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

DOI Web Site 4 Citations 5 References Open Access
  • Fujii Gentaro
    Department of Environmental Science and Technology, Tokyo Institute of Technology
  • Ryu Junichi
    Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
  • Yoshida Katsumi
    Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
  • Yano Toyohiko
    Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
  • Kato Yukitaka
    Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology

Abstract

Efficient carbon dioxide (CO2) reduction into carbon monoxide (CO) is required to establish a smart iron-making 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 km2 were required for the reduction of 30% CO2 in blast furnace gas emitted from a conventional blast furnace.

Journal

  • ISIJ International

    ISIJ International 55 (2), 387-391, 2015

    The Iron and Steel Institute of Japan

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