Factors influencing product selectivity in hydrodeoxygenation of lignin model compounds
Lignin is one of the main components of biomass and can be converted into renewable fuels and chemicals by catalytic hydrodeoxygenation.Extensive fundamental research has been conducted based on lignin model compounds and heterogeneous catalytic systems.However,the hydrodeoxygenation of lignin model compounds with high selectivity remains a significant challenge due to their intricate molecular structures,which are featured with hydroxyl and methoxyl groups connected to the phenyl ring,leading to diverse reaction pathways.In this paper,the factors affecting the selectivity of the product were reviewed comprehensively.First,the reaction mechanisms and pathways involved in the hydrodeoxygenation of lignin model compounds were stated.Next,the factors influencing the selectivity of the products were summarized from two aspects.One aspect is focused on the hydrodeoxygenation catalysts,including catalyst components,promoters,supports,and preparation methods;the other is associated with the reaction conditions,including reaction temperature,hydrogen pressure,time,and solvents.
ligninhydrodeoxygenationproduct selectivitycatalystreaction process
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