Offretite Zeolite Single Crystals Synthesized by Amphiphile-Templating Approach

Offretite zeolite synthesis in the presence of cetyltrimethylammonium bromide (CTABr) is reported. The offretite crystals were synthesized with a high crystallinity and hexagonal prismatic shape after only 72 h of hydrothermal treatment at 180 °C. The CTABr has dual-functions during the crystallizat...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2021-04, Vol.26 (8), p.2238
Main Authors: Ng, Eng-Poh, Ahmad, Nur Hidayahni, Khoerunnisa, Fitri, Mintova, Svetlana, Ling, Tau Chuan, Daou, T Jean
Format: Article
Language:English
Subjects:
Acylation
acylation of 2-methylfuran
Adsorption
amphiphile-templating approach
Biofuels
crystal growth
Crystal structure
Crystallinity
Crystallization
Crystals
hierarchical zeolites
Hydrothermal treatment
offretite zeolite
Pore size
Selectivity
Single crystals
Structural hierarchy
Zeolites
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Summary:Offretite zeolite synthesis in the presence of cetyltrimethylammonium bromide (CTABr) is reported. The offretite crystals were synthesized with a high crystallinity and hexagonal prismatic shape after only 72 h of hydrothermal treatment at 180 °C. The CTABr has dual-functions during the crystallization of offretite, viz. as structure-directing agent and as mesoporogen. The resulting offretite crystals, with a Si/Al ratio of 4.1, possess more acid sites than the conventional offretite due to their high crystallinity and hierarchical structure. The synthesized offretite is also more reactive than its conventional counterpart in the acylation of 2-methylfuran for biofuel production under non-microwave instant heating condition, giving 83.5% conversion with 100% selectivity to the desired product 2-acetyl-5-methylfuran. Hence, this amphiphile synthesis approach offers another cost-effective and alternative route for crystallizing zeolite materials that require expensive organic templates.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules26082238