TY  - GEN
TI  - Waste cooking oil valorisation into biodiesel using supercritical methanolysis: Critical assessment on the effect of water content
Y1  - 2019/05/30/
AV  - public
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
N2  - In this work, valorisation of high acid value waste cooking oil (WCO) into biodiesel has been assessed using
supercritical methanolysis. The effect of the water content in the feedstock has been critically investigated. Using supercritical
methanolysis, the higher water content in the feedstock enhanced the hydrolysis of triglycerides to free fatty acids (FFAs) and
the esterification of FFAs into fatty acid methyl esters (FAMEs) has been reported. The effect of water content has been
investigated by adding different volumes of water to the feedstock prior to the reaction. Response Surface Methodology (RSM)
using Central Composite Design (CCD) has been used to design the experiments and to optimise the experimental variables.
Five controllable reaction parameters have been studied including methanol to oil (M:O) molar ratio, reaction temperature,
reaction pressure, reaction time and water content. Biodiesel yield has been chosen as reaction response for the experimental
runs. The linear effect of reaction parameters and their interactions on biodiesel yield has been analysed. It has been observed
that increasing the water content of the feedstock decreases the yield of biodiesel at specific conditions. However, due to the
high interactive effect between water content and reaction time, it has been observed increasing effect at longer reaction time.
A quadratic model has been developed using the reported experimental results representing biodiesel yield function in all of
the experimental parameters. The adequacy of the predicted model has been checked statistically using analysis of variance
(ANOVA). Numerical optimisation has been applied to identify the optimal reaction conditions for maximum production of
biodiesel. The developed optimal condition has reported 99.8% biodiesel yield at 10:1 M:O molar ratio, 245 oC, 125 bar,
6 vol% of water content within 19 min.
ID  - discovery10150864
PB  - EUBCE (European Biomass Conference and Exhibition)
UR  - http://www.etaflorence.it/proceedings/
CY  - Lisbon, Portugal
A1  - Umar, Yusuf
A1  - Aboelazayem, Omar
A1  - Echresh, Zahra
A1  - Gadalla, Mamdouh
A1  - Saha, Basudeb
T3  - European Biomass Conference and Exhibition
KW  - Biodiesel
KW  -  Organic waste
KW  -  Modelling
KW  -  Transesterification
KW  -  Esterification
ER  -