Catalysts 4 Esterification 4 Palm oil 4 Transesterification 4 Biomass 3 CONVERSION 3 Carbon 3 Chemical engineering 3 Esters 3 Fatty acid methyl ester 3 PYROLYSIS 3 TJ Mechanical engineering and machinery 3 Aquilaria 2 BIODIESEL PRODUCTION 2 Biocatalysis 2 Biodiesel 2 Bioenergy 2 CATALYST 2 CO2 reduction 2 Carbohydrate-derived solid acid catalyst 2 Catalyst activity 2 Catalytic cracking 2 Degradation 2 Energy conservation 2 Enzyme Activity 2 Epoxidation 2 Ethyl levulinate 2 Fatty acids 2 Fourier transform infrared spectroscopy 2 Gallic acid 2