化工进展 ›› 2020, Vol. 39 ›› Issue (10): 4015-4023.DOI: 10.16085/j.issn.1000-6613.2019-2122

• 工业催化 • 上一篇    下一篇

固定源废气处理的催化剂涂覆工艺研究进展

赵春林1(), 马子然1(), 王宝冬1(), 李歌1, 王红妍1, 周佳丽1, 路光杰2, 肖雨亭3, 杨建辉2, 陆金丰3   

  1. 1.北京低碳清洁能源研究院,北京 102211
    2.北京国电龙源环保工程有限公司,北京 100039
    3.江苏龙源催化剂有限公司,江苏 无锡 214123
  • 出版日期:2020-10-05 发布日期:2020-10-09
  • 通讯作者: 马子然,王宝冬
  • 作者简介:赵春林(1986—),女,博士,高级工程师,研究方向为大气污染控制。E-mail:chunlin.zhao.h@chnenergy.com.cn
  • 基金资助:
    国家能源集团科技项目“宽温运行窗口脱硝催化剂关键技术与应用研究”(CF9300190065)

Research progress of catalyst coating process for exhaust gas treatment from fixed source

Chunlin ZHAO1(), Ziran MA1(), Baodong WANG1(), Ge LI1, Hongyan WANG1, Jiali ZHOU1, Guangjie LU2, Yuting XIAO3, Jianhui YANG2, Jinfeng LU3   

  1. 1.National Institute of Clean-and-Low-Carbon Energy, Beijing 102211, China
    2.Beijing Guodian Longyuan Environmental Engineering Co. , Ltd. , Beijing 100039, China
    3.Jiangsu Longyuan Catalyst Co. , Ltd. , Wuxi 2142123, Jiangsu, China
  • Online:2020-10-05 Published:2020-10-09
  • Contact: Ziran MA,Baodong WANG

摘要:

由工业固定源排放的NOx和挥发性有机物(VOCs)是大气复合污染物的重要前体物质。整体式催化剂常被用于脱除NOx和VOCs。涂覆法是可工业化大规模生产整体式催化剂的工艺之一,具有活性组分用量少、生产成本低的优点,此工艺被广泛用于固定源废气处理的催化剂制备领域。但是由于高通量烟气的冲刷会造成表面活性组分损失和寿命降低,限制其应用,所以在设计催化剂的过程中不但需要关注催化剂涂层的高活性,还需要重点考察其耐磨损性。本文综述了国内外用于固定源废气处理整体式催化剂涂覆工艺的研究进展,主要分析了预处理方法对蜂窝陶瓷载体物理化学性质的影响;重点综述了蜂窝陶瓷负载催化剂活性组分的常规涂覆方法,分为间接涂覆法和直接涂覆法,进一步对间接涂覆法的第二载体涂层进行分类探讨,简述了直接涂覆法的浆料配方及工艺参数对涂层性能的影响,然后对两种涂覆工艺的优缺点进行论述,最后总结了整体式催化剂在固定源废气(NOx和VOCs)处理领域的相关应用。

关键词: 整体器件, 催化剂, 制备, 涂覆工艺, 氮氧化物, 挥发性有机物

Abstract:

NOx and VOCs emitted from industrial fixed sources are important precursors of atmospheric composite pollutants. Monolithic catalysts are often used to remove NOx and VOCs. The coating method is one of the large-scale production processes of monolithic catalysts. It has the advantages of less active components without generation of a large amount of catalyst waste and low production costs. This process is widely used in the preparation of catalyst for stationary source exhaust gas treatment. Because the flushing of high-throughput flue gas will cause the loss of surface active components of the catalysis and reduce its life, which limits its application in fixed source exhaust gas treatment. The preparation of monolithic catalyst by the coating process not only needs to pay attention to the high catalyst activity and the abrasion resistance of the coating. The research progress of monolithic catalyst coating processes was summarized and discussed. The influence of pretreatment methods on the physical and chemical properties of honeycomb ceramic support was mainly analyzed. The conventional coating methods for active components of honeycomb ceramic supported catalysts were summarized, which were divided into indirect coating method and direct coating method. For the indirect coating method, the second carrier coating was further classified. For the direct coating method, the effects of slurry formulation and process parameters on coating performance are briefly described. The advantages and disadvantages of the two coating processes are also discussed. Finally, the applications of monolithic catalyst in the field of fixed source exhaust gas (NOx and VOCs) treatment were introduced.

Key words: monolith, catalyst, preparation, wash-coating, nitrogen oxides (NOx), volatile organic compounds (VOCs)

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