CALCINED EGGSHELL – DOPED BIOCHAR AS CATALYST FOR BIODIESEL PRODUCTION FROM WASTE COOKING OIL: A PROCESS OPTIMIZATION STUDY. TNAMP [Internet]. 2024 Mar. 1 [cited 2024 Sep. 29];20:93-102. Available from: https://nampjournals.org.ng/index.php/tnamp/article/view/384