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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) In EUBCE 2017 Online Conference Proceedings p.1381-1387
Abstract
In this study, low quality waste cooking oil (WCO) with high total acid value has been used for biodiesel production. The main factors affecting the reaction have 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 to evaluate the significance of the predicted model. Numerical optimisation predicted the optimum conditions for maximum conversion of FFA at methanol to oil (M:O) molar ratio, temperature, pressure and time of 35:1, 260 °C, 110 bar and 16 min, respectively for 98 % conversion. The predicted optimum conditions have been validated experimentally... (More)
In this study, low quality waste cooking oil (WCO) with high total acid value has been used for biodiesel production. The main factors affecting the reaction have 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 to evaluate the significance of the predicted model. Numerical optimisation predicted the optimum conditions for maximum conversion of FFA at methanol to oil (M:O) molar ratio, temperature, pressure and time of 35:1, 260 °C, 110 bar and 16 min, 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 of 0.00103 s-1, activation energy of 34.5 kJ/mol and Arrhenius constant of 1.26 s-1. Finally, a kinetic reactor has been simulated resulting in 97 % conversion of FFA with 0.716 % relative error from the experimental results. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
EUBCE 2017 Online Conference Proceedings
pages
7 pages
publisher
ETA-Florence Renewable Energies
conference name
25th European Biomass Conference and Exhibition (EUBCE)
ISBN
978-88-89407-17-2
DOI
10.5071/25thEUBCE2017-3CV.1.53
language
English
LU publication?
yes
id
75580d8a-784f-4d67-8474-e61a240aa8d6
date added to LUP
2017-08-11 10:29:27
date last changed
2017-11-14 09:54:06
@inproceedings{75580d8a-784f-4d67-8474-e61a240aa8d6,
  abstract     = {In this study, low quality waste cooking oil (WCO) with high total acid value has been used for biodiesel production. The main factors affecting the reaction have 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 to evaluate the significance of the predicted model. Numerical optimisation predicted the optimum conditions for maximum conversion of FFA at methanol to oil (M:O) molar ratio, temperature, pressure and time of 35:1, 260 °C, 110 bar and 16 min, 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 of 0.00103 s-1, activation energy of 34.5 kJ/mol and Arrhenius constant of 1.26 s-1. Finally, a kinetic reactor 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},
  booktitle    = {EUBCE 2017 Online Conference Proceedings},
  isbn         = { 978-88-89407-17-2 },
  language     = {eng},
  pages        = {1381--1387},
  publisher    = {ETA-Florence Renewable Energies},
  title        = {Biodiesel Production from High Acid Value Waste Cooking Oil Using Supercritical Methanol: Esterification Kinetics of Free Fatty Acids},
  url          = {http://dx.doi.org/10.5071/25thEUBCE2017-3CV.1.53},
  year         = {2017},
}