| Yazarlar (11) |
Ramiz Rafil Al-Samaraae
Middle Technical University, Iraq |
|
Abdulaziz Atabani
Erciyes Üniversitesi, Turkey |
|
Ismail Bogrekci
Aydin Adnan Menderes University, Turkey |
Doç. Dr. Muhammed Raşit ATELGE
Kastamonu Üniversitesi, Türkiye |
|
Tülin Avcı Hansu
Siirt Üniversitesi, Türkiye |
|
Mustafa Kaya
Siirt Üniversitesi, Türkiye |
|
Hilal Demir Kıvrak
Eskişehir Osmangazi Üniversitesi, Turkey |
|
Yalçın Şevki Yıldız
Erciyes Üniversitesi, Turkey |
|
Selahaddin Orhan Akansu
Erciyes Üniversitesi, Turkey |
|
Sebahattin Ünalan
Erciyes Üniversitesi, Turkey |
|
Pinar Demircioglu
Aydin Adnan Menderes University, Turkey |
| 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 |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale |
| Dergi Adı | Biofuels |
| Dergi ISSN | 1759-7269 Wos Dergi Scopus Dergi |
| Dergi Grubu | Q3 |
| Makale Dili | İngilizce |
| Basım Tarihi | 01-2025 |
| Sayı | 1 |
| Doi Numarası | 10.1080/17597269.2025.2487732 |
| Atıf Sayıları |
