In recent years, people have paid more and more attention to environmental protection, and environmental protection standards have become increasingly stringent. The application of denitrification technology in coal-fired boilers is an effective way to reduce nitrogen oxides, and it has also received great attention. There are two main types of denitrification technology: SNCR (selective non-catalytic reduction technology) and SCR (selective catalytic reduction technology). This article focuses on the comparison and current status analysis of the denitrification principles, reductants, and catalysts of SNCR and SCR, and points out the current problems, in order to provide a reference for the future development of SNCR and SCR denitrification technology.
1. Anichkov, S. N. , Zykov, A. M., Tumanovskii, A. G. ,& Zaporozhskii, K. I. (2021). The development of SNCR technology and its application prospects. Thermal Engineering. 68, 510–515. doi: https://doi.org/10.1134/S004060152106001X
https://doi.org/10.1134/S004060152106001X
2. Chunlin, Z., Hailong, L., Xin, C., Yanxia, Wu, Jie, T. & Liming, Hu. (2018). Preparation of monolithic V2O5-MoO3-CeOX/TiO2/cordierite SCR denitrification catalyst. Rare Metal Materials and Engineering, S1, 222-225. doi: https://doi.org/CNKI:SUN:COSE.0.2018-S1-049
3. Chunhui, S., Yongsheng, C., Wei, L., Yan, Xu, Jingcheng, Z., & Ruixiang,Yu. (2021). Study on the new preparation process and performance of V2O5/(TiO2-SiO2) denitrification catalyst. Inorganic Salt Industry, 12, 146-149. doi: https://doi.org/10.19964/j.issn.1006-4990.2021-0191
4. Jundong X., & Jie, Wu. (2019). Combined application of low nitrogen combustion and SCR technology in flue gas denitrification of coal-fired boilers. Science and Technology Information, 13, 66-68. doi: https://doi.org/10.16661/j.cnki.1672-3791.2019.13.066
5. Haijie, C. (2016). Application of Selective Non-Catalytic Reduction (SNCR) High-Efficiency Denitrification Technology in 650MW W-Type Flame Furnace. Science and Technology and Innovation, 24, 20-22. doi: https://doi.org/10.15913/j.cnki.kjycx.2016.24.020
6. Hui, Li (2016). Analysis of SNCR flue gas denitrification reductant selection. Sulfur Phosphorus Design and Powder Engineering, 3, 4-8. doi: https://doi.org/10.16341/j.cnki.spbmh.000146
7. Hui, C., Jinyang, F., & Yi, Y. (2016). Application of combined denitrification technology in denitrification transformation of coal-fired boilers. Gansu Science and Technology, 3, 32-33. doi: https://doi.org/CNKI:SUN:GSKJ.0.2016-03-014
8. Hongjun, M., Shangshang, W., Kaiqi, Z., Jiang, Yin & Lifeng, Li. (2021). Improved SNCR flue gas denitrification device. Automation and Instrumentation, 7, 72-76. doi: https://doi.org/10.19557/j.cnki.1001-9944.2021.07.014
9. Haiyan, L., Dong, Li, Xue, M., Yuanyuan, Z., Xiaofeng, L., Ying, Lv, & Junhua, Li (2020). Effect of preparation method of CuO-WO3/TiO2 catalyst on NH3-SCR denitrification performance. Environmental Engineering, 5, 89-95. doi: https://doi.org/10.13205/j.hjgc.202005016
10. Li, H., Hu, W., Yuhao, Z., Pei, H., & Zhengfeng, C. (2020). Study on the anti-Na poisoning performance of Nb modified V-Mo/Ti denitrification catalyst. Rare Metals and Cemented Carbides, 5, 34-37. doi: https://doi.org/CNKI:SUN:XYJY.0.2020-05-007
11. Li, H., Yuhao, Z., Hu, W., Zhengfeng, C., Pei, H., & Xin, Z. (2020). Effect of adding silica sol on the performance of flat plate denitration catalyst. Industrial Catalysis, 1, 40-44. doi: https://doi.org/CNKI:SUN:GYCH.0.2020-01-008
https://doi.org/10.1016/j.jcat.2019.12.001
12. Li, H., Yang, L., Yuhao, Z., Hu, W., Zhengfeng, C., Jinke, Li, & Pei, H. (2021). Study on the Effect of Fe2O3 in Flue Gas on the Performance of Commercial V-Mo/Ti Denitrification Catalyst. Chemical Reagents, 11, 1486-1491. doi: https://doi.org/10.13822/j.cnki.hxsj.2021008247
13. Li, H., Hu, W., Yuhao, Z., Zhengfeng, C., Yang, L., Jinke, Li, & Pei, H. (2021). Study on the poisoning effect of Cr on industrial V-Mo/Ti denitrification catalyst. Inorganic Salt Industry, 8, 112-116. doi: https://doi.org/10.19964/j.issn.1006-4990.2020-0543
14. Ling, Y. (2015). Causes and control of local overheating of superheater in 600WM supercritical unit. Science and Technology and Innovation, 3, 123-128. doi: https://doi.org/10.15913/j.cnki.kjycx.2015.03.123
15. Mengmeng, Z., Mengyin, C., Pengju, Z., Hui, Z., Fushun, T. & Le, R. (2019). Catalytic effect of Ni component on supported V2O5-WO3/NiO-TiO2 denitration catalyst. Powder Metallurgy Industry, 1, 42-49. doi: https://doi.org/10.13228/j.boyuan.issn1006-6543.20170097
16. Ming, K. (2018). Study on the synergistic deactivation mechanism of mercury, arsenic and potassium in coal-fired flue gas on V2O5-WO3/TiO2 denitrification catalyst (PhD dissertation). Chongqing University. Retrieved from https://kns.cnki.net/KCMS/detail/detail.aspx?dbname=CDFDLAST2019&filenam...
17. Ruijing, Z. (2024). Application and research of SNCR denitrification technology for 300MW circulating fluidized bed boiler. Mold Manufacturing, 9, 171-173. doi: https://doi.org/10.13596/j.cnki.44-1542/th.2024.09.056
18. Yingli, Ma, Fengyu, G.., Guangru, J., Shiping, H., Shunzheng, Z., Honghong, Yi, & Xiaolong, T. (2019). A review of the development, application and molding process of SCR denitrification catalyst. Modern Chemical Industry, 8, 33-37. doi: https://doi.org/10.16606/j.cnki.issn0253-4320.2019.08.007.
19. Yuhao, Z., Li, H., Zhengfeng, C., Hu, W., Jun, Z., & Jinke, Li. (2020). Effect of Zn on the performance of industrial V-Mo/Ti denitrification catalyst. Iron and Steel Vanadium Titanium, 6, 30-34. doi: https://doi.org/CNKI:SUN:GTFT.0.2020-06-008
20. Yuhao, Z., Zhengfeng, C., Li, H., Hu, W., Yang, L., Jinke, Li, & Dongping, Z. (2021). Effect of Sn addition on denitrification and mercury oxidation performance of V-Mo/Ti catalyst. Modern Chemical Industry, 8, 159-164. doi: https://doi.org/10.16606/j.cnki.issn0253-4320.2021.08.032
21. Yupeng, L., Qian, W., Licheng, Wu, & Hanghang, Li (2021). Preparation and performance study of Br-doped V2O5/TiO2 denitration catalyst. Yunnan Chemical Industry, 6, 16-18. doi: https://doi.org/CNKI:SUN:YNHG.0.2021-06-006