首页|Promoted NH3-SCR activity and hydrothermal stability of Cu-SSZ-50 catalyst synthesized by one-pot method

Promoted NH3-SCR activity and hydrothermal stability of Cu-SSZ-50 catalyst synthesized by one-pot method

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Nitrogen oxide(NOx)is one of the most critical contaminants in the air,and the control of NOx emis-sion from diesel vehicles is very important.Cu-based small-pore zeolites have already been applied for NOx abatement on diesel vehicles.Among the small-pore zeolites,Cu-SSZ-50 catalysts with good NH3-SCR catalytic activity were believed to have potential for application.In this study,a one-pot synthesis method for Cu-SSZ-50 catalysts was developed for the first time,using the co-templates of Cu-TEPA and 2,6-dimethyl-N-methylpyridinium hydroxide.In this synthesis method,Cu-SSZ-50 with various Cu con-tents can be obtained by adjusting the amount of Cu-TEPA without the need for a further after-treatment process.The addition of Cu-TEPA affected the framework atoms and Cu species,and a lower Si/Al ra-tio and more SCR active Cu species were obtained.The synthesized catalyst with a Cu/Al ratio of 0.40 exhibited over 90％NOx conversion between 200 ℃ and 450 ℃ for the selective catalytic reduction of NOx with NH3(NH3-SCR).Meanwhile,over 80％NOx conversion could be obtained from 250 ℃ to 450 ℃ after hydrothermal aging at 750 ℃ for 16 h.In addition,both L-H and E-R mechanisms were proven to exist for the one-pot-synthesized Cu-SSZ-50 by in situ DRIFTS experiments.The simple synthesis proce-dure,excellent catalytic activity and hydrothermal stability brighten the prospects for the application of Cu-SSZ-50.

NH3-SCRCu-SSZ-50One-pot synthesisSi/Al ratioCu species distributionReaction mechanism

Jinpeng Du、Jingyi Wang、Yulong Shan、Shichao Han、Wenpo Shan、Hong He

展开 >

Center for Excellence in Regional Atmospheric Environment,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China

Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control,Ningbo Urban Environment Observation and Research Station,Institute of Urban Environment,Chinese Academy of Sciences,Ningbo 315800,China

University of Chinese Academy of Sciences,Beijing 100049,China

State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China

展开 >

国家自然科学基金国家自然科学基金国家自然科学基金Science and Technology Innovation"2025"major program in Ningbo

5220013652225004519786402020Z103

2024

10.1016/j.cclet.2023.108781

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(3)
  • 39