燃料化学学报（中英文）2025，Vol.53Issue(5)：672-682,11.DOI:10.1016/S1872-5813(24)60515-3
ZSM-22/ZSM-48复合分子筛催化剂调节正十二烷临氢异构化产物分布
Modulating isomers distribution of n-dodecane hydroisomerization by using ZSM-22/ZSM-48 composite zeolite
摘要
Abstract
ZSM-22 and ZSM-48 zeolites are different in their topological structure and show distinct catalytic performance in the hydroisomerization of n-alkanes,especially in the distribution of produced isomers.In this work,ZSM-22/ZSM-48 composite zeolites are synthesized by the mechanical mixing method and the secondary hydrothermal synthesis;the zeolite samples are characterized by XRD,SEM,NH3-TPD and N2 sorption and their catalytic performance in the hydroisomerization of n-dodecane was comparatively investigated.The results indicate that the ZSM-22/ZSM-48 composite zeolites exhibit combined properties of the two individual zeolites;their surface area,micropore volume,micropore area and acidity lie between those of the single ZSM-22 and ZSM-48 zeolites.For the hydroisomerization of n-dodecane,the percentage of 2-methylundecane in the monobranched iso-dodecane product is 19%-44%over the Pt/ZSM-22/ZSM-48-S composite zeolite,which is about 20%higher than that over Pt/ZSM-48 and about 10%lower than that over Pt/ZSM-22;in addition,the percentage of 5-methylundecane in the monobranched iso-dodecane products over Pt/ZSM-22/ZSM-48-S is 23%-42%,which is about 8%higher than that over Pt/ZSM-22 and about 13%lower than that over Pt/ZSM-48.The results suggest that the distribution of the isomer products of n-alkanes hydroisomerization can be regulated by adjusting the mass ratio of two zeolites of different topological structures(i.e.,ZSM-22 and ZSM-48)in the Pt/ZSM-22/ZSM-48 composite zeolite catalyst.关键词
ZSM-22/ZSM-48/复合分子筛/临氢异构/正十二烷Key words
ZSM-22/ZSM-48/composite zeolites/hydroisomerization/n-dodecane分类
石油、天然气工程引用本文复制引用
王玉婷,侯建乐,李瑞丰,张巍,马梦茜,王琰,盖立敏,郑家军,代卫炯,秦波,王小伟..ZSM-22/ZSM-48复合分子筛催化剂调节正十二烷临氢异构化产物分布[J].燃料化学学报（中英文）,2025,53(5):672-682,11.基金项目
The project was supported by the National Key Research and Development Program(2020YFB0606405),Shanxi Basic Research Program(202203021221055),National Spontaneous Combustion Science Foundation(22378286,22378293,22302143,U21B20100),Central Guidance for Local Science and Technology Development Funding Projects(YDZJSX2021A014),Sinopec(Dalian)Petrochemical Research Institute Co.(122027)and Lvliang School-Land Cooperation Platfrom Base Construction Project(Key laboratory,2022XDHZ04). 国家重点研发计划(2020YFB0606405),山西省基础研究计划(202203021221055),国家自然科学基金(22378286,22378293,22302143,U21B20100),中央引导地方科技发展资金(YDZJSX2021A014),中石化(大连)石油化工研究院有限公司(122027),吕梁市校地合作平台基地建设项目(重点实验室,2022XDHZ04)资助 （2020YFB0606405）
