Fatima Garba Yusuf, Fatima Abubakar Muhammad and Abubakar Abubakar Ibrahim 2025. Transesterification of Soybean Acid Oil with Al2O3 Catalyst: Effects of Catalyst Concentration and Reaction Time on Biodiesel Yield and Quality . Journal of Energy Technology and Environment. 7, 1 (Mar. 2025), 1–13. DOI:https://doi.org/10.5281/zenodo.15007489.