Thermodynamic Calculation of Generation of H₂ Gas by Reaction between FeO in Steelmaking Slag and Water Vapor

Abstract

Hydrogen gas is one of key materials for promotion of the utilization of energy with low environmental load. Ironmaking and steelmaking processes produce enormous thermal energy during steel production, most of which are not used before final dissipation to natural environment. In the present study, the environmental-friendly H₂ gas production process by converting H₂O gas with FeO and thermal energy in steelmaking slag has been proposed, and physicochemical properties of reaction between FeO-containing steelmaking slag and H₂O-containing gas have been estimated by applying thermodynamic calculation. The effects of slag temperature and compositions, gas temperature, and partial pressure of H₂O on production behavior of H₂ gas have been investigated.