Sugarcane Bagasse Biochar as a Solid Catalyst: From Literature Review of Heterogeneous Catalysts for Esterifications to the Experiments for Biodiesel Synthesis from Palm Oil Industry Waste Residue. Indonesian J. Sci. Technol [Internet]. 2023 Nov. 28 [cited 2025 Sep. 27];6(2):337-52. Available from: https://ejournal.kjpupi.id/index.php/ijost/article/view/71