Valorization of spent coffee grounds: a multi-solvent extraction approach and blending with waste cooking oil for sustainable biodiesel production
Yazarlar (11)
Ramiz Rafil Al-Samaraae
Middle Technical University, Irak
Middle Technical University, Irak
Abdulaziz Atabani
Erciyes Üniversitesi, Türkiye
Erciyes Üniversitesi, Türkiye
Prof. Dr. Ismail Bogrekci Aydin Adnan Menderes University, Türkiye
Doç. Dr. Muhammed Raşit ATELGE Kastamonu Üniversitesi, Türkiye
Doç. Dr. Tülin Avcı Hansu Siirt Üniversitesi, Türkiye
Prof. Dr. Mustafa Kaya Siirt Üniversitesi, Türkiye
Prof. Dr. Hilal Demir Kıvrak Eskişehir Osmangazi Üniversitesi, Türkiye
Prof. Dr. Yalçın Şevki Yıldız Erciyes Üniversitesi, Türkiye
Prof. Dr. Selahaddin Orhan Akansu Erciyes Üniversitesi, Türkiye
Prof. Dr. Sebahattin Ünalan Erciyes Üniversitesi, Türkiye
Prof. Dr. Pinar Demircioglu Aydin Adnan Menderes University, Türkiye
| Makale Türü | Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale) | ||
| Dergi Adı | Biofuels (Q3) | ||
| Dergi ISSN | 1759-7269 Wos Dergi Scopus Dergi | ||
| Dergi Tarandığı Indeksler | SCI-Expanded | ||
| Makale Dili | İngilizce | Basım Tarihi | 04-2025 |
| Cilt / Sayı / Sayfa | 16 / 10 / 1083–1104 | DOI | 10.1080/17597269.2025.2487732 |
| Makale Linki | https://doi.org/10.1080/17597269.2025.2487732 | ||
| UAK Araştırma Alanları |
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| Özet |
| A worldwide waste stream, spent coffee grounds (SCG), presents serious environmental challenges because of landfill disposal and methane emissions. In this work, the valorization of SCG through oil extraction and biodiesel synthesis has been investigated. Hexane, a non-polar solvent, achieved the highest spent coffee grounds oil (SCGO) yield of 18.73 ± 2.31% (dry weight basis). Non-polar solvents usually produce lower free fatty acid (FFA) content than polar solvents. For instance, hexane extracted SCGO with an acid value of 7.85 mg KOH/g, much below ethanol (16.20 mg KOH/g). The direct alkaline transesterification via blending SCGO with low FFA WCO is a creative way to lower the FFA of SCGO. This reduced production costs, energy requirement and catalyst consumption as it eliminates the need for the 2-step esterification-transesterification process. A biodiesel yield of 99% was achieved with 90%WCO:10%SCGO blend. The biodiesel quality was validated via GC-MS, FT-IR, NMR and TGA analyses. Results indicated that SCGO is a promising biodiesel feedstock when blending with WCO. This helps make the economy more sustainable and circular by reducing reliance on fossil fuels and waste generation. This study falls well within the UN Sustainable Development Goals (SDGs) such as Affordable and Clean Energy (SDG7) and Climate Action (SDG13). |
| Anahtar Kelimeler |
| oil extraction | physical and chemical properties | polar and non-polar solvents | Spent coffee grounds | valorization of waste |
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| Web of Science | 1 |
| Scopus | 1 |