Naslov
The Influence of the Reaction Parameters on the Synthesis of Fatty Acid Hexyl Esters

Autori
Gotovuša, Mia ; Krvavica, Matija ; Faraguna, Fabio

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
International Conference 19th Ružička days Book of Abstracts / Babić, Jurislav ; Lauš, Ivana - Osijek : Zagreb : Prehrambeno tehnološki fakultet Sveučilišta Josipa Jurja Strossmayera u Osijeku ; Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2022, 30-30

Skup
19. Ružičkini dani "Danas znanost - sutra industrija"

Mjesto i datum
Vukovar, Hrvatska, 21.09.2022. - 23.09.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
biodiesel, transesterification, hexan-1-ol, waste cooking oil, potassium hydroxide

Sažetak
Hexan-1-ol as a longer chain alcohol is used in biodiesel synthesis due to its potential to improve fuel's application properties, e.g. cetane number [1]. On the other hand, to further contribute to the sustainability of the process, waste feedstock, e.g. waste cooking oil, is also used in the transesterification reactions [2]. Fatty acid hexyl esters (FAHE) were synthesized from alcohol hexan-1-ol and waste cooking oil, in the presence of potassium hydroxide (dried in a vacuum dryer prior to the synthesis, to eliminate the presence of water, purity 89.5%), as a catalyst. Transesterification reactions were conducted isothermally, with temperature values varying from 40 to 80 °C. Samples of the reaction mixture were taken after 2, 5, 15, 30 and 60 minutes. Molar ratio of hexan-1-ol to oil was either 5:1 or 12:1, while mass fraction of the catalyst was 1 or 3 %. Reaction conversion in each experiment was determined through nuclear magnetic resonance analysis (NMR). The highest reaction conversion of 100 % was obtained at the temperature of 60 °C, after 30 minutes, with the molar ratio of the reactants being 12:1 and mass fraction of the catalyst of 3%. The increase of the molar ratio of the reactants and the mass fraction of the catalyst leads to the increase in the reaction conversion. Furthermore, the transesterification reactions achieved higher conversions at lower temperatures of 40 and 60 °C than at 80 °C, whereas the influence of time on the conversion was little to none, since the maximum conversion values were, in some cases, achieved after only 5 minutes.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Interdisciplinarne prirodne znanosti, Kemijsko inženjerstvo, Temeljne tehničke znanosti, Interdisciplinarne tehničke znanosti

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