摘要
为增强LaCoO_(3)钙钛矿型催化剂对柴油机尾气中NO和碳烟颗粒物(PM)的催化活性,分别以溶胶-凝胶法和以木粉为模板的生物模板法制备了La_(0.9)K_(0.1)Co_(0.95)Ni_(0.05)O_(3)钙钛矿型催化剂,采用XRD、FT-IR、SEM和N_(2)吸附/解吸测试技术对所制备的催化剂进行理化性质表征,并通过模拟试验方法评价所制备催化剂样品对NO和PM的净化性能。表征结果表明,2种方法所制备的催化剂样品均为钙钛矿结构,且纯度具较高;生物模板法制备的木质结构La_(0.9)K_(0.1)Co_(0.95)Ni_(0.05)O_(3)钙钛矿型催化剂样品比表面积为7.22 m^(2)/g,溶胶-凝胶法所制备的粉末状催化剂样品比表面积为6.26 m^(2)/g。木质La_(0.9)K_(0.1)Co_(0.95)Ni_(0.05)O_(3)钙钛矿型催化剂样品成功复制了木粉从宏观到管胞的结构特征,形成了多孔结构。模拟结果表明,木质La_(0.9)K_(0.1)Co_(0.95)Ni_(0.05)O_(3)钙钛矿型催化剂表现出比粉末状La_(0.9)K_(0.1)Co_(0.95)Ni_(0.05)O_(3)钙钛矿型催化剂更好的催化活性,模拟尾气温度为400℃时,木质La_(0.9)K_(0.1)Co_(0.95)Ni_(0.05)O_(3)钙钛矿型催化剂对NO和PM的净化效率最高可达78%和90%,这可归因于多孔结构催化剂增加了颗粒物与催化剂的接触面积和接触点数量。
In order to enhance the catalytic activity of LaCoO_(3)perovskite-type catalysts for NO and PM emitted from diesel engine.La_(0.9)K_(0.1)Co_(0.95)Ni_(0.05)O_(3)perovskite-type catalyst samples were prepared by sol-gel method and biological template method taking wood powder as template,respectively.The physical and chemical properties of the catalyst samples were characterized by XRD,FT-IR,SEM and N_(2)adsorption/desorption testing technology.The purification performance of catalyst samples for NO and PM were conducted by simulation test.The results show that the catalyst samples prepared by the both methods exhibit obvious perovskite structure and high purity.The specific surface area of catalyst sample prepared by biological template method is 7.22 m^(2)/g,the specific surface area of catalyst sample prepared by by sol-gel method is 6.26 m^(2)/g.Woody La0.9 K0.1 Co0.95 Ni0.05 O3 perovskite-type catalyst sample prepared by biological template method can successfully replicate the structural characteristics of wood powder from macroscopic to tracheid,forming a porous structure.The simulation test results show that woody La0.9 K0.1 Co0.95 Ni0.05 O3 perovskite-type catalyst shows better catalytic activity than powdery La_(0.9)K_(0.1)Co_(0.95)Ni_(0.05)O_(3)perovskite-type catalyst samples.When the simulated exhaust temperature is 400℃,the highest purification efficiency catalysts for NO and PM can reach 78%and 90%,which can be attributed to the fact that porous catalyst increased the contact area and number of contact points between particles and catalyst.
作者
王迎辉
郭秀荣
卢振生
白曦龙
程淼
WANG Yinghui;GUO Xiurong;LU Zhensheng;BAI Xilong;CHENG Miao(School of Electrical Engineering,Sui Hua University,Suihua 152061,China;College of Mechanical and Electrical Engineering,Northeast Forestry University,Harbin 150040,China)
出处
《洁净煤技术》
CAS
CSCD
北大核心
2024年第S02期475-481,共7页
Clean Coal Technology
基金
国家自然科学基金资助项目(52271128)
黑龙江省自然科学基金项目联合引导资助项目(LH2022E118)
黑龙江省属高校基本科研业务费资助项目(YWF10236230203,YWF1023220245)
关键词
柴油机尾气
钙钛矿
生物模板法
模拟试验
催化活性
diesel engine exhaust
perovskite
biological template method
simulation test
catalytic activity
作者简介
王迎辉(1992—),男,黑龙江绥化人,博士研究生。E-mail:sjidan@163.com;通讯作者:郭秀荣(1972—),女,黑龙江哈尔滨人,教授,博士。E-mail:gxiurong2014@163.com
