HELWANI, Z.; AMRAINI, S. Z.; ASMURA, J.; OTHMAN, M. R.; PELICIAMANUELA, S.; ANGGRIANI, R. D. Eco-Friendly Approach to Palm Oil Biodiesel Production: Torrefied Palm Frond Carbon as a Source for CaO/C/NaOH Catalysts. Leuser Journal of Environmental Studies, [S. l.], v. 2, n. 1, p. 12–18, 2024. DOI: 10.60084/ljes.v2i1.171. Disponível em: https://heca-analitika.com/ljes/article/view/171. Acesso em: 21 apr. 2026.