Advances in synthesis and applications of Y/β core-shell composite molecular sieves

doi:10.16085/j.issn.1000-6613.2016.s2.026

Abstract

Abstract: The studies on synthesis and applications of Y/β core-shell composite molecular sieves in recent years are reviewed in this paper.There are good prospects in Y/β core-shell composites with the abilities of hydrocracking and isomerization.The key to playing its role is the preparation method.Five methods are introduced,including zeolite as silica/aluminum sources method,two-step crystallization process,ion-exchanging,precursor-treating,seeding method.Advantages and disadvantages are also discussed in this paper.The composite molecular sieves are applied in catalytic cracking,hydrocracking,isomerization,synthesis of organic compound and so on.Finally,the developing trend of Y/β core-shell composite is reducing the thickness of the core to nanoscale.

Key words: molecular sieves, composites, preparation

摘要： Y/β核壳结构复合分子筛具有适宜可调的酸性和孔道结构，既具有Y分子筛较好的裂化性能，又具有β分子筛较好的异构化性能，在催化领域受到较为广泛的关注。两种分子筛的有效复合是其发挥作用的重要前提。本文综述了近年来Y/β核壳结构复合分子筛的制备方法，包括硅铝源法、两步晶化法、离子交换法、前体处理法及预置晶种法；分析比较了各种方法的优点以及不足。介绍了该核壳结构复合分子筛在催化裂化、加氢裂化、异构化、有机化工体合成等催化过程方面的应用。在此基础上提出了纳米级壳层厚度的Y/β核壳结构复合分子筛是未来发展趋势，且其在催化领域有着广泛的应用前景。

关键词: 分子筛, 复合材料, 制备

CLC Number:

TE65

WANG Yingyun, ZHOU Yasong, WEI Qiang, YANG Xiaoyu. Advances in synthesis and applications of Y/β core-shell composite molecular sieves[J]. Chemical Industry and Engineering Progree, 2016, 35(S2): 155-159.

王迎运, 周亚松, 魏强, 杨晓宇. Y/β复合分子筛制备方法及应用研究进展[J]. 化工进展, 2016, 35(S2): 155-159.

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