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Waste cooking oil is a potential alternative of refined vegetable oil for biodiesel production due to its low cost and elimination of its disposal problem. The concentration of free fatty acids (FFAs) in WCO dictates the type of chemical treatment required for biodiesel production: a single esterification reaction is considered at high content of FFAs, whereas, a combination of estrification and transestrification...
The transesterification reaction of beef tallow to biodiesel using Cs2O/γ-Al2O3 as a solid base catalyst was studied. Response surface methodology and central composite rotation design were employed to optimize the reaction conditions. The optimum conditions giving 95.5% biodiesel yield were: reaction time 120 min, temperature 66°C, catalyst amount 5.3% (based on the weight of oil), molar ratio of...
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