Development of Metal Supported SOEC for Carbon Recycling Iron Making System

Abstract

A new solid oxide electrolysis cell (SOEC)—a metal-supported SOEC (MS-SOEC) where the SOEC is structured on a metal support and is capable of extending the cell surface area to a wider extent than a conventional ceramics base SOEC—was designed for carbon dioxide (CO₂) recycling in the ironmaking process. The MS-SOEC demonstrated CO₂ reduction and CO and oxygen production properties. The possibility of carbon cycling was examined with the CO₂ resource utilization technology using MS-SOEC and its application to the iron-making process. The required cell area of MS-SOEC for an iACRES, which combines an active carbon recycling energy system (ACRES) and a steelmaking process, was estimated using experimental results. By improving the performance of the cell, MS-SOEC was expected to be applied to a carbon recycling ironmaking system that could contribute to the establishment of a zero-emission CO₂ iron making system.