摘要
采用X射线荧光分析仪、X射线衍射仪、N_(2)物理吸附仪、场发射扫描电子显微镜等仪器表征了苏州、广西和美国佐治亚州3个产地的高岭土,并以此3种高岭土为原料制备了模型催化裂化(FCC)催化剂,在ACE评价装置上对比了模型催化剂的反应性能。结果表明:苏州及广西高岭土主要组分为高岭石,佐治亚高岭土主要组分为地开石及珍珠陶土;苏州高岭土呈片状,还含有少量棒状颗粒;广西高岭土呈多层片状,晶粒粒径较大;佐治亚高岭土呈薄片状,晶粒粒径较小;3种高岭土制备的模型催化剂反应活性、Na_(2)O及RE_(2)O_(3)质量分数相近;广西高岭土制备的模型催化剂具有最大的孔体积和磨损指数,但比表面积最小,具有较强的重油转化能力,其目标产物(液化气+汽油)和副产物(干气+焦炭)收率都高于苏州、佐治亚高岭土制备的催化剂的。
The physicochemical properties of the kaolin samples from Suzhou,Guangxi and Georgia were studied by XRF,XRD,N_(2) physical adsorption,and field emission SEM,the model fluid catalytic cracking(FCC)catalysts containing three kaolin samples were prepared and their heavy oil cracking performance was studied on the ACE unit.The results showed that the main component of Suzhou and Guangxi kaolin was kaolinite,while the main components of Georgia kaolin were dickite and nacrite.Suzhou kaolin was plate-shaped and contained a small amount of rod-shaped particles;Guangxi kaolin was sheet-shaped,but with a bigger particle size;Georgia kaolin was also sheet-shaped and with a smaller particle size.The model catalysts containing three kaolin samples had similar reaction performance and mass fraction of Na_(2)O and RE_(2)O_(3),the model catalyst containing Guangxi kaolin had the highest pore volume and attrition index,but the lowest specific surface area,and strong ability of heavy oil conversion,the yields of target product(gasoline and liquefied petroleum gas)and by-products(dry gas and coke)were higher than those of the model catalyst containing Suzhou,Georgia kaolin.
作者
任世宏
付满平
谢鑫
杜晓辉
刘璞生
REN Shi-hong;FU Man-ping;XIE Xin;DU Xiao-hui;LIU Pu-sheng(Lanzhou Petrochemical Research Center,Petrochemical Research Institute,PetroChina,Lanzhou 730060,China;Ningxia Petrochemical Company,PetroChina,Yinchuan 750021,China)
出处
《石化技术与应用》
CAS
2021年第4期247-250,共4页
Petrochemical Technology & Application
基金
中国石油重大科技专项(项目编号:2018 E-03)。
关键词
催化裂化
催化剂
载体
高岭土
重油
转化率
fluid catalytic cracking
catalyst
matrix
kaolin
heavy oil
conversion
