高岭土微球内置固体晶种原位合成Y型沸石  

In-situ synthesis of Y-type zeolite by introducing solid seed crystal into kaolin microspheres

作　　者：熊晓云 潘志爽 胡清勋 高雄厚 XIONG Xiaoyun;PAN Zhishuang;HU Qingxun;GAO Xionghou(Lanzhou Petrochemical Research Center,PetroChina,Lanzhou 730060,China)

机构地区：[1]中国石油兰州化工研究中心,甘肃兰州730060

出　　处：《石油化工》2023年第1期14-19,共6页Petrochemical Technology

基　　金：中国石油天然气股份有限公司科技专项(2018E-03)。

摘　　要：采用常规法和高岭土微球内置晶种法制备了NaY/高岭土复合微球,利用XRD、低温N2吸附-脱附、SEM等方法对制备的复合微球进行表征,并对NaY/高岭土复合微球进一步改性制得的原位晶化催化剂进行评价。实验结果表明,内置晶种法所制备的NaY/高岭土复合微球的结晶度从18%增加到28%,介孔孔体积从0.14 cm^(3)/g增加到0.31 cm^(3)/g,常规法所制备NaY/高岭土复合微球Y型分子筛主要分布在微球外表面,而采用内置晶种法后,微球内部可观察到更多的Y型分子筛。与常规方法相比,内置晶种法所制备催化剂的重油产率从8.16%下降到4.79%,汽油产率和总液收率分别从51.31%,83.40%增加到54.92%和86.41%,生焦因子从1.62下降到1.21。NaY/kaolin composite microspheres were prepared by conventional method and seed introduction method. The prepared composite microspheres were characterized by XRD,lowtemperature N2 adsorption-desorption and SEM,and the in-situ crystallization catalysts obtained by further modification of NaY/kaolin composite microspheres were evaluated. The results show that the crystallinity of the NaY/kaolin composite microspheres prepared by seed introduction method increases from 18% to 28%,and the mesoporous volume increases from 0.14 cm^(3)/g to 0.31 cm^(3)/g.The Y-type zeolite prepared by the conventional method mainly distributes on the outer surface of the microspheres,while more Y-type zeolite can be observed inside the microspheres prepared by seed introduction method. Compared with the conventional method,the heavy oil yield using the catalyst prepared by seed introduction method decreases from 8.16% to 4.79%,the gasoline yield and total liquid yield increases from 51.31%,83.40% to 54.92% and 86.41% respectively,and the coking factor decreases from 1.62 to 1.21.

关 键 词：高岭土 Y型分子筛 晶种 介孔 原位晶化 催化裂化 

分 类 号：TQ426[化学工程]