Binary alloys 2 Chromium alloys 2 Chromium compounds 2 Fatty acid methyl ester 2 Fatty acids 2 Heterogeneous catalyst 2 Mixed oxides catalysts Sol-gel process 2 Sol-gels 2 Titanium alloys 2 Titanium oxides 2 Alternative source 1 Batch data processing 1 Batch process 1 Batch reactors 1 Bio-diesel fuel 1 Biodiesel 1 Catalyst activity 1 Catalyst synthesis 1 Catalysts 1 Catalytic esterification 1 Cooking palm oil 1 Esterification 1 Esters 1 Metals 1 Methanol 1 Molar ratio 1 Nanostructured materials 1 Palm fatty acid distillate 1 Palm oil 1