华南理工大学学报(自然科学版) ›› 2015, Vol. 43 ›› Issue (3): 143-150.doi: 10.3969/j.issn.1000-565X.2015.03.021

• 环境科学技术 • 上一篇    

分子筛应用于低温 NH3 -SCR 脱硝催化剂的研究进展

喻成龙1 黄碧纯1,2† 杨颖欣1   

  1. 1. 华南理工大学 环境与能源学院,广东 广州 510006;2. 华南理工大学 工业聚集区污染控制与生态修复教育部重点实验室,广东 广州 510006
  • 收稿日期:2014-08-05 修回日期:2014-10-08 出版日期:2015-03-25 发布日期:2015-02-10
  • 通信作者: 黄碧纯(1966-),女,教授,主要从事大气污染控制研究. E-mail:cebhuang@scut.edu.cn
  • 作者简介:喻成龙(1988-),男,博士生,主要从事空气污染物催化净化研究. E-mail: chenglongyu888@163. com
  • 基金资助:

    国家自然科学基金资助项目(20977034,51478191)

Review on Application of Molecular Sieve to Denitration Catalysts for Low-Temperature NH3 -SCR

Yu Cheng-long1 Huang Bi-chun1,2 Yang Ying-xin1   

  1. 1. School of Environment and Energy,South China University of Technology,Guangzhou 510006,Guangdong,China;2. The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education,South China University of Technology,Guangzhou 510006,Guangdong,China
  • Received:2014-08-05 Revised:2014-10-08 Online:2015-03-25 Published:2015-02-10
  • Contact: 黄碧纯(1966-),女,教授,主要从事大气污染控制研究. E-mail:cebhuang@scut.edu.cn
  • About author:喻成龙(1988-),男,博士生,主要从事空气污染物催化净化研究. E-mail: chenglongyu888@163. com
  • Supported by:
    Supported by the National Natural Science Foundation of China(NSFC)(20977034,51478191)

摘要: 低温 NH3 -SCR 技术能在低于 200℃的反应温度下将 NOx 高效转化为 N2 ,具有较好的经济效益和应用前景. 开发高活性、高抗中毒的低温 SCR 脱硝催化剂已成为当前国内外环境领域的研究热点. 硫中毒和水抑制是阻碍低温 SCR 脱硝催化剂发展和应用的关键因素. 分子筛具有优良的吸附性能、适宜的表面酸性、择形性以及灵活性,可有效地引入过渡金属元素,在低温 SCR 领域有很好的应用前景. 文中综述了近年来分子筛应用于低温 NH3 -SCR 脱硝催化剂的研究成果,重点关注 ZSM-5、SAPO-34、SBA-15、MCM-41 以及BETA 分子筛,分析了其低温选择性催化还原性能、抗硫抗水性能以及反应机理,并对计算模拟在分子筛催化剂设计中的应用进行了介绍. 最后,针对分子筛应用于低温 NH3 -SCR 所存在的问题,指出了今后研究的方向.

关键词: 选择性催化还原, 低温脱硝, 催化剂, 分子筛, 过渡金属

Abstract: Low-temperature NH3 -SCR is an efficient technology with high economic value and broad application prospect for transforming NOx into N2 below 200 ℃. Great attention has been paid worldwide to develop low-temperature SCr denitration catalysts with high activity and strong resistance to sulfur dioxide and water,which is also crucial for the development and application of low-temperature SCr technologies. Molecular sieves are of ex-cellent adsorption performance,suitable surface acidity,good shape selectivity and flexibility,as well as the capa-bility of introducing transition metal elements. This paper reviews the research progress of molecular sieves used in denitration catalysts for low-temperature NH3 -SCR,and emphasizes the low-temperature selective catalytic reduction performance,the sulfur dioxide and water resistance,as well as the reaction mechanism of ZSM-5,SAPO-34,SBA-15,MCM-41 and beta molecular sieve. Moreover,the application of calculating simulation to the design of molecular sieve catalysts is introduced,some problems existing in the application of molecular sieves to low-tempe-rature NH3-SCR are analyzed,and the future research trend is also pointed out.

Key words: selective catalytic reduction, low-temperature denitration, catalyst, molecular sieves, transition metal