石油化工高等学校学报2024，Vol.37Issue(5)：38-45,8.DOI:10.12422/j.issn.1006-396X.2024.05.005
Y分子筛的氢转移反应性能及其调控机制
Hydrogen Transfer Reaction Performance and Regulation Mechanism of Y Zeolites
摘要
Abstract
The hydrogen transfer properties of HY zeolite and lanthanum ion modified Y(LaHY)zeolite were investigated using in situ FTIR technology.Combined with characterization data of zeolite crystal structure,texture properties,and acidity,the regulatory mechanism of rare earth modification and hydrothermal treatment on the hydrogen transfer reaction performance of Y zeolite was explored.The results show that the Brønsted(B)acid density and strong acid strength of Y zeolite decreased,while rare earth species located in the supercage formed weak Lewis(L)acid sites.The synergistic effect of B acid and L acid sites in the supercage promoted the occurrence of hydrogen transfer reaction.After hydrothermal treatment,the total acidity of HY-LH and LaHY-LH zeolites significantly decreased,and the L acid centers related to rare earth species in the supercages completely disappeared,which significantly reduced the hydrogen transfer reaction performance of HY zeolites.The research results can provide important theoretical guidance for a deeper understanding of the laws of hydrogen transfer reactions in catalytic cracking reactions,as well as achieving the goals of regulating olefin product selectivity and inhibiting coking deactivation.关键词
LaHY分子筛/水热处理/环己烯/氢转移反应/抑制生焦Key words
LaHY zeolite/Hydrothermal treatment/Cyclohexene/Hydrogen transfer reaction/Coke inhibition分类
化学化工引用本文复制引用
李志颖,杜晓辉,郑云锋,耿忠兴,秦玉才,高雄厚,宋丽娟..Y分子筛的氢转移反应性能及其调控机制[J].石油化工高等学校学报,2024,37(5):38-45,8.基金项目
国家自然科学基金项目(U20A20120,21902068) （U20A20120,21902068）
辽宁省兴辽英才计划项目(XLYC2203165) （XLYC2203165）
中国石油天然气股份有限公司科技专项外协项目(2021DJ0701). （2021DJ0701）
