Issue 1, 2024

A route to selectively increase the microporous structure of zeolite and its optimization in the ethanol to butadiene reaction

Abstract

Control over the pore structure of zeolite is very important, so researchers are trying to regulate the pore structure of zeolite through various methods to endow it with better performance in industrial applications. Here, a confined etching route that could selectively increase the microporous structure of zeolite is developed using ethanol/amine buffer solution. Ethanol is introduced into an aqueous amine solution, where it could decrease the migration rate and concentration of hydroxyl ions which can etch the framework atoms of zeolite to fabricate various porous structures, consequently developing a confined etching route that could selectively increase the microporous structure of zeolite, unlike conventional approaches that generally increase mesoporous and macroporous architectures. In addition, ethanol enhances the solubility of amine in water, and a buffer solution (ethanol/amine) is formed, which is able to release hydroxyl ions continuously. Based on the above confined etching route, a micropore-increased beta crystal is synthesized and when used as a carrier in ZnLaY/beta catalysts, it achieves excellent ethanol conversion of 96.04% and butadiene selectivity of 64.22% in 20 h time-on-stream in an ethanol to butadiene reaction.

Keywords: Ethanol; Confined etching route; Micropore-increased; Beta zeolite; Ethanol to butadiene.

Graphical abstract: A route to selectively increase the microporous structure of zeolite and its optimization in the ethanol to butadiene reaction

Supplementary files

Article information

Article type
Communication
Submitted
14 aug 2023
Accepted
18 sep 2023
First published
19 sep 2023
This article is Open Access
Creative Commons BY-NC license

Ind. Chem. Mater., 2024,2, 100-109

A route to selectively increase the microporous structure of zeolite and its optimization in the ethanol to butadiene reaction

T. Ye, Y. Bai, K. Wang, W. Hu, M. Zhang and L. Wu, Ind. Chem. Mater., 2024, 2, 100 DOI: 10.1039/D3IM00087G

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