Akademik Veri Yönetim Sistemi
Journal of the Faculty of Engineering and Architecture of Gazi University, cilt.39, sa.3, ss.1583-1595, 2024 (SCI-Expanded)
This study synthesized plant-based biodiesel by applying a base-catalyzed transesterification process to hazelnut oil with high unsaturated fatty acid content. Ultrasonic bath treatment was carried out to purify the study's biodiesel and increase the reaction efficiency. The effects of chemical changes in the structure of biodiesel on physical properties were investigated by applying ultrasonication to the obtained biodiesel samples at different times. First, after the free fatty acidity was determined, a refined hazelnut oil transesterification reaction was carried out with methyl alcohol at 55°C under NaOH catalysis. Afterward, ultrasonic bathing was applied to biodiesel samples for specific periods, and its effect on the structure and characteristics of biodiesel was tested. As a result, FTIR analyses of ultrasonically treated hazelnut oil biodiesel samples showed that sonication application time directly affected transesterification; it was determined that while reaction efficiency increased at low application times, biodiesel yield decreased at higher application times. This method showed as good an effect as chemical methods in shortening the long oil chains, which is the most critical problem in biodiesel production. It has been seen that the process has a fast and high application potential because it provides the formation of shorter-chain fatty acids and fatty acid methyl esters with high efficiency and does not include the removal of auxiliary chemicals.