Process Evaluation of Use of High Temperature Gas-cooled Reactors to an Ironmaking System Based on Active Carbon Recycling Energy System

• Hayashi Kentaro

  Department of Modern Mechanical Engineering, Waseda University

• Kasahara Seiji

  Nuclear Hydrogen and Heat Application Research Center, Japan Atomic Energy Agency

• Kuribara Kouhei

  Department of Modern Mechanical Engineering, Waseda University

• Nakagaki Takao

  Department of Modern Mechanical Engineering, Waseda University

• Yan Xing L.

  Nuclear Hydrogen and Heat Application Research Center, Japan Atomic Energy Agency

• Inagaki Yoshiyuki

  Nuclear Hydrogen and Heat Application Research Center, Japan Atomic Energy Agency

• Ogawa Masuro

  Nuclear Hydrogen and Heat Application Research Center, Japan Atomic Energy Agency

抄録

Reducing coking coal consumption and CO₂ emissions by application of iACRES (ironmaking system based on active carbon recycling energy system) was investigated using process flow modeling to show effectiveness of HTGRs (high temperature gas-cooled reactors) adoption to iACRES. Two systems were evaluated: a SOEC (solid oxide electrolysis cell) system using CO₂ electrolysis and a RWGS (reverse water-gas shift reaction) system using RWGS reaction with H₂ produced by iodine-sulfur process. Both reduction of the coking coal consumption and CO₂ emissions were greater in the RWGS system than those in the SOEC system. It was the reason of the result that excess H₂ not consumed in the RWGS reaction was used as reducing agent in the blast furnace as well as CO. Heat balance in the HTGR, SOEC and RWGS modules were evaluated to clarify process components to be improved. Optimization of the SOEC temperature was desired to reduce Joule heat input for high efficiency operation of the SOEC system. Higher H₂ production thermal efficiency in the IS process for the RWGS system is effective for more efficient HTGR heat utilization. The SOEC system was able to utilize HTGR heat to reduce CO₂ emissions more efficiently by comparing CO₂ emissions reduction per unit heat of the HTGR.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 55 (2), 348-358, 2015

  一般社団法人 日本鉄鋼協会

キーワード

• carbon recycling iron and steel production
• high temperature gas-cooled reactor
• CO₂ electrolysis
• reverse water gas shift reaction
• process flow analysis
• CO₂ emissions

詳細情報

• CRID: 1390001206488755456
• NII論文ID: 130004734551
• DOI: 10.2355/isijinternational.55.348
• ISSN: 13475460
• ISSN: 09151559
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/55/2/55_348/_pdf
• 本文言語コード: en
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