摘要
运用旋蒸法制备系列Cu ZSM-5催化剂,测试比较以不同前驱体和不同的铜负载量、离子交换时间制备的催化剂的SCR性能。实验结果表明,以硝酸铜为前驱体、铜负载量为3%、离子交换时间为24 h制备的催化剂具有相对最佳的SCR性能,在225~425℃的温度区间内,NOx转化率在90%以上。不同交换时间制备的催化剂对ZSM-5分子筛内部结构的影响不明显。在离子交换时间为24 h条件下制备的催化剂,具有相对更为优异的氧化还原性能。
A series of Cu/ZSM-5 catalysts are prepared by rotary evaporation method. The SCR properties of catalysts prepared with different precursors and different Cu loadings and ion exchange times are compared. The experimental results show that the catalyst prepared with copper nitrate as precursor,Cu loading of 3% and ion exchange time of 24 h has relatively best SCR performance. The NOx conversion rate is above 90% in the temperature range of 225-425 °C. The catalyst prepared at different exchange times had no obvious effect on the internal structure of ZSM-5 zeolite. The catalyst prepared under the ion exchange time of 24 h has relatively superior redox performance.
作者
刘世成
秦瑞香
肖瑞
张春雪
王单
刘通
王金波
LIU Shicheng;QIN Ruixiang;XIAO Rui;ZHANG Chunxue;WANG Dan;LIU Tong;WANG Jinbo(College of Chemistry and Chemical Engineering,Chongqing University of Science and Technology,Chongqing 401331,China)
出处
《重庆科技学院学报（自然科学版）》
CAS
2019年第5期108-111,共4页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
重庆市科委项目“汽车尾气四元高效催化转化技术研究与应用”(cstc2018jscx-msyb X0057)，“面向汽车国六高性能催化器生产的智能制车间应用示范”(cstc2018jszx-cyzd X0186)
重庆市生活垃圾资源化处理协同创新中心项目“微波耦合分子筛负载纳米金属氧化物催化烟气脱硝工艺技术研究”(Shljzyh2007-008)
