FCC催化剂传质强化活性位利用效率的可视化分析  

Visual analysis of mass transfer enhanced active site utilization efficiency of FCC catalyst

作　　者：王冉 王焕[2] 熊晓云 关慧敏 郑云锋 陈彩琳 秦玉才 宋丽娟[1,2] WANG Ran;WANG Huan;XIONG Xiaoyun;GUAN Huimin;ZHENG Yunfeng;CHEN Cailin;QIN Yucai;SONG Lijuan(College of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,Liaoning,China;College of Chemistry and Chemical Engineering,China University of Petroleum,Qingdao 266580,Shandong,China;PetroChina Lanzhou Petrochemical Research Center,Lanzhou 730060,Gansu,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [2]中国石油大学(华东)化学化工学院,山东青岛266580 [3]中国石油石油化工研究院兰州石油化工研究中心,甘肃兰州730060

出　　处：《化工学报》2024年第9期3198-3209,共12页CIESC Journal

基　　金：国家自然科学基金项目(U20A20120,21902068);中国石油天然气股份有限公司科技专项(KYWX-22-002);辽宁省兴辽计划项目(XLYC2203165)。

摘　　要：流化催化裂化(FCC)催化剂传质性能抑制活性位利用效率是影响其催化性能的关键因素,选用6种不同基质材料制备的FCC催化剂样品,在系统分析催化孔结构和酸性质的基础上,利用激光共聚焦荧光显微成像技术和吸附穿透曲线法模拟考察了重油大分子的传质扩散行为;并运用单分子荧光成像技术,以B酸中心催化噻吩低聚反应生成低聚物的数量作为判据考察了系列催化剂的活性位利用效率。研究发现,相比于传统的高岭土和拟薄水铝石作为基质材料,本课题组设计开发的大孔富B酸的基质材料(APM-9)明显优化了大分子在FCC催化剂上的传质性能,从而显著提升了活性位的利用效率。发展了一种新颖的FCC催化剂结构参数与其传质性能、酸中心利用效率构效关系建立的方法,可为催化剂基质材料的设计和优化提供数据支撑和理论指导。The mass transfer performance of fluid catalytic cracking(FCC)catalysts inhibits the utilization efficiency of active sites,which is a key factor affecting its catalytic performance.In this paper,FCC catalyst samples prepared by 6 different matrix materials were selected,and the catalytic pore structure and acid properties were systematically analyzed.The mass transfer and diffusion behavior of heavy oil macromolecules were simulated by laser confocal fluorescence microscopy and adsorption penetration curve method.The utilization efficiency of active sites of the catalysts was investigated by using single molecule fluorescence imaging technique,and the number of oligomers produced by the oligomerization of thiophene catalyzed by B acid site was used as the criterion.It was found that compared with traditional kaolin and pseudo-boehmite as matrix materials,the macro-porous matrix material(APM-9)with abundant B acid sites designed and developed by our team significantly optimized the uploading performance of macromolecules on FCC catalysts,thus significantly improving the utilization efficiency of active sites.In this paper,a novel method to establish the structure-activity relationship between FCC catalyst structure parameters,its mass transfer performance and acid center utilization efficiency is developed,which can provide data support and theoretical guidance for the design and optimization of catalyst matrix materials.

关 键 词：FCC催化剂 大孔基质 荧光显微成像技术 传质 酸催化 

分 类 号：O603[理学—化学]