Optimization of the esterification reaction of free fatty acids present in waste salmon oil

Abstract Biodiesel is gaining importance as a substitute for diesel with special focus on the transportation sector due to its advantages over petroleum‐based alternatives. Waste fish oil was used feedstock this study, and an acid pre‐esterification process examined. The effects of three main variables biodiesel yield were studied their combined investigated. Temperature, molar ratio, catalysts varied remaining parameters kept constant. A quadratic model found fit experimental data best, regression coefficient 0.82. An increase in reaction temperature led yield. However, became considerably weaker after 323 K. reactant ratio amount had similar tendency within domain under consideration – product increased all operational conditions evaluated. It that optimal predict 96.29% 325.53 K, 8.37, 3.93 wt% catalyst. © 2022 Authors. Biofuels, Bioproducts Biorefining published by Society Industrial Chemistry John Wiley & Sons Ltd.