Biodiesel production from rice bran oil fatty acid distillate via supercritical hydrolysis–esterification–transesterification in a microreactor
Issued Date
2023-12-01
Resource Type
eISSN
23524847
Scopus ID
2-s2.0-85153945359
Journal Title
Energy Reports
Volume
9
Start Page
5299
End Page
5305
Rights Holder(s)
SCOPUS
Bibliographic Citation
Energy Reports Vol.9 (2023) , 5299-5305
Suggested Citation
Akkarawatkhoosith N., Bangjang T., Kaewchada A., Jaree A. Biodiesel production from rice bran oil fatty acid distillate via supercritical hydrolysis–esterification–transesterification in a microreactor. Energy Reports Vol.9 (2023) , 5299-5305. 5305. doi:10.1016/j.egyr.2023.04.348 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/81330
Title
Biodiesel production from rice bran oil fatty acid distillate via supercritical hydrolysis–esterification–transesterification in a microreactor
Author(s)
Author's Affiliation
Other Contributor(s)
Abstract
Rice bran oil fatty acid distillate (RBOFAD), a by-product from rice bran oil production, was used as feedstock for the production of biodiesel. The hydrolysis–esterification–transesterification of RBOFAD with ethanol was performed in a microreactor under supercritical conditions. The biodiesel product in the form of fatty acid ethyl ester (FAEE) was obtained. The operating conditions, including the sulfuric acid content (0.2–0.6%), water content (0–7.5%), ethanol-to-oil molar ratio (5:1–16:1), and reaction temperature (260–320 °C), were optimized. The water content could affect the reaction system via both hydrolysis of triglycerides and reverse esterification of fatty acids. Biodiesel with the FAEE content of 93% was obtained at the optimal conditions (sulfuric acid content of 0.4%, water content of 2.5%, ethanol-to-oil molar ratio of 7:1, residence time of 19 min, and reaction temperature of 280 °C). The properties of the biodiesel, including density, viscosity, acidity, oxidation stability, freezing point, and pour point, were compared with standards. The properties such as viscosity, acid value, heating value, and oxidation stability were suitable as biodiesel according to EN14213, except for the contents of ester, monoglyceride, and diglyceride.
