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| Kinetics of glycerol esterification reaction |
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| KeyWord:glycerol esterification reaction kinetics biodiesel model prediction |
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| Abstract: |
| Glycerol esterification is an effective method to reduce the acid value of acidic oil, which can be used for biodiesel production. A mixture of soybean oil and oleic acid was used as the model compound. The effect of reaction temperature on glycerol esterified product distribution was examined. Kinetic parameters, including reaction rate constant k and activation energy Ea, of all the reactions involved in glycerol esterification process were determined using the second-order reaction kinetics model. The effects of reaction temperature, molar ratio of glycerol to free fatty acid, and acid value of feedstock on acid value reduction were predicted based on the model. The results showed that the model values were in good agreement with the experimental values. The reduction of acid value was highly dependent on the reaction temperature. The higher acid value reduction rate and lower final acid value were observed at higher reaction temperature, higher molar ratio of glycerol to free fatty acid and higher initial acid value of feedstock. The research results were helpful to reveal the mechanism of glycerol esterification reaction and design of glycerol esterification reactor. |
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