Abstract
This communication reports the thermodynamic equilibrium analysis of the reactions involved in a chemical-looping combustion (CLC) process using methane, ethane and syngas as the fuels simulating the gaseous fuel-based CLC process. As an oxygen carrier, alumina-supported nickel containing material is used due to its superior oxygen carrying capacity and durability under expected condition in power plants. The effects of temperature and fuel/oxygen carrier ratio are studied using the Gibbs free energy minimization technique determining the composition of the combustion products. The analysis shows that CO2 can be concentrated and purified up to 99.5 % purity in such a process during the fuel combustion cycle with the nickel-based oxygen carrier. This observation is consistent with the experimental studies showing complete fuel combustion at studied reaction conditions.
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