Abstract—High intensity ultrasound was used to accelerate
the ester conversion of biodiesel production from espresso
coffee oil (ECO) with a base-catalyzed transesterification. The
ester conversion from ECO biodiesel production was optimized
through three parameters: methanol, potassium hydroxide, and
ultrasonic reaction time with a response surface methodology
(RSM). After ECO has gone through the ultrasonic
homogenizer (1000W ultrasonic power, 18 kHz ultrasonic
frequency) for the biodiesel production. The maximum methyl
ester of 96.385 wt.% was achieved under an optimal condition:
30.8 vol.% methanol, 16.6 gKOH/L, and 72 sec ultrasonic
reaction time.
Index Terms—Coffee oil, high intensity ultrasound, biodiesel,
methyl ester, response surface methodology.
The authors are with the Department of Mechanical Engineering, Faculty
of Engineering, Prince of Songkla University, Hat Yai, Songkhla, Thailand
(e-mail: krit.s@psu.ac.th, pichai.eawlex@gmail.com,
thawornprasert.j@gmail.com, gumpon.p@psu.ac.th).
[PDF]
Cite: Krit Somnuk, Pichai Eawlex, Jarernporn Thawornprasert, and Gumpon Prateepchaikul, "High Intensity Ultrasound Assisted Transesterification of Espresso Coffee Oil Methyl Ester: Optimization through Response Surface Methodology Approach," International Journal of Chemical Engineering
and Applications vol. 11, no. 2, pp. 48-52, 2020.
