Performance Analysis of a Multi-Generation System Integrating Waste Plasma Gasification, Tire Pyrolysis, and Water Electrolysis

To enhance the processing capacity of solid waste and achieve diversified utilization, an innovative integrated system based on Refuse-Derived Fuel (RDF) plasma gasification, water electrolysis for hydrogen production, and coupled tire pyrolysis for the synthesis of methanol and oil has been proposed. The system is primarily centered on a plasma gasifier, which drives the tire pyrolysis subsystem, thereby enabling a cascading utilization of energy. It is determined that the system achieves an energy efficiency of 57.20% and a thermal efficiency of 62.76%. The main source of energy loss was identified in the methanol synthesis process, while significant thermal losses were observed in the plasma gasification stage. According to economic analysis, the total investment required for the system amounts to 4 906 740 USD. With an operational lifespan projected at 25 years and a payback period of 3.04 years, the system’s final Net Present Value (NPV) is estimated to reach 35 394 760 USD. This integrated approach not only improves resource efficiency but also provides a viable economic model for waste-to-energy conversion technologies.