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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

NaY/MCM-48复合分子筛的合成与表征

李永昕1, 张艳华2, 薛冰1   

  1. 1. 江苏工业学院化工系, 常州 213016;
    2. 天津大学材料科学与工程学院, 天津 300072
  • 收稿日期:2005-09-16 修回日期:2005-11-19 出版日期:2006-09-20 网络出版日期:2006-09-20

Synthesis and Characterization of NaY/MCM-48 Composite Molecular Sieve

LI Yong-Xin 1, ZHANG Yan-Hua 2, XUE Bing 1   

  1. 1. Department of Chemical Engineering, Jiangsu Polytechnic University, Changzhou 213016, China; 2. School of Material Science and Engineering, Tianjin University, Tianjin 300072, China
  • Received:2005-09-16 Revised:2005-11-19 Published:2006-09-20 Online:2006-09-20

PDF (PC)

2016

被引次数

58

摘要： 以微孔分子筛NaY为内核, 合成一种中微孔复合分子筛NaY/MCM-48. 通过XRD、SEM、TEM、IR、N_2吸附脱附和TPD等手段对复合材料进行了表征, 此外对复合材料的水热稳定性进行了考察. 研究结果表明, 复合材料同时具有中孔分子筛MCM-48和微孔NaY型沸石的特点, 并且和纯MCM-48分子筛相比孔壁增厚, 孔径变大; 与纯中孔分子筛MCM-48相比, 复合分子筛的酸性明显增强, 并且水热稳定性提高. DFT计算其孔径分布主要集中于1.2和3.2nm.

关键词: NaY/MCM-48复合分子筛, 孔壁, 孔径, 水热稳定性, 酸性

Abstract: A new material NaY/MCM-48 composite molecular sieve was prepared with NaY-zeolite as the inner core. The synthesized composite sample was characterized by XRD, SEM, TEM, IR, N 2 adsorption/desorption method and TPD. In addition, it’s hydrothermal stability was studied. The results show that the composite material has the properties of both mesoporous MCM-48 and the microporous NaY. The composite molecular sieve has thicker pore wall, larger pore size, stronger acid strength and higher hydrothermal stability than pure mesoporous molecular sieve MCM-48. The DFT pore diameter is mainly located at 1.2nm and 3.2nm.

Key words: NaY/MCM-48 composite molecular sieve, pore wall, pore size, hydrothermal stability, acid strength

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