FCC催化剂传质性能与孔结构和酸性的关联性探究  

Study on the Correlation between Mass Transfer Performance and Pore Structure and Acidity of FCC Catalysts

作　　者：王焕 熊晓云[3] 郑云锋 孙祥博 关慧敏 李强 宋丽娟 WANG Huan;XIONG Xiaoyun;ZHENG Yunfeng;SUN Xiangbo;GUAN Huimin;LI Qiang;SONG Lijuan(School of Chemical Engineering,China University of Petroleum(East China),Qingdao Shandong 266000,China;School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China;PetroChina Lanzhou Petrochemical Research Center,China Petroleum Petrochemical Research Institute,Lanzhou Gansu 730060,China)

机构地区：[1]中国石油大学(华东)化学工程学院,山东青岛266000 [2]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [3]中国石油石油化工研究院兰州化工研究中心,甘肃兰州730060

出　　处：《石油化工高等学校学报》2024年第3期58-65,共8页Journal of Petrochemical Universities

基　　金：国家自然科学基金资助项目(U20A20120,21902068);“兴辽英才计划”项目(XLYC2203165);中国石油天然气股份有限公司科技专项外协项目(KYWX-22-002)。

摘　　要：为研究流化催化裂化(FCC)催化剂的传质性能与其孔结构和酸性的关联性,制备了3种具有不同孔结构和酸性的半合成FCC催化剂(CAT1、CAT2、CAT3),并对催化剂的孔结构和酸性进行了系统表征;选用萘、菲、吖啶作为探针分子,测试客体分子在催化剂上的吸附穿透性能,并考察了其传质性能;采用超分辨成像技术,对催化剂上酸中心转化能力进行了可视化分析。结果表明,通过选择合适的探针分子,可实现FCC催化剂对大分子的吸附行为差异性的有效辨析;FCC催化剂上大分子的传质性能取决于催化剂的孔结构和表面酸性;使用新型大孔基质材料可优化FCC催化剂的传质性能,提升FCC催化剂中Y分子筛上酸中心的转化能力。研究结果可为FCC催化剂传质构效关系的研究提供有效方案,并且可为高效FCC催化剂的设计提供理论指导。In order to study the correlation between the mass transfer performance of fluid catalytic cracking(FCC)catalysts and their pore structure and acidity,three semi synthetic FCC catalyst samples(CAT1,CAT2,CAT3)with different pore structure and acidity were prepared.Naphthalene,phenanthrene and acridine were selected as probe molecules to test the adsorption penetration performance of the guest molecules on the catalysts and to investigate their mass transfer performance.The ability of acid center conversion on catalysts was visualized and analyzed using super-resolution imaging technology.The results show that effective discrimination of the differential adsorption behavior of FCC catalysts for macromolecules can be achieved by selecting suitable probe molecules.The mass transfer performance of macromolecules on FCC catalysts depends on the pore structure and surface acidity of the catalysts.The use of novel macroporous matrix materials optimizes the mass transfer performance of FCC catalysts and enhances the acid on Y molecular sieves in FCC catalysts centers in FCC catalysts.The work can provide an effective solution for studying the mass transfer structure-activity relationship of FCC catalysts,and also provide theoretical guidance for the design of efficient FCC catalysts.

关 键 词：FCC催化剂 传质 介孔 穿透曲线 酸性 

分 类 号：TQ021.4[化学工程]