限域效应提升正仲氢转化催化剂性能研究  

Study on performance enhancement of orthohydrogen-parahydrogen conversion catalyst by physical confinement

作　　者：陈志强 宋隆 孙海云[1,2] 丁明伟 蒋榕培[1,2] 方涛[1,2] CHEN Zhi-qiang;SONG Long;SUN Hai-yun;DING Ming-wei;JIANG Rong-pei;FANG Tao(Beijing Key Laboratory of Research and Application for Aerospace Green Propellants,Beijing Institute of Aerospace Testing Technology,Beijing 100074,China;Aerospace Liquid Propellant Research Center,Beijing Institute of Aerospace Testing Technology,Beijing 100074,China)

机构地区：[1]北京航天试验技术研究所航天绿色推进剂研究与应用北京市重点实验室,北京100074 [2]北京航天试验技术研究所航天液体推进剂研究中心,北京100074

出　　处：《现代化工》2024年第5期206-211,共6页Modern Chemical Industry

摘　　要：为制备高性能正仲氢转化铁系催化剂,在二氧化硅材料的孔道内原位制备铁基氧化物,借助于二氧化硅对铁基物种的限域效应调控催化剂性质,进而制备出高性能催化剂。采用多种表征手段研究分析了限域效应对催化剂性质的影响。结果表明,利用限域效应可有效调控催化剂性质,进而提升催化剂性能。以硅源与模板剂的摩尔比为20∶1制备的二氧化硅材料为载体的正仲氢转化铁系催化剂,在液氮温度(-196℃)、体积空速为600 min^(-1)的条件下,正氢转化率可达47.2%,装置出口处仲氢体积分数可达36.4%。In order to prepare high performance catalyst for orthohydrogen-parahydrogen conversion,Fe-based active species are prepared in-situ in the pores of SiO2 material.The properties of the catalyst are regulated by means of physical confinement of SiO_(2) to Fe-based species,so as to improve the performance of the catalyst.The influences of physical confinement on catalyst properties are studied by means of various characterization methods,and the relationship between physical confinement and catalyst properties is analyzed.The results show that the physical confinement can be utilized to effectively regulate the properties of catalyst and improve the performance of catalyst.The catalyst that is prepared with a silicon source to template agent mole ratio of 20∶1 can deliver an orthohydrogen conversion rate of 472%under liquid-nitrogen temperature and a volume space velocity of 600 min^(-1).The content of parahydrogen at the outlet of the device reaches 47%.

关 键 词：正仲氢转化 铁基催化剂 限域效应 二氧化硅 

分 类 号：TQ426[化学工程]