A new renewable energy based integrated gasification system for hydrogen production from plastic wastes

A multigenerational waste to energy system is developed to produce hydrogen, electricity, heating, domestic hot water, and fresh water. The proposed system utilizes plastic wastes gasification to produce syngas that is pro-cessed through multiple sub-systems. Energy and exergy analyses are comprehensively performed to study the overall system and identify the overall system energy and exergy efficiencies. The system is designed to utilize geothermal energy to produce steam required for plastic wastes gasification. The syngas produced by the gasi-fication of plastic waste is processed in a combined cycle to generate power. The current system produces power at a capacity of 73,550 kW. The created syngas is fed into a reforming plant, which produces hydrogen at a rate of 1.05 kg/s. A reverse osmosis water desalination sub-system is also added to produce fresh water at a rate of 12 kg/s. The developed system energy efficiency and exergy efficiency for the reference case are 66.24% and 48.10%, respectively.