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Esterification of linoleic acid using HZSM-5 zeolites with different Si/Al ratios

Show simple item record Fawaz, E.G Salam, Darine.A Daou, T.J 2022-10-14T12:08:53Z 2022-10-14T12:08:53Z 2020
dc.identifier.citation Catalytic improvement of biomass conversion: Effect of adding mesoporosity on MOR zeolite for esterification with oleic acid Gomes G.J., Costa M.B., Bittencourt P.R.S., Zalazar M.F. and Arroyo P.A. Renewable Energy • November 2021 • Pages 1-12
dc.description.abstract Microporous HZSM-5 zeolite crystals of distinct Si/Al ratios (53, 33.3 and 14.4) were compared for linoleic acid esterification with methanol as a model reaction for the production of biodiesel. As-synthesized catalytic materials were characterized using XRD, SEM, TEM, N2 sorption, X-Ray fluorescence, FTIR, and 27Al MAS NMR. The results showed that HZSM-5 with higher acidity and lower Si/Al ratio achieved high linoleic acid conversions at earlier stages of the reaction, whereas more hydrophobic zeolites reached higher conversions as reaction time increased. A maximum methyl linoleate yield of 79.78% was achieved for the esterification of linoleic acid using HZSM-5 (Si/Al = 53) at 4 h reaction time, 6:1 methanol to linoleic acid molar ratio, 10 wt% catalyst loading and 180 °C. Linoleic acid is activated by being adsorbed on the acid sites of the zeolite surface with increased Si/Al ratios and reacts to form the corresponding methyl ester. © 2019 Elsevier Inc.
dc.language.iso en
dc.publisher Elsevier Ltd
dc.subject Acidity;
dc.subject Hydrophobicity
dc.subject Si/Al
dc.subject Transesterification;
dc.subject Zeolites
dc.title Esterification of linoleic acid using HZSM-5 zeolites with different Si/Al ratios
dc.type Article

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