Research progress on non-precious metal-catalyzed hydrogenation and deoxygenation of biomass to produce hydrocarbon-based biofuels
Alkyl-based bio-liquid fuels play an important role in biomass applications.The first generation of biodiesel(fatty acid methyl ester)has high oxygen content,low calorific value,and limited mixing ratio with fossil fuels,so the second generation of hydrocarbon-based biodiesel,which is mainly prepared by thermal catalytic hydrogenation and deoxygenation isomerization process,has attracted much attention,and the study of catalysts is crucial.The composition of catalysts mainly includes metal active components and earriers.Due to the high cost of precious metal catalysts,they are not easily applied on a large scale in industrial production.Therefore,in the production and research of second-generation hydrocarbon-based biodiesel,emphasis is placed on developing non-precious metal catalysts with high conversion rates,high selectivity,good stability,and low cost.This paper expounds on the catalytic hydrogenation and deoxygenation process,focusing on the catalytic activity,catalytic conversion mechanism,catalyst deactivation reasons,and other catalytic characteristics of non-precious metal(Ni,Mo,W,Co,etc.)catalysts in the preparation of hydrocarbon fuels from biomass.At the same time,prospects for future research on non-precious metal catalysts in oil and fat hydrogenation and deoxygenation catalysis are proposed.
alkyl biodieselhydrodeoxygenationnon-precious metal catalystscatalytic mechanismphotothermal catalysis
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