Research Progress of Niobium-Based Catalysts in the Depolymerization of Lignin

Abstract

With the exhaustion of energy resources and environmental pollution, it is a need to find renewable resources to provide the energy and materials needed for production and living. Lignin is a large renewable resource that can provide aromatic rings in nature. It is an important part of biomass and it also has great economic value. Lignin is a three-dimensional polymer compound composed of phenylpropane structural units linked by C-C and C-O bonds. Because of the structur-*