Abstract
Lignocellulosic biomass offers a unique resource for the sustainable production of bio-derived chemicals and fuels in replacement of the fossil products. Lignin, a major component of biomass is largely underexploited, mainly due to its recalcitrant molecular structure which hinders the development of depolymerization techniques. Considering its rich phenolic functionalities in lignin, catalytic transformations can render lignin a viable source of value-added chemicals. The present contribution aims to highlight the emerging heterogeneous depolymerization strategies, challenges and economic viability aspects of pyrolysis, reduction and oxidation processes.