Physicochemical characterizations of microalgal methyl esters extracted with hexane and refined by vacuum distillation at different temperatures
作者： Weijuan Yang , Yi Qiu , Jun Cheng , Rui Huang , Rui Huang
DOI: 10.1016/J.FUEL.2021.120779
关键词: Chemistry 、 Boiling point 、 Fourier transform infrared spectroscopy 、 Biodiesel 、 Thermogravimetric analysis 、 Fatty acid methyl ester 、 Vacuum distillation 、 Organic chemistry 、 Hexane 、 Transesterification
摘要: Abstract To prepare quality biodiesel from microalgal lipids in pilot-scale reactors, methyl esters cells were extracted with hexane after direct transesterification and then refined by vacuum distillation. The comprehensively characterized via gas chromatography–mass spectrometry, Fourier transform infrared spectroscopy, nuclear magnetic resonance, thermogravimetric analysis. ester at 255 °C–259 °C was found to be the ideal fuel a high fatty acid content of 94.6%, low combustion activation energy 42.1 kJ/mol, proper carbon-chain length distributed C14–C18. Impurities hexane, such as alkanes short-chain esters, separated 105 °C–254 °C owing their polarity molecular weight. Highly unsaturated long collected 260 °C–280 °C boiling point. Separation alkanes, highly through distillation effectively improved properties enhanced economic feasibility lipids.
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