离子交换法合成L/MCM-41复合分子筛  

Synthesis of Micro/meso-porous Composite Molecular Sieve L/MCM-41 with Ion Exchange

作　　者：卫冬燕[1] 王春芳[1] 陈宜俍[1] 徐军[1] 郭士岭[1] 詹予忠[1] 阎立军[2] 潘晖华[2] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001 [2]中国石油天然气股份有限公司石油化工研究院催化材料研究室,北京100195

出　　处：《郑州大学学报（工学版）》2012年第1期51-54,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省基础与前沿技术研究计划资助项目(82300420090)

摘　　要：以十六烷基三甲基溴化铵(CTAB)为模板剂,分别采用包埋法和离子交换法,两步晶化都合成了L/MCM-41复合分子筛,并通过XRD、SEM、TEM和BET等测试手段对合成样品进行表征,检测结果表明用离子交换法合成的复合分子筛孔径为3.04 nm.与水热晶化法合成的MCM-41相比:(1)壁厚由0.55 nm增大到1.81 nm;(2)水热稳定性也明显提高,在100℃沸腾状态下结构保持时间由原来的低于2 h增大到8 h.与L沸石相比,K+含量降低为0.26%.Micro/meso-porous composite molecular sieve L/MCM-41 was synthesized with embedding method and ion exchange using cetyl trimethyl ammonium bromide（CTAB） as template and it was confirmed by being characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electronic microscopy（TEM） and N2 absorption/ desorption.The results indicated that the pore diameter of L/MCM-41 composite molecular sieve was 3.04 nm which was bigger than that of microporous molecular sieves.Compared with MCM-41 molecular sieve synthesized by ordinary hydrothermal method： 1）the pore wall thickness increased from 0.55 nm to 1.81 nm;2） The hydrothermal stability improved significantly,the structure could keep unchanged for 8h,rising by 6 h,at 100 ℃.Compared with zeolite L,the content of K＋ decreased from 18.42% to 0.98%.

关 键 词：离子交换 介微孔复合分子筛 L/MCM-41 

分 类 号：TQ17[化学工程—硅酸盐工业] TQ424.25