Abstract
In this study, a newly developed geothermal energy-based calcium-iron bromide cycle for hydrogen generation and potential use in the Sabatier reactor for ultimately methane production is analyzed. Hydrogen, produced by the thermochemical cycle, and CO2, emitted by the cement factory are supplied to the Sabatier reactor. Methane obtained in the reactor is used in the gas cooker, combi boiler, and gas engine for the electricity and heating requirements of a community. The system is entirely analyzed in terms of thermodynamics. Parametric studies are conducted for different ambient temperatures and mass flow rates of the gases. The waste heat is minimized by integrating subsystems. Electricity and heating power with a rate of 39.72 MW and 10.4 MW are provided to the community. The energy and exergy efficiencies of the thermochemical cycle are calculated as 9.8% and 11.12%, respectively. A 5.5 kg/s of CO2 is captured and utilized in the integrated system.
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