Possibility of Application of Solid Oxide Electrolysis Cell on a Smart Iron-making Process Based on an Active Carbon Recycling Energy System

Abstract

Efficient carbon dioxide (CO2) reduction into carbon monoxide (CO) is required to establish a smart ironmaking process based on an active carbon recycling energy system (iACRES). A disk-type solid oxide electrolysis cell (SOEC) was prepared and examined experimentally for application to the CO2 reduction process in iACRES. A SOEC with a cathode|electrolyte|anode structure of Ni-YSZ|YSZ|La0.6Sr0.4Co0.2Fe0.8O3-δ was fabricated. The electrolysis of carbon dioxide was conducted at 800-900°C. A current density of 107.1 mA cm -2 was measured between the cathode and anode at 900°C and at 2.52 V. The production rates of CO and O2 were in agreement with the theoretical values determined using Faraday's law. Evaluation of iACRES using the experimental results indicated that an estimated 0.73 high-temperature gas cooled reactor units as the primary energy source for CO2 reduction and a SOEC surface area of 0.098 km 2 were required for the reduction of 30% CO2 in blast furnace gas emitted from a conventional blast furnace.

Research on the corrosion behavior of low carbon mold flux on submerged nozzle refractory

“…At present, domestic and foreign metallurgists are also committed to the research and development of gas-based shaft furnace-electric furnace smelting mode, in order to explore the best path for low-carbon ironmaking. [7][8][9][10][11][12] However, the "double carbon" task is a huge challenge for the steelmaking process. It is not easy to achieve the low-carbon steelmaking task while meeting the requirements of high-quality steel smelting.…”

“…In addition, the traditional blast‐converter smelting mode is replaced by the gas‐base shaft furnace‐electric furnace short‐process smelting mode, which can significantly reduce coke consumption and energy consumption. At present, domestic and foreign metallurgists are also committed to the research and development of gas‐based shaft furnace‐electric furnace smelting mode, in order to explore the best path for low‐carbon ironmaking 7–12 …”

Development of Metal Supported SOEC for Carbon Recycling Iron Making System

“…17) SOECs have been made of ceramics in the past, and it was difficult to increase the area and capacity, and most importantly, it was difficult to perform large-scale CO 2 treatment required by the iACRES. 18) Here, we proposed a metal-supported SOEC (MS-SOEC). 19) Since MS-SOEC is supported by metal, the area can be made larger and it can be stacked.…”