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Synthesis and characteristics of Y-zeolite/MCM-48 biporous molecular sieve

Paper ID Volume ID Publish Year Pages File Format Full-Text
43327 45964 2008 7 PDF Available
Title
Synthesis and characteristics of Y-zeolite/MCM-48 biporous molecular sieve
Abstract

Y-zeolite/MCM-48 biporous molecular sieve has been synthesized in the mode of overgrowth of MCM-48 on the surface of pre-added zeolite Y. The as-synthesized sample was characterized by XRD, SEM, TEM, IR and nitrogen sorption methods and the corresponding hydrothermal stability was studied. It is found that the composite material exhibits both properties of mesoporous MCM-48 and microporous Y-zeolite sieves. The DFT pore diameter mainly located at 1.2 and 3.2 nm. In the progress of synthesis, the pre-added NaY acts as a seed material and MCM-48 overgrow on the surface of Y-zeolite. Compared with MCM-48 molecular sieve, this new biporous molecular sieve shows a higher hydrothermal stability, which results in its thicker pore-wall, and stronger acidity.

Graphical abstractNaY/MCM-48 composite molecular sieve was successfully synthesized in this article. The composite was characterized and showed both properties of mesoporous MCM-48 and microporous Y-zeolite sieve and the results show that MCM-48 grows on the surface of Y-zeolite during the preparation of the composites. Compared with Si-MCM-48 molecular sieve, the composite material shows a higher hydrothermal stability, which results in the thicker pore-wall of the composite material, and stronger acidity.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Y-zeolite/MCM-48; Overgrowth; Hydrothermal stability; Acidity; Thicker pore-wall
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Synthesis and characteristics of Y-zeolite/MCM-48 biporous molecular sieve
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 345, Issue 1, 31 July 2008, Pages 73–79
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us