Potential CO₂ Emission Reduction and H₂ Production Using Industrial Slag Wastes Originating from Different Industrial Sectors

Previous empirical research demonstrated that by mixing gasification and metallurgical slags at a specific composition in a CO₂ enriched environment, enough exothermic heat would be generated to transform CO₂ to CO. The process capacity may be limited by the availability of the slags, however, it could be used to supplement existing energy or chemical production to reduce overall carbon emission. In this study, computational simulations were performed to explore optimal process conditions based on effects of individual slag constituents and thermal input for maximal gas conversion rate, heat production, and volume increase. In simulated conversions of CO₂ to CO and H₂O to H₂, comparisons were made by varying CaO, FeO, versus V₂O₃ slag constituents. The result indicated the optimal slag composition may be obtained by appropriate source selection and mixing of gasification and metallurgical slags in order to maximize carbon reduction and/or H₂ production.