Crystal growth study of K-F nanozeolite and its catalytic behavior in Aldol condensation of benzaldehyde and heptanal enhanced by microwave heating

Wong, Siew Fang and Deekomwong, Krittanun and Wittayakun, Jatuporn and Ling, Tau Chuan and Muraza, Oki and Adam, Farook and Ng, Eng Poh (2017) Crystal growth study of K-F nanozeolite and its catalytic behavior in Aldol condensation of benzaldehyde and heptanal enhanced by microwave heating. Materials Chemistry and Physics, 196. pp. 295-301. ISSN 0254-0584

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Official URL: https://doi.org/10.1016/j.matchemphys.2017.04.061

Abstract

An investigation of nanosized potassium aluminosilicate F-type zeolite (K-F, structure code EDI) converted from rice husk ash (RHA) is reported. The crystallization process was studied in an organic template-free system under microwave radiation at 100 °C and the evolution was followed by spectroscopy and microscopy techniques. The study indicated that the crystallization rate of K-F zeolite was significantly enhanced using microwave radiation. The zeolite started to nucleate at 0.5 min and flattened cuboid shaped K-F zeolite crystals (ca. 39 nm, Si/Al = 1.26) were formed after 2 min onwards. The nanocrystalline K-F zeolite exhibited good catalytic performance in solvent-free Aldol condensation reaction between benzaldehyde and heptanal, with ca. 75% reactant conversion and ca. 67% jasminaldehyde selectivity even after fifth cycle of reaction.

Item Type: Article
Uncontrolled Keywords: K-F, Nanozeolite; Template-free synthesis; Microwave synthesis; Base catalyst
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 21 Oct 2019 08:08
Last Modified: 21 Oct 2019 08:08
URI: http://eprints.um.edu.my/id/eprint/22785

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