磁性钯催化剂的制备及催化聚苯乙烯加氢的动力学研究  

Preparation of magnetic palladium catalyst and its kinetic study of polystyrene hydrogenation

作　　者：黄辉[1] 周俊涛[1] 应勤荣 陶士英[3] 

机构地区：[1]宁波工程学院化工学院,浙江宁波315016 [2]道达尔石化(宁波)有限公司,浙江宁波315204 [3]宁波诺丁汉大学工程系,浙江宁波315100

出　　处：《现代化工》2014年第4期70-73,共4页Modern Chemical Industry

基　　金：浙江省自然科学基金项目(LQ12B06002);宁波市教育科学规划研究课题成果(YGH032);宁波工程学院王伟明助创基金项目

摘　　要：采用原位法制备了以四氧化三铁为磁核的磁性钯催化剂,进行了VSM、TEM、ICP-AES、XRD等表征与测试,并考察了磁性钯催化剂催化聚苯乙烯加氢制备聚环己基乙烯的反应动力学。在消除内外扩散影响的情况下,通过测定不同反应温度时反应过程中聚苯乙烯浓度随反应时间的变化关系,得到聚苯乙烯催化加氢动力学模型,其中对聚苯乙烯呈一级反应,而对氢气呈零级反应,反应活化能为51.4 kJ/mol。磁性钯催化剂具有很好的磁分离性能。Magnetic palladium catalyst is synthesized by in situ method with ferroferric oxide as magnetic core.The samples are characterized by vibrating sample magnetometer （VSM）,transmission electron microscopy （TEM）,inductively coupled plasma-optical emission spectrometry （ICP-AES） and X-ray diffraction （XRD）.Kinetic study of hydrogenation of polystyrene to poly（cyclohexylethylene） is conducted over magnetic palladium catalyst.The relationship between reaction time and polystyrene concentration is determined at different reaction temperatures under conditions of eliminating both internal and external diffusion.The kinetic model indicates that hydrogenation of polystyrene to poly （cyclohexylethylene） over magnetic palladium catalyst is first order with respect to polystyrene and zero order with respect to hydrogen.The activation energy is 51.4 kJ/mol.The prepared magnetic palladium catalyst has good magnetic separation ability.

关 键 词：磁性 钯催化剂 聚苯乙烯 加氢 

分 类 号：TQ032.4[化学工程]