Thermodynamic Calculation of Reaction and Equilibrium between Coal and FeO-containing Slag in the Atmosphere of CO₂ Gas

Abstract

High temperature slags could act as not only heat carrier and catalyst but also reactants in some chemical reactions to produce syngas due to the individual components in slags. A new method is put forward to utilize the thermal energy of converter slags to generate CO gas which could improve the energy utilization efficiency. Thermodynamics of the reactions among coal, FeO–CaO–SiO₂ slag and gas was studied by thermodynamic calculation under steady temperature condition or no enthalpy change condition. The effects of FeO amount in initial slag, mass%CaO/mass%SiO₂ ratio of slag, and slag temperature on the behavior of the production of H₂ and CO gases were clarified.