| 吕爱凝,杨冬花,李建华,马存存,李晓峰,窦涛.具有镶嵌结构T-L多级孔道复合分子筛的快速合成与表征[J].分子催化,2016,30(1):72-79 |
| 具有镶嵌结构T-L多级孔道复合分子筛的快速合成与表征 |
| Rapid Synthesis and Characterization of Hierarchical Structured T-L Composite Zeolite with the Mosaic Morphology |
| 投稿时间：2015-10-28 修订日期：2015-12-14 |
| DOI： |
| 中文关键词: 镶嵌结构 T-L复合分子筛 多级孔道 表征 |
| 英文关键词:mosaic morphology T-L Composite Zeolite hierarchical zeolite characterization |
| 基金项目:国家重点基础研究发展计划(973计划，2012CB215002)；国家自然科学基金(20973123)；山西省自然科学基金(2013011041-1) |
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| 中文摘要: |
| 采用水热法，在Na2O-K2O-Al2O3-SiO2-HMBr2-H2O体系，一步法快速合成了具有T型和L型两种结构特征的T-L复合分子筛，通过XRD、N2吸附-脱附、SEM-EDX、TEM、FT-IR和TG-DTG等手段，对合成样品的物理化学性质进行了表征。结果表明：所合成的分子筛是球形L型分子筛镶嵌在椭圆体T型分子筛一侧，形成的1~2μm左右的双结构复合分子筛；孔道性质表征说明其具有微孔和介孔的多级孔道结构，微孔平均孔径为0.82nm，介孔的孔径主要分布在3.8nm左右。通过对阳离子比R=K2O/(K2O+Na2O)影响因素进行分析，获得T型、L型及T-L复合分子筛的转化规律，R的大小在0.3~0.5范围内可以合成结晶度高的T-L复合分子筛。 |
| 英文摘要: |
| The T-L composite zeolite with the binary structures of zeolite T and zeolite L was synthesized rapidly in the system of Na2O-K2O-Al2O3-SiO2-HMBr2-H2O by a direct approach under conventional hydrothermal conditions and characterized by means of XRD, N2 adsorption-desorption, SEM-EDX, TEM and FT-IR. The results showed that the synthetic sample possessed a composite phase with the mosaic morphology about 1~2 μm of zeolite L grow on one side of zeolite T particle. The promotion effect is attributed to complex pore channel structure in the T-L composite zeolite: the composite sample has hierarchical structure, coupled with an uniform micropore size of about 0.82nm and an average mesopore size of 3.8nm. The optimum atomic ratio of K2O/(K2O+Na2O) ranges from 0.3 to 0.5. |
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