Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
13421950 | Renewable Energy | 2020 | 6 Pages |
Abstract
In this study, we present the ethyl esters biodiesel production from Nannochloropsis oculata and Spirulina sp. microalgal lipids on 60â¯wt% CaO on Al2O3 catalyst at 50â¯Â°C and 1.0â¯atm. The activity of the catalyst was studied as a function of ethanol:lipid molar ratios, catalyst amounts and reaction times. It was found that 6â¯wt% of the lipids as catalyst amount resulted in 59% biodiesel yield in 30â¯minâ¯at 12 of ethanol:lipid molar ratio whereas 90-99% biodiesel yield was obtained at 24 and 48 of ethanol:lipid molar ratios. In order to achieve 90-99% yields, the basic strength was found to be weak and to be in the form of bicarbonate, whereas high basicity was not necessary. Besides, pure CaO and Al2O3 were not active under the same reaction conditions. We found that the glycerolysis of triacylglyceride occurred in series with the reverse of the transesterification of the triacylglyceride when the catalyst amount was 6â¯wt% of the lipids and the ethanol:lipid molar ratio was 24 and 48 and the reaction time was 60â¯min.
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Authors
Berk Turkkul, Ozgun Deliismail, Erol Seker,