Biodiesel from fish waste oil: synthesis via supercritical methanol and thermodynamic optimization

Abstract This study evaluates the potential of local fish waste oil as a feedstock for biodiesel via supercritical methanol transesterification (SCMT). Hexane was used cosolvent and reaction carried out in continuous reactor under conditions. The response surface methodology (RSM) method applied to analyse effect four independent variables, including weight ratio fish-waste (W), temperature (T), pressure (P) feed flow rate (F), on yield production methanol. According calculated optimal operating condition RSM, values W (22.3 oil), T (270°C), P (112.7 bar) F (2.0 mL min–1) were achieved. Under optimum conditions, highest estimated be 94.6% (g/g). obtained found close theoretical (95.2%). value suggests that proposed strategy has promising fuel.