| Issue |
E3S Web Conf.
Volume 638, 2025
International Conference on Electronics, Engineering Physics and Earth Science (EEPES 2025)
|
|
|---|---|---|
| Article Number | 01004 | |
| Number of page(s) | 6 | |
| Section | Energy Efficiency and Applied Thermodynamics | |
| DOI | https://doi.org/10.1051/e3sconf/202563801004 | |
| Published online | 16 July 2025 | |
Spent coffee grounds to biodiesel: Opportunities, challenges, and insights from an experimental study
1 Democritus University of Thrace, Department of Chemistry, School of Sciences, Ag. Loukas, 65404 Kavala, Greece
2 Democritus University of Thrace, Petroleum Institute, Ag. Loukas, 65404 Kavala, Greece
3 Democritus University of Thrace, Hephaestus Laboratory, Ag. Loukas, 65404 Kavala, Greece
* Corresponding author: nikokkinos@mwpc.gr
Spent coffee grounds (SCG) represent an attractive and sustainable feedstock for biofuel production due to their high lipid content and abundance as a waste product. This study examines the step-by-step production of biodiesel from espresso SCG, focusing on several opportunities and challenges associated with each conversion step. The results indicated that oil degumming and neutralization, prior to alkali- catalyzed transesterification, were promising compared to acid-catalyzed esterification, which was deemed insufficient. Under the selected conditions, 70.16% of biodiesel yield was obtained. These findings underscore the feasibility of utilizing SCG as a renewable resource for biodiesel synthesis.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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