Chaichana, E. , Saowapark, T. , Sukrat, K. , Khanthong, C. , Pathomnithipinyo, T. and Jaturapiree, A. 2024. Biodiesel Production from Used Oils with Char Based Catalyst from Pomelo Peel Impregnated with KOH as a Catalyst . Journal of Advanced Development in Engineering and Science. 14, 39 (Apr. 2024), 31–45.