片状HZSM-5负载不同粒径Co_(3)O_(4)催化剂用于丙烷催化燃烧  

Plate-Like HZSM-5 Supported Co_(3)O_(4) with Tunable Particle Size for Catalytic Combustion of Propane

作　　者：佘晓蝶 汪大闪 张瑞权 邓威 SHE Xiaodie;WANG Dashan;ZHANG Ruiquan;DENG Wei(School of Optoelectronic Materials and Technology,Jianghan University,Wuhan 430056,China;Xurihua Environmental Protection Technology,Wuhan 430030,China)

机构地区：[1]江汉大学光电材料与技术学院,湖北武汉430056 [2]武汉旭日华环保科技股份有限公司,湖北武汉430030

出　　处：《化学与生物工程》2024年第11期51-58,共8页Chemistry & Bioengineering

基　　金：江汉大学启动基金项目(1033/06010001);武汉市重点研发计划项目(2023020402010622)。

摘　　要：通过调节溶剂组成制备了不同粒径的Co_(3)O_(4)纳米颗粒,再利用简单的浸渍法制备了片状HZSM-5负载不同粒径Co_(3)O_(4)催化剂(Co_(3)O_(4)/PZ5),采用多种表征手段深入研究其物理化学性质,并探究其对丙烷催化燃烧的催化性能。结果表明,Co_(3)O_(4)纳米颗粒的粒径对Co_(3)O_(4)/PZ5催化剂的性能有显著影响,其中S-Co_(3)O_(4)/PZ5催化剂表现出最高的催化活性,其在250℃下的反应速率为1.68μmol·min^(-1)·m^(-2),其优异的催化活性归因于Co_(3)O_(4)中Co^(3+)的可还原性、表面较高的Co^(3+)含量以及钴氧化物晶格氧的快速迁移;S-Co_(3)O_(4)/PZ5催化剂在300℃下具有较高的催化稳定性;此外,水蒸气和1,2-二氯乙烷(DCE)的引入均会导致丙烷转化率下降,但水蒸气引起的下降是可逆的,而DCE引起的则是不可逆的。We prepared Co_(3)O_(4)nanoparticles with different particle sizes by adjusting solvent composition,and then prepared plate-like HZSM-5 supported Co_(3)O_(4)(Co_(3)O_(4)/PZ5)catalysts with different particle sizes by a simple impregnation method.Moreover,we further studied the physical and chemical properties of Co_(3)O_(4)/PZ5 catalysts by several characterization methods,and investigated the catalytic performance for catalytic combustion of propane.The results show that the particle size of Co_(3)O_(4)nanoparticles has a significant effect on the performance of Co_(3)O_(4)/PZ5 catalyst,among which S-Co_(3)O_(4)/PZ5 catalyst shows the highest catalytic activity,and its reaction rate is 1.68μmol·min^(-1)·m^(-2)at 250℃.The excellent catalytic activity is attributed to the reducibility of Co^(3+)in Co_(3)O_(4),the high content of Co^(3+)on the surface,and the rapid migration of cobalt oxide lattice oxygen.S-Co_(3)O_(4)/PZ5 catalyst has remarkable catalytic stability at 300℃.In addition,the introduction of water vapor and 1,2-dichloroethane(DCE)can both lead to a decrease in propane conversion;however,the decrease caused by water vapor is reversible,while the decrease caused by DCE is irreversible.

关 键 词：片状HZSM-5 催化剂 粒径调控 丙烷催化燃烧 

分 类 号：TQ211[化学工程—有机化工] TQ426.6