Reductive or oxidative catalytic lignin depolymerization: An overview of recent advances

Lignin, one of the main biopolymers in lignocellulosic biomass, is a promising feedstock for producing aromatic chemicals and BTX-fuels. Despite high availability, lignin remains under-valorized to chemical formation motivating research towards upgrading through depolymerization. Catalytic approaches are particularly studied since they can influence selectivity Next thermal or acid/base depolymerization, catalytic routes under either oxidative reductive atmosphere represent very attractive way produce aromatics fine chemistry energy. This literature overview shows that depolymerization outcome depends strongly on reaction conditions. While highly functionalized high-added value like vanillin obtained, alkylphenolics BTX mainly observed when conducting atmosphere. Additionally, results depend nature catalyst former approach, whereas conditions play an essential role operating hydrogen. Understanding comparing these quite complex methodologies over last ten years constitutes focus this review.