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In this study, 40 % CaO/γ‐Al2O3 catalyst was used for biodiesel production from corn oil. A transesterification reaction was done for 5 h at a temperature of 65 °C in the presence of corn oil, methanol (methanol to oil molar ratio of 12:1), and CaO/γ‐Al2O3 catalyst (0.06 g/g (6 wt%)). Catalyst used in this study was synthesized using the sol‐gel method. In this method, two parameters of gelation temperature...