间甲酚和对甲酚在多级孔结构ZSM-5沸石中的液相吸附  

Liquid adsorption of metacresol and paracresol in hierarchical ZSM-5 zeolites

作　　者：孟庆伦[1] 李露露[1] 文俊俊 褚琳琳[1] 钟依均[1] 肖强[1] 

机构地区：[1]浙江师范大学物理化学研究所先进催化材料省部共建教育部重点实验室,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2015年第4期415-419,共5页Journal of Zhejiang Normal University:Natural Sciences

基　　金：国家自然科学基金资助项目(21101139;21471131)

摘　　要：在硅烷偶联剂(3-环氧乙基甲氧基丙基)三甲氧基硅烷(GPTMS)作用下合成了多级孔结构ZSM-5沸石,采用X射线粉末衍射仪、扫描电镜、透射电镜及N2吸脱附实验表征了合成样品的结构和形貌,并研究了间甲酚和对甲酚在合成的多级孔结构ZSM-5上的液相吸附行为.结果表明,合成的多级孔结构ZSM-5沸石具有丰富的介孔结构,在保持吸附量和对位选择性的情况下大幅提高了间甲酚和对甲酚在ZSM-5上的吸附速率.在此基础上对合成的多级孔结构ZSM-5进行了离子交换改性,实验结果表明,钾离子交换可提高ZSM-5的对甲酚选择性.Hierarchical ZSM-5 zeolites was synthesized with the aid of 3-glycidoxypropyltrimethoxysilane ( GPTMS).The structure and morphology of the synthesized hierarchical ZSM-5 were characterized by XRD , SEM, TEM and N2 adsorption-desorption techniques.The liquid phase adsorption behaviors of metacresol and paracresol in the prepared hierarchical ZSM-5 samples were investigated.The results indicated that due to the presence of abundent meospores in the synthesized hierarchical ZSM-5 crystals , the adsorption rate was greatly improved for both metacresol and paracresol without sacrificing the adsorption capacity and para selectivity. Futhermore, the synthesized hierarchial ZSM-5 was modified by ion-exchagement , suggested that the modifica-tion of ZSM-5 with K ion could improve the para selectivity.

关 键 词：甲酚 吸附 多级孔结构 ZSM-5沸石 (3-环氧乙基甲氧基丙基)三甲氧基硅烷 

分 类 号：O643.1[理学—物理化学]