无模板合成均匀单分散的ZSM-5沸石晶粒  

Template-free Synthesis of Uniform Monodispersed ZSM-5 Zeolite

作　　者：汤庆奎 朱鹏 陈景润 张伟[2] 刘海鸥[1] 张雄福[1] TANG Qingkui;ZHU Peng;CHEN Jingrun;ZHANG Wei;LIU Haiou;ZHANG Xiongfu(School of Chemical Engineering,State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian,116024,Liaoning,China;Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Dalian Institute of Chemical Physics Xiʹan Clean Energy(Chemical)Research Institute,Xiʹan 710075,China)

机构地区：[1]大连理工大学化工学院,精细化工国家重点实验室,辽宁大连116024 [2]陕西延长石油(集团)有限责任公司大连化物所西安洁净能源(化工)研究院,西安710075

出　　处：《硅酸盐学报》2021年第12期2652-2658,共7页Journal of The Chinese Ceramic Society

基　　金：陕西延长石油(集团)有限责任公司大连化物所西安洁净能源(化工)研究院项目(JJ0521SKF0001)资助。

摘　　要：在无有机模板剂和低水硅比的高浓凝胶合成体系中,采用晶种诱导法合成ZSM-5沸石,考察了不同尺寸晶种和晶种添加量对合成产物形貌的影响及放大合成效果。结果表明:3种不同的晶种均可诱导形成具有‘六边形’板状形貌的单分散均匀ZSM-5沸石。晶种大小对诱导形成的ZSM-5沸石晶粒大小有一定影响,小晶种诱导形成的ZSM-5沸石晶粒偏小、结晶度也高,而孔结构性质无明显差别;随添加的晶种量增大,诱导形成的ZSM-5沸石粒径则降低,可从微米级晶粒到亚微米级晶粒的调变,但分散性降低。对小试合成结果进行20倍规模放大,也能获得单分散均匀ZSM-5沸石晶粒,产品结晶度高而无杂晶,收率达90%以上,并具有良好的热稳定性,放大合成基本达到小试合成的效果。ZSM-5 zeolite was synthesized by a seed-induced strategy in a template-free gel synthesis system of high concentrations.The effects of seed size and seed amount on the morphology of the products were investigated,and the amplification synthesis was also conducted.The results show that the monodispersed and uniform ZSM-5 zeolite with a hexagonal plate morphology can be obtained via seed-induced synthesis.The size of seeds has an effect on the size of the induced ZSM-5 zeolite crystals.The smaller seeds can induce the formation of smaller ZSM-5 zeolite crystals.Meanwhile,little differences appear in the size distribution and pore structure of synthesized zeolites.The size of the synthesized ZSM-5 zeolite product decreases with the increase of seed amount,thus obtaining different sizes of ZSM-5 crystals from micron-scale to submicron-scale.The product preparation can be scaled up to 20 times and the product prepared in a larger scale preparation has good crystallinity and thermal stability.The yield of zeolite product can reach over 90%.

关 键 词：沸石 晶种 ZSM-5 无模板合成 

分 类 号：TQ424.25[化学工程]