Issue 7, 2024

Disordered medium-pore zeolite PST-24 as an efficient low-temperature isobutanol dehydration catalyst

Abstract

The synthesis of PST-24 with a relatively high Al content (Si/Al = 47), a disordered medium-pore zeolite, using the seeding technique and its catalytic properties for the low-temperature (250 °C) dehydration of isobutanol to isobutene are presented. This PST-24 was found to be considerably more active and stable for isobutanol dehydration than H-ZSM-5 and H-ferrierite with similar Si/Al ratios, the two most widely studied catalysts for this reaction, revealing its high potential as a new dehydration catalyst for biomass-derived isobutanol. While variable-temperature IR spectroscopy with adsorbed isobutanol reveals stronger interactions of isobutanol molecules with the PST-24 framework than with the latter two zeolite frameworks, 1H–13C CP MAS spectroscopy shows the formation of soft coke only in the former catalyst.

Graphical abstract: Disordered medium-pore zeolite PST-24 as an efficient low-temperature isobutanol dehydration catalyst

Supplementary files

Article information

Article type
Paper
Submitted
16 Jan 2024
Accepted
21 Feb 2024
First published
21 Feb 2024
This article is Open Access
Creative Commons BY-NC license

Catal. Sci. Technol., 2024,14, 1923-1930

Disordered medium-pore zeolite PST-24 as an efficient low-temperature isobutanol dehydration catalyst

J. H. Lee, D. Jo and S. B. Hong, Catal. Sci. Technol., 2024, 14, 1923 DOI: 10.1039/D4CY00063C

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