三元孔道结构纳米ZSM-5分子筛团聚体的合成
收稿日期: 2020-06-15
网络出版日期: 2020-12-15
Synthesis of aggregated nano-sized ZSM-5 zeolite with ternary pore structure
Received date: 2020-06-15
Online published: 2020-12-15
采用正丁胺和ZSM-5晶种双模板体系水热合成了一系列ZSM-5分子筛,考察了晶种、正丁胺添加量和晶化条件对分子筛物理化学性能、孔道结构和形貌的影响。对所得分子筛分别进行X射线衍射（XRD）、氮气吸-脱附、扫描电子显微镜（SEM）表征分析。结果表明：分子筛为三元孔道结构的纳米ZSM-5分子筛团聚体,正丁胺和晶种在合成过程中具有协同作用。在正丁胺与二氧化硅物质的量比为0.26、晶种添加量为3%（质量分数）、在120 ℃晶化24 h后再在170 ℃晶化48 h条件下合成的分子筛总比表面积和外比表面积分别为364 m2/g和59 m2/g。
关键词： 纳米ZSM-5分子筛团聚体; 正丁胺; 晶种; 协同作用
李孝国 , 米晓彤 , 侯章贵 . 三元孔道结构纳米ZSM-5分子筛团聚体的合成[J]. 无机盐工业, 2020 , 52(12) : 104 -108 . DOI: 10.11962/1006-4990.2020-0235
A series of ZSM-5 zeolite were hydrothermally synthesized by using the double template system of n-butylamine and ZSM-5 crystal seed.The influence of content of seed and n-butylamine,and crystallication process on the physicochemical properties,pore structure and morphology of obtained zeolites were investigated.The obtained zeolites were subjected to X-ray diffraction（XRD）,N2 adsorption-desorption and scanning electron microscopy（SEM） characterization analysis.The analysis results showed that the obtained material was aggregated nano-sized ZSM-5 zeolite with ternary pore structure,and n-butylamine and seed crystals had a synergistic effect in the synthesis process.Under the synthesis conditions of n（n-butyla-mine）/n（SiO2）=0.26,seed addition amount of 3%（mass fraction） and crystallization at 120 ℃ for 24 h and then at 170 ℃ for 48 h,the specific surface area and external surface area were 364 m2/g and 59 m2/g,respectively.
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