Catalytic and Non-Catalytic Co-Gasification of Biomass and Plastic Wastes for Energy Production

Abstract

The management of solid waste and the supply of energy are two of the most importantenvironmental problems of our time. Projections indicate that by 2050, the global demandfor electrical energy is expected to increase by 35% and the amount of solid waste generated to increase by 45%. In this context, polymeric waste materials such as biomass andplastics can be valorised through thermochemical processes for the generation of energy.Gasification, which converts carbonaceous materials into syngas, tar, and char, is one ofthe most promising recycling technologies. The composition and relative quantities of theproducts are influenced by the process configuration, operating parameters, and the typeof fuel used. Tar removal is facilitated by adding specific catalysts to the process. Theco-processing of biomass and plastics in the gasification process, called co-gasification,improves the gas yield and reduces solid residues. This review evaluates catalytic andnon-catalytic co-gasification of biomass waste and non-biodegradable plastics, with a focuson syngas production and its energy potential.