Heterogeneous catalytic oxidation of lignin into value-added chemicals

Of late there is significant interest in establishing biorefineries for total utilization of lignocellulosic biomass components to produce energy, chemicals and value-added products. Lignin is an abundant and yet underutilized constituent of lignocellulosic biomass that accounts for up to 40% of the energy content. Among several approaches towards value addition of lignin, catalytic oxidation appears to be promising. Hence, the purpose of this report is to provide background information on catalytic oxidation and to update the reader about current research on heterogeneous catalytic oxidation of lignin into value-added products. Additionally, some thoughts are presented to stimulate discussion on lignin oxidation.