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NaY/MCM-48复合分子筛的合成与表征
引用本文:李永昕,张艳华,薛冰.NaY/MCM-48复合分子筛的合成与表征[J].无机材料学报,2006,21(5):1209-1216.
作者姓名:李永昕  张艳华  薛冰
作者单位: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
基金项目:国家重点基础研究发展计划(973计划)
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、N2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
文章编号:1000-324X(2006)05-1209-08
收稿时间:09 16 2005 12:00AM
修稿时间:2005-09-162005-11-19

Synthesis and Characterization of NaY/MCM-48 Composite Molecular Sieve
LI Yong-Xin,ZHANG Yan-Hua,XUE Bing.Synthesis and Characterization of NaY/MCM-48 Composite Molecular Sieve[J].Journal of Inorganic Materials,2006,21(5):1209-1216.
Authors:LI Yong-Xin  ZHANG Yan-Hua  XUE Bing
Institution:1. Department of Chemical Engineering, Jiangsu Polytechnic University, Changzhou 213016, China; 2 School of Material Science and Engineering, Tianjin University, Tianjin 300072, China
Abstract:A new material NaY/MCM-48 composite molecular sieve was prepared with NaYzeolite as the inner core. The synthesized composite sample was characterized by XRD, SEM, TEM, IR, N2 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.
Keywords:NaY/MCM-48 composite molecular sieve  pore wall  pore size  hydrothermal stability  acid strength
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