal burners, the experimental combustion device designed in this study achieved a significant reduction of NOx emissions (approximately 80 %).


2012 ◽  
Vol 35 (10) ◽  
pp. 1879-1884 ◽  
Author(s):  
Y. X. Liu ◽  
J. Zhang ◽  
Z. Wang ◽  
M. Du

2006 ◽  
Vol 40 (24) ◽  
pp. 7919-7924 ◽  
Author(s):  
Yuzhong Li ◽  
Huiling Tong ◽  
Yuqun Zhuo ◽  
Shujuan Wang ◽  
Xuchang Xu

1998 ◽  
Vol 17 (8) ◽  
pp. 523-533 ◽  
Author(s):  
James C. Hower ◽  
Uschi M. Graham ◽  
Amy S. Wong ◽  
J.David Robertson ◽  
Bethel O. Haeberlin ◽  
...  

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