Nanostructured materials Batch reactors Catalysts Chromium compounds Fatty acid methyl ester Fatty acids Heterogeneous catalyst Molar ratio Aromatic compounds Average particle size Binary alloys Biodiesel Biodiesel production Biological techniques Calcium compounds Catalyst activity Catalyst loadings Catalytic esterification Chromium alloys Dispersions Electron-relay effect Esterification Esters Literature survey Metal nanoparticles Methanol Methylene blue dye Mixed oxide catalysts Mixed oxides catalysts Palm fatty acid distillate