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Urea solution treatment: A facile and moderate approach to achieve hierarchical zeolite beta

Paper ID Volume ID Publish Year Pages File Format Full-Text
49695 46760 2016 4 PDF Available
Title
Urea solution treatment: A facile and moderate approach to achieve hierarchical zeolite beta
Abstract

•Urea solution is firstly employed in the preparation of hierarchical zeolite beta.•In situ decompostion of urea solution provide a mild and stable alkaline media.•Hierarchical zeolite beta is succesfully prepared without loss of crystallinity.•This method is available even for zeolite beta with Si/Al ratio as high as 75.•Hierarchical zeolite beta showed improved catalytic performance in nopol synthesis.

Hierarchical zeolite beta is successfully obtained via treating microporous zeolite beta with urea solution. Desilication takes place in a mild and stable alkaline media provided by the hydrolysis of urea solution. The hierarchy can be easily controlled by adjusting treatment temperature and time, the amount of urea solution and Si/Al ratio of the starting zeolite without loss of crystallinity. The resultant hierarchical zeolite beta can be directly used in acid catalytic reactions without tedious ammonium exchange, and it exhibits improved catalytic performance in nopol synthesis.

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Keywords
Zeolite beta; Hierarchical structure; Urea solution treatment; Nopol synthesis
First Page Preview
Urea solution treatment: A facile and moderate approach to achieve hierarchical zeolite beta
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 83, 5 August 2016, Pages 66–69
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis