多级孔LaNiO_(3)制备及其在苯酚加氢脱氧反应中的催化性能  

Preparation of hierarchical pore LaNiO_(3)catalyst and its performance in hydrodeoxygenation reaction of phenol

作　　者：彭林森 李凝 吴剑[2] 蒋武 Peng Linsen;Li Ning;Wu Jian;Jiang Wu(College of Chemical Engineering,Guangdong University of Petrochemical Technology,Maoming 525000,Guangdong,China;College of Chemical Engineering,Xiangtan University,Xiangtan 411105,Hunan,China)

机构地区：[1]广东石油化工学院化学工程学院,广东茂名525000 [2]湘潭大学化学工程学院,湖南湘潭411105

出　　处：《工业催化》2024年第1期35-40,共6页Industrial Catalysis

基　　金：广东省创强重大项目(2017KZDXM057);广东省教育厅特色创新类项目(2019KTSCX104);广东石油化工学院人才引进项目(2019rc045)。

摘　　要：采用无皂乳液聚合法制备聚甲基丙烯酸甲酯(PMMA)和聚苯乙烯(PS)胶体晶体模板剂,以制备的模板剂和经处理的P123为模板分别制备LaNiO_(3)钙钛矿氧化物。采用XRD、SEM、H 2-TPR等表征手段考察模板剂种类对LaNiO_(3)钙钛矿氧化物的晶体结构、表面形貌、还原性能以及孔径分布等的影响。结果表明,不同种类模板剂制备的样品均形成了明显的钙钛矿结构,孔径分布以介孔-介孔多级孔结构为主。孔径分布和比表面积的差异影响样品的还原性能和表面形貌。聚甲基丙烯酸甲酯为模板剂制备的LaNiO_(3)钙钛矿氧化物具有较高比表面积,还原性能较好,在0.1 MPa、350℃和40 mL·min-1氢气流量下,苯酚单程转化率达到22.48%,主要发生直接脱氧反应,产物以苯为主。Polymethyl methacrylate(PMMA)and polystyrene(PS)colloidal crystal template agents were prepared by soap-free emulsion polymerization method,and the prepared template agents and the treated P123 were used as templates to prepare LaNiO_(3)perovskite oxides,respectively.The effects of the template types on the crystal structure,surface morphology,reduction properties and pore size distribution of the LaNiO_(3)perovskite were investigated by XRD,SEM and H 2-TPR.The results showed that the samples prepared by different kinds of template agents formed obvious perovskite oxide structures,and the pore size distribution was mainly mesoporous-mesoporous hierarchical pore structure,which affected the reduction performance and surface morphology of the samples due to the difference of pore size distribution and specific surface area.The LaNiO_(3)perovskite oxides prepared when polymethyl methacrylate colloidal crystal were used as template agents had high specific surface area and good reduction performance.The single conversion of phenol reached 22.48%at 0.1 MPa,350℃and hydrogen flowrate of 40 mL·min-1.The direct deoxygenation reaction mainly occurred,and the products were mainly benzene.

关 键 词：催化化学 多级孔 LaNiO_(3) 模板种类 加氢脱氧 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]