化工进展 ›› 2019, Vol. 38 ›› Issue (06): 2746-2755.DOI: 10.16085/j.issn.1000-6613.2018-1749

• 工业催化 • 上一篇    下一篇

Ir基催化剂用于CO选择性催化还原NO的研究进展

孟婧轩1(),高凤雨1,2,唐晓龙1,2(),易红宏1,2,周远松1,2   

  1. 1. 北京科技大学能源与环境工程学院,北京 100083
    2. 工业典型污染物资源化处理北京市重点实验室,北京 100083
  • 收稿日期:2018-08-31 出版日期:2019-06-05 发布日期:2019-06-05
  • 通讯作者: 唐晓龙
  • 作者简介:孟婧轩(1992—),女,硕士研究生,研究方向为大气污染控制。E-mail:<email>jingxuan1127@163.com</email>。
  • 基金资助:
    国家重点研发计划重点专项(2017YFC0210303);国家自然科学基金面上项目(21677010);国家自然科学基金(U1660109,21806009);中国博士后基金(2018M631344);中央高校基本科研业务费专项资金项目(FRF-TP-18-019A1)

Review of the Ir-based catalyst in selective catalytic reduction of NO with CO

Jingxuan MENG1(),Fengyu GAO1,2,Xiaolong TANG1,2(),Honghong YI1,2,Yuansong ZHOU1,2   

  1. 1. School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China
    2. Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants,Beijing 100083,China
  • Received:2018-08-31 Online:2019-06-05 Published:2019-06-05
  • Contact: Xiaolong TANG

摘要:

针对具有烟温低、氧含量高和CO浓度大等特征的固定源烟气(钢铁烧结/球团烟气和焦化烟气等)脱硝领域,CO选择性催化还原NO x (CO-SCR)技术具有良好的发展前景。Ir基贵金属催化剂因其在CO-SCR反应体系中表现出了良好的抗氧能力和较高的催化活性成为催化脱硝领域研究的热点之一。本文重点总结了单一载体、复合载体与复合活性组分三类Ir基催化剂在CO-SCR脱除NO x 中的催化性能,同时从制备条件和反应条件两大方面归纳了其对Ir基催化剂的CO-SCR脱硝性能的影响,简要阐述了Ir基催化剂表面反应机理,并对未来研究工作进行了展望,指出采用多种手段对催化剂进行改性,并通过降低Ir负载量、反应温度窗口以及提升其催化活性等方式来降低成本,为实现Ir基催化剂CO-SCR工业化应用提供借鉴。

关键词: 选择催化还原, 一氧化碳, 铱, 催化剂

Abstract:

The CO selective catalytic reduction of NO x (CO-SCR) technique has attracted considerable attentions in reduction denitration for flue gas from stationary source such as steel sintering/pellet emissions and coking flue gas, and the most outstanding characteristics of these emissions are low temperature, high oxygen content and high CO concentration. Ir-based catalysts, one class of precious metal catalysts, have become one of the hotspots in catalytic reduction denitration due to their excellent antioxidant capacity and high catalytic activity in the CO-SCR reaction system. This review was devoted to the catalytic performance of three types of Ir-based catalysts in CO-SCR removal of NO x , including single carrier, composite carrier and composite active component. The effects of the preparation conditions and reaction conditions on the CO-SCR denitration performance of the Ir-based catalysts were also summarized. Finally, the reaction mechanism of NO x on the surface of the Ir-based catalysts was briefly described. The paper points out that the catalyst can be modified by various methods, and the cost can be reduced by reducing the Ir loading and the reaction temperature window or improving the catalytic activity, which provides reference for the industrial application of the Ir-based catalyst CO-SCR.

Key words: selective catalytic reduction(SCR), carbon monoxide, iridium, catalyst

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