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Biodiesel production from high acid value waste cooking oil using supercritical methanol: Esterification kinetics of free fatty acids

Aboelazayem, Omar; Abdelaziz, Omar LU ; Gadalla, Mamdouh ; Hulteberg, Christian LU and Saha, Basudeb (2017) 25th European Biomass Conference and Exhibition (EUBCE)
Abstract
In this study, low quality waste cooking oil with high total acid value, has been used for biodiesel production. The main factors affecting the reaction has been analysed using Response Surface Methodology (RSM). A quadratic model representing the interrelationships between reaction variables and free fatty acids (FFA) conversion has been developed. Analysis of variance (ANOVA) has been used for checking the significance of the predicted model. Numerical optimisation concluded the optimum conditions for maximum conversion of FFA at methanol to oil (M:O) molar ratio, temperature, pressure and time of 35:1, 260oC, 110 bar and 16 minutes, respectively for 98% conversion. The predicted optimum conditions have been validated experimentally... (More)
In this study, low quality waste cooking oil with high total acid value, has been used for biodiesel production. The main factors affecting the reaction has been analysed using Response Surface Methodology (RSM). A quadratic model representing the interrelationships between reaction variables and free fatty acids (FFA) conversion has been developed. Analysis of variance (ANOVA) has been used for checking the significance of the predicted model. Numerical optimisation concluded the optimum conditions for maximum conversion of FFA at methanol to oil (M:O) molar ratio, temperature, pressure and time of 35:1, 260oC, 110 bar and 16 minutes, respectively for 98% conversion. The predicted optimum conditions have been validated experimentally resulting in 97.7% conversion of FFA with 0.3% relative error. Kinetic and thermodynamic data of the esterification reaction has been studied resulting in pseudo first order reaction with reaction rate constant (k) of 0.00103 s-1, activation energy of 34.5 kJ/mol and Arrhenius constant of 1.26 s-1. Finally, a kinetic reaction has been simulated resulting in 97% conversion of FFA with 0.716% relative error from the experimental results. (Less)
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published
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conference name
25th European Biomass Conference and Exhibition (EUBCE)
language
English
LU publication?
yes
id
7c210b27-d0f3-415d-af65-f080203e35cc
alternative location
http://programme.eubce.com/abstract.php?idabs=14610&idses=593&idtopic=15
date added to LUP
2017-07-04 17:00:03
date last changed
2017-08-24 16:45:58
@misc{7c210b27-d0f3-415d-af65-f080203e35cc,
  abstract     = {In this study, low quality waste cooking oil with high total acid value, has been used for biodiesel production. The main factors affecting the reaction has been analysed using Response Surface Methodology (RSM). A quadratic model representing the interrelationships between reaction variables and free fatty acids (FFA) conversion has been developed. Analysis of variance (ANOVA) has been used for checking the significance of the predicted model. Numerical optimisation concluded the optimum conditions for maximum conversion of FFA at methanol to oil (M:O) molar ratio, temperature, pressure and time of 35:1, 260oC, 110 bar and 16 minutes, respectively for 98% conversion. The predicted optimum conditions have been validated experimentally resulting in 97.7% conversion of FFA with 0.3% relative error. Kinetic and thermodynamic data of the esterification reaction has been studied resulting in pseudo first order reaction with reaction rate constant (k) of 0.00103 s-1, activation energy of 34.5 kJ/mol and Arrhenius constant of 1.26 s-1. Finally, a kinetic reaction has been simulated resulting in 97% conversion of FFA with 0.716% relative error from the experimental results.},
  author       = {Aboelazayem, Omar and Abdelaziz, Omar and Gadalla, Mamdouh  and Hulteberg, Christian and Saha, Basudeb},
  language     = {eng},
  title        = {Biodiesel production from high acid value waste cooking oil using supercritical methanol: Esterification kinetics of free fatty acids},
  year         = {2017},
}