Effect of calcination temperature on biodiesel production from palm kernel oil using a bifunctional catalyst derived from calcium carbide residue (CCR) and anthill clay (AC). International Journal of Latest Technology in Engineering Management & Applied Science, [S. l.], v. 15, n. 5, p. 2952–2965, 2026. DOI: 10.51583/IJLTEMAS.2026.150500239. Disponível em: https://www.ijltemas.in/submission/online/article/view/5009.. Acesso em: 15 jul. 2026.