Simulation of thermodynamic systems in calcium-based chemical looping gasification of municipal solid waste for hydrogen-rich syngas production

This study explores calcium-based chemical looping gasification (CLG) as a method for managing municipal solid waste (MSW), with a focus on converting MSW into hydrogen-rich syngas. The innovative CS-MgO-ZrO 2 calcium-based sorbent has been identified as optimal, facilitating fluidization crucial for operational stability and economic feasibility. Key discoveries include heightened H 2 concentration and CO 2 capture efficiency under specific operational parameters (4000 kg/h solid flow rate, 6000 kg/h steam flow rate), despite diminished H 2 production at carbon conversion rates (≥0.80). Below 0.38 carbon conversion rates, a syngas injection ratio of 0.18, and oxygen flow rates >1200 kg/h induce spontaneous reactor heating, compromising efficiency and escalating costs. Furthermore, utilizing syngas in the regenerator ensures self-sufficiency and supplementary thermal energy, thereby reducing dependence on external energy sources. This research addresses critical deficiencies in waste-to-energy technologies, emphasizing potential strides in sustainable municipal waste management and energy generation.