Lin Dehai, Zhang Longhui, Liu Zilin, Wang Baodong, Han Yifan
National Institute of Clean and Low Carbon Energy, Beijing, China.
College of Chemical Esngineering, Zhengzhou University, Zhengzhou, Henan, China.
Front Chem. 2022 Aug 17;10:946133. doi: 10.3389/fchem.2022.946133. eCollection 2022.
With the looming goal of carbon neutrality and increasingly stringent environmental protection policies, gas purification in coal-fired power plants is becoming more and more intense. To achieve the NOx emission standard when coal-fired power plants are operating at full load, wide-temperature denitrification catalysts that can operate for a long time in the range of 260-420°C are worthy of study. This review focuses on the research progress and deactivation mechanism of selective catalytic reduction (SCR) denitration catalysts applied to a wide temperature range. With the increasing application of SCR catalysts, it also means that a large amount of spent catalysts is generated every year due to deactivation. Therefore, it is necessary to recycle the wide temperature SCR denitration catalyst. The challenges faced by wide-temperature SCR denitration catalysts are summarized by comparing their regeneration processes. Finally, its future development is prospected.
随着碳中和目标的临近以及环境保护政策日益严格，燃煤电厂的气体净化要求越来越高。为了使燃煤电厂在满负荷运行时达到氮氧化物排放标准，能够在260-420°C范围内长时间运行的宽温脱硝催化剂值得研究。本文综述了应用于宽温度范围的选择性催化还原（SCR）脱硝催化剂的研究进展和失活机理。随着SCR催化剂应用的增加，这也意味着每年会因失活产生大量废催化剂。因此，有必要对宽温SCR脱硝催化剂进行回收利用。通过比较宽温SCR脱硝催化剂的再生过程，总结了其面临的挑战。最后，对其未来发展进行了展望。
