General Information
    • ISSN: 2010-0221 (Print)
    • Abbreviated Title: Int. J. Chem. Eng. Appl.
    • Frequency: Quarterly
    • DOI: 10.18178/IJCEA
    • Editor-in-Chief: Prof. Dr. Shen-Ming Chen
    • Executive Editor: Jennifer X. Zeng
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Editor-in-chief
Prof. Dr. Shen-Ming Chen
National Taipei University of Technology, Taiwan
 

IJCEA 2020 Vol.11(2): 48-52 ISSN: 2010-0221
doi: 10.18178/ijcea.2020.11.2.778

High Intensity Ultrasound Assisted Transesterification of Espresso Coffee Oil Methyl Ester: Optimization through Response Surface Methodology Approach

Krit Somnuk, Pichai Eawlex, Jarernporn Thawornprasert, and Gumpon Prateepchaikul
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).

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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.

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