| 马存存,胡丽,杨冬花,王杰,吕爱凝,李建华,李晓峰,窦涛.具有管状镶嵌结构L/EU-1复合分子筛的合成及表征[J].分子催化,2017,31(1):82-91 |
| 具有管状镶嵌结构L/EU-1复合分子筛的合成及表征 |
| Synthesis and Characterization of L/EU-1 Composite Zeolites with the Tubular Mosaic Morphology |
| 投稿时间：2017-01-06 修订日期：2017-01-31 |
| DOI： |
| 中文关键词: 极浓体系 L/EU-1 复合分子筛 表征 |
| 英文关键词:extremely dense system L/EU-1 composite zeolites characterization |
| 基金项目:国家重点基础研究发展规划（973项目，2012CB215002）；国家自然科学基金（20973123）；山西省自然科学基金（2013011041-1）；山西省高等学校大学生创新创业训练项目. |
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| 中文摘要: |
| 采用晶种法在极浓体系中，快速合成了L/EU-1复合分子筛，通过XRD、SEM、NH3-TPD、TG-DTG等多种手段对其进行了表征. 结果表明：随原始溶胶中添加硼和铁的质量分数的增加，复合分子筛中L分子筛的特征衍射峰分别向高角度和低角度方向发生偏移，L分子筛的晶胞参数和晶胞体积分别有所减小和增加；含硼和铁的L/EU-1复合分子筛尺寸大小长约为0.5~3 μm，宽0.2~1 μm，形貌为小颗粒聚集L分子筛附着生长管状镶嵌结构复合分子筛；镶嵌结构改变了复合分子筛的酸性、稳定性和孔道性质. 影响因素分析表明，碱硅比低时，K+对促进钙霞石笼的形成起主导作用，碱硅比高时，K+对溶胶的聚沉起主导作用. |
| 英文摘要: |
| L/EU-1 composite zeolites were synthesized rapidly by the method of crystal seed in extremely dense system, the synthetic samples were characterized by XRD, SEM, NH3-TPD, TG-DTG and so on. The results showed that with increasing the mass fraction of boron and iron in the original sol, the characteristic diffraction peaks of L in the composite zeolites migrated to higher angle and lower angle direction, respectively. The cell parameters and cell volume of L zeolite were decreased and increased, respectively. L/EU-1 composite zeolites contains boron and iron 0.5~3 μm long, width of 0.2~1 μm and they have the characteristics of small particle aggregation L zeolite attachment growth with the tubular mosaic structure. The mosaic structure changed the acidity, stability and pore properties of the composite zeolites. When n(K2O)/n(SiO2) is low, K+ plays a leading role in promoting the formation of cancrinite cages. When n(K2O)/n(SiO2) is high, K+ plays a dominating role in coaglulation of sol. |
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