摘要
为了提高LaFeO_(3)催化剂同时净化NO和碳烟性能,采用溶胶-凝胶法,以柠檬酸为络合剂制备了具有纳米结构的LaFe_(1-x)Ni_(x)O_(3)钙钛矿催化剂。通过X射线衍射(XRD)对催化剂进行表征分析,结果表明溶胶-凝胶法制备的LaFe_(1-x)Ni_(x)O_(3)催化剂形成了很好的LaFeO_(3)钙钛矿结构。利用固定床微型反应器评价催化活性,结果表明Ni掺杂能够提高LaFeO_(3)催化剂的催化性能,其中LaFe_(0.9)Ni_(0.1)O_(3)催化剂具有最佳催化活性,其碳烟起燃温度(Tig)为260℃,碳烟最大燃烧速率温度(T_(max))为420℃,NO的最大转化率(η_(max))为26.05%。表明Ni掺杂改性的LaFe_(0.9)Ni_(0.1)O_(3)催化剂具有良好的同时净化NO和碳烟性能。
To improve the performance of LaFeOcatalysts for the simultaneous removal of NO and soot,LaFeNiOperovskite catalysts with nanostructures were prepared by the sol-gel method with citric acid as complexant.The catalysts were characterized by X-ray diffraction(XRD),which shows that the LaFeNiOcatalysts own the perovskite structure.The catalytic activity was tested in a fixed-bed microreactor,which indicated that Ni doping could improve the catalytic performance of the LaFeOcatalyst.Among them,the LaFeNiOcatalyst exhibited the optimal catalytic activities,with the soot ignition temperature(T)of 260 ℃,the maximum combustion rate temperature of soot(T)of 420℃,and the maximum conversion of NO(η)reached 26.05%,indicating that the catalyst had a good catalytic performance for the simultaneous removal of NO and soot.
作者
王伟
廖华清
肖静
WANG Wei;LIAO Hua-qing;XIAO Jing(School of Automotive Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan University of Technology,Wuhan 430070,China;Hubei Research Center for New Energy&Intelligent Connected Vehicle,Wuhan University of Technology,Wuhan 430070,China;Institute of New Materials,Wuhan University of Technology,Wuhan 430070,China)
出处
《武汉理工大学学报》
CAS
2022年第6期1-5,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金(52102074)
新能源汽车科学与关键技术学科创新引智基地(B17034)
教育部创新团队发展计划(IRT_17R83)。
