磷改性工艺对ZSM-5分子筛催化裂化增产丙烯性能的影响  

EFFECT OF PHOSPHORUS MODIFICATION PROCESS ON CATALYTIC CRACKING PERFORMANCE OF ZSM-5 ZEOLITE FOR INCREASING PROPYLENE PRODUCTION

作　　者：李雪礼 侯硕旻 段宏昌 路瑞玲 张琰图[1] Li Xueli;Hou Shuomin;Duan Hongchang;Lu Ruiling;Zhang Yantu(Shaanxi Key Laboratory of Chemical Reaction Engineering,College of Chemistry and Chemical Engineering,Yan’an University,Yan’an,Shaanxi 716000;Lanzhou Petrochemical Research Center,PetroChina Petrochemical Research Institute)

机构地区：[1]陕西省化学反应工程重点实验室,延安大学化学与化工学院,陕西延安716000 [2]中国石油石油化工研究院兰州化工研究中心

出　　处：《石油炼制与化工》2023年第8期74-82,共9页Petroleum Processing and Petrochemicals

基　　金：陕西省自然科学基础研究计划项目(2020-JM549;2023-JC-YB-117)。

摘　　要：采用等体积浸渍法、水热分散法和高温水热法对ZSM-5分子筛进行磷元素改性,制备了不同工艺改性分子筛,通过X射线衍射、透射电镜、扫描电镜等表征以及催化裂化(FCC)增产丙烯的性能评价,分析不同改性工艺对ZSM-5分子筛物理化学性质和FCC增产丙烯性能的影响。结果表明:不同工艺改性对比,随着改性温度的升高,分子筛的孔体积增大,酸性增强;等体积浸渍法改性时磷与分子筛相互作用较弱,水热分散法和高温水热法改性时磷与分子筛相互作用较强;基于水热分散法改性ZSM-5分子筛制备的助剂,其FCC丙烯收率最高,达到12.43%。ZSM-5 zeolites were modified with phosphorus by incipient-wetness impregnation method,hydrothermal dispersion method and high-temperature hydrothermal method,respectively.The phosphorus modified zeolites were analyzed by XRD,TEM,SEM,etc.The performance of increasing propylene production in FCC process was evaluated.The results showed that the pore volume and the acidity of the modified zeolites increased with the increase of the modification temperature.The interaction between P and zeolites was weak by incipient-wetness impregnation,and strong by hydrothermal dispersion or high-temperature hydrothermal.The evaluation results showed that the propylene yield of the additives with ZSM-5 modified by hydrothermal dispersion was the highest,reaching 12.43%.

关 键 词：改性工艺 ZSM-5分子筛 磷改性 催化裂化 丙烯 

分 类 号：TQ221.212[化学工程—有机化工] TE624.41[石油与天然气工程—油气加工工程]