Publication: Non-catalytic and glycerol-free biodiesel production from rice bran oil fatty acid distillate in a microreactor
5
Issued Date
2021-09-01
Resource Type
ISSN
25901745
Other identifier(s)
2-s2.0-85111672194
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Energy Conversion and Management: X. Vol.11, (2021)
Suggested Citation
Nattee Akkarawatkhoosith, Tiprawee Tongtummachat, Amaraporn Kaewchada, Attasak Jaree Non-catalytic and glycerol-free biodiesel production from rice bran oil fatty acid distillate in a microreactor. Energy Conversion and Management: X. Vol.11, (2021). doi:10.1016/j.ecmx.2021.100096 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/76899
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Non-catalytic and glycerol-free biodiesel production from rice bran oil fatty acid distillate in a microreactor
Other Contributor(s)
Abstract
Obtained from rice bran oil refining process, rice bran oil fatty acid distillate (RBOFAD) is a low-value, non-edible, and unwanted by-product, which can be used as a promising alternative raw material for biodiesel production. However, the conventional biodiesel process cannot handle this material due to the high content of free fatty acid (FFA). A novel supercritical process for biodiesel synthesis using dimethyl carbonate (DMC) as acyl acceptor in a microreactor was proposed in this work for the raw material with high FFA. High quality of biodiesel and value-added by-product (glyoxal) were obtained in our process. In this process, the biodiesel content of 80.9% was achieved for the case of RBOFAD as feedstock, compared to only 43.6% for the case of refined rice bran oil as feedstock. The influence of operating conditions on biodiesel and glyoxal content including reaction temperature, residence time, and DMC-to-RBOFAD molar ratio was investigated and optimized via response surface methodology. The biodiesel content of 97.1% was achieved at the optimal conditions (reaction temperature of 360 °C, residence time of 35 min, and RBOFAD-to-oil molar ratio of 11:1). The required pressure and the amount of DMC were significantly reduced compared to other processes. Most of the biodiesel properties met the international standards except for some impurities (mono- and diglycerides). These results provided the new insight for the development of biodiesel production from low-grade feedstocks.