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过程工程学报 ›› 2024, Vol. 24 ›› Issue (3): 284-296.DOI: 10.12034/j.issn.1009-606X.223136

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富氧条件下CO选择还原NO反应催化剂研究进展

刘雅琦1， 刘研1， 吴珂2*， 邢立文2， 连殿兴1， 陈莫浩阳1， 纪建军3， 纪永军1*   

  1. 1. 北京工商大学轻工科学技术学院，北京 100048 2. 北京工商大学化学与材料工程学院，北京 100048 3. 广盛原中医药有限公司，山西 大同 037000
  • 收稿日期:2023-05-04 修回日期:2023-07-14 出版日期:2024-03-28 发布日期:2024-03-27
  • 通讯作者: 纪永军 jiyongjun1981@126.com
  • 基金资助:
    国家自然科学基金面上项目;北京市教育委员会科研计划项目;北京工商大学人才引进项目;北京工商大学青年教师科研启动基金;北京工商大学青年教师科研启动基金;北京工商大学校级杰青培育计划项目

Recent progress of heterogeneous catalysts towards selective catalytic reduction of NO by CO under oxygen-rich conditions

Yaqi LIU1,  Yan LIU1,  Ke WU2*,  Liwen XING2,  Dianxing LIAN1,  Mohaoyang CHEN1, Jianjun JI3,  Yongjun JI1*   

  1. 1. School of Light Industry, Beijing Technology and Business University, Beijing 100048, China 2. College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China 3. Guangshengyuan Traditional Chinese Medicine Co., Ltd., Datong, Shanxi 037000, China
  • Received:2023-05-04 Revised:2023-07-14 Online:2024-03-28 Published:2024-03-27
  • Contact: JI Yong-jun jiyongjun1981@126.com

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摘要： 氮氧化物(NOx)作为大气污染物之一，是导致酸雨、光化学烟雾的重要前体物，对农业生产和人类健康造成严重威胁。CO选择催化还原NO (CO-SCR)是一种很具有前景的脱硝技术，可以同时实现NO和CO两种有害气体的有效脱除，因而成为治理烟气的最理想方案之一。为了实现工业应用，CO-SCR脱硝技术应具有较低的反应温度(150~250℃)和较好的抗氧气中毒能力，因而开发富氧条件下CO还原NO反应催化剂是环境治理方面的迫切需求。本工作综述了CO-SCR催化剂在富氧条件下的研究现状及最新的研究成果，重点介绍了Pd基、Ir基、Mn基及Co基催化剂的研究进展，对活性组分、助剂、载体的选择分别进行了较为详细的阐述。分析了催化剂的制备方法、掺杂改性、反应条件等因素对CO-SCR催化剂性能的影响。讨论了O2, H2O, SO2对催化剂性能的影响，并总结了O2抑制CO-SCR反应活性的作用机制。最后，针对富氧条件下CO还原NO的难点和未来发展方向进行总结并给出建议。

关键词: CO催化还原NO, 抗氧能力, 催化机制, 多相催化

Abstract: Nitrogen oxides (NOx), as one of the predominant atmospheric pollutants mainly derived from automobile exhaust and industrial waste gas, have played the role of an inevitable precursor that led to acid rain, photochemical smog, and other environmental contamination issues. In addition to atmospheric pollution, the growing emissions of NOx pollutants also give rise to a serious threat to agricultural production and human health. Thus, it is of urgent need to develop feasible NOx abatement strategies. Selective catalytic reduction of NO by CO (CO-SCR) is a very promising denitrification technology that can simultaneously remove harmful gases of NO and CO, making it one of the most ideal solutions for flue gas treatment. To promote its industrial applications, CO-SCR should have a low operating temperature ranging from 150℃ to 250℃ and superior resistance to oxygen poison. Therefore, there is an urgent need to develop efficient CO-SCR catalysts used under oxygen-rich conditions for abating severe environmental pollution problems. This work provides a comprehensive review of the research progress and latest research findings of CO-SCR under oxygen-containing conditions. The research advances of Pd, Ir, Rh, Mn, and Co-based heterogeneous catalysts were introduced, and the effects of active components, promoters, and supports on the catalytic performance of CO-SCR are described in detail. In this section, the preparation method, doping modification, and reaction conditions are analyzed. Meanwhile, the impact of O2, H2O, and SO2 on the catalytic activity of CO-SCR is discussed, in which the inhibition mechanism of O2 is summarized. Finally, the challenges and future developments of CO-SCR under oxygen-rich conditions are summarized and the corresponding coping solutions are proposed. We hope this review can provide an in-depth understanding and useful guidance for the rational design of efficient heterogeneous catalysts for the CO-SCR reaction in practical applications.

Key words: CO catalytic reduction of NO, O2 resistance, Catalytic mechanism, Heterogeneous catalysis