PRELIMINARY EXPERIMENTAL EVALUATION AND PROCESS CHALLENGES IN APPLYING ACTIVATED CARBON, ZIF-67, AND AC/ZIF-67 COMPOSITE CATALYSTS FOR BIODIESEL PRODUCTION. unita [Internet]. 2025 Dec. 25 [cited 2026 Jan. 10];7:887-91. Available from: https://conference.unita.ac.id/index.php/conference/article/view/584