两步晶化法合成L/ZSM-5复合分子筛及其表征  

Synthesis by Two-Step Crystallization Method and Characterization of L/ZSM-5 Composite Zeolite

作　　者：陈新兴[1,2] 郭士岭[1] 陈宜俍[1] 高雄厚 张广瑞 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001 [2]河南心连心化肥有限公司,河南新乡453731 [3]中国石油兰州化工研究中心,甘肃兰州730060

出　　处：《石油学报（石油加工）》2011年第2期322-327,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：中国石油天然气股份有限公司对外协作项目(040508-02-2)资助

摘　　要：采用两步晶化法合成L/ZSM-5复合分子筛,考察了第二步晶化过程中不同铝源、硅/铝摩尔比(n(SiO2)/n(Al2O3))及晶化时间对L/ZSM-5复合分子筛合成的影响,采用X射线粉末衍射(XRD)、傅里叶变换红外光谱(FTIR)及扫描电镜(SEM)表征了合成样品。结果表明,合成的样品为L/ZSM-5复合分子筛,其最优合成条件为n(SiO2)/n(Al2O3)为45、晶化温度150℃、晶化时间36 h。L/ZSM-5 composite zeolite was synthesized by two-step crystallization procedure.The effects of crystallization factors during the second step of two-step crystallization procedure,such as n（SiO2）/n（Al2O3）,crystallization time,different kinds of aluminum sources,on the formation of L/ZSM-5 composite zeolite were investigated.The synthesized samples were characterized by X-ray powder diffraction（XRD）,infrared spectroscope（FT-IR） and scanning electron microscope（SEM）.The results showed that the synthesized sample was L/ZSM-5 composite zeolite.The best synthesis conditions were the crystallization temperature of 150℃,crystallization time of 36 h and the molar ratio of SiO2 to Al2O3 of 45.

关 键 词：两步晶化法 L/ZSM-5 复合分子筛 

分 类 号：TQ17[化学工程—硅酸盐工业] TQ424.25