Techno-economic assessment of SEWGS integration in steel plants for CO2 mitigation

Abstract

This work discusses the techno-economic assessment of different steel production routes, two of them integrating the SEWGS technology in their plant layout. The different plants are compared through environmental and economic KPIs. The DRI/EAF+SEWGS plant shows the lowest specific CO2 emissions and the lowest cost of CO2 avoided, equal to 100 €/tCO2 for the renewable energy scenario. An alternative route to the DRI/EAF, adopting an open slag bath furnace and a basic oxygen furnace is also discussed. This routes gives the possibility to use low grade pellet in the shaft furnace solving the issue of the lack of high quality pellets.

Keywords: Pre-combustion capture, CO2 removal (CDR), Techno-economic, Industrial symbiosis, SEWGS, Steel, Open slag bath furnace