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Development of an Inexpensive Mercury Vapor Removal System Using Chlorine-Doped Carbonaceous Materials

Research Project

Project/Area Number 21K19855
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 64:Environmental conservation measure and related fields
Research InstitutionHokkaido University

Principal Investigator

TSUBOUCHI Naoto  北海道大学, 工学研究院, 准教授 (90333898)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2021: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Keywords環境技術 / 環境対応 / 有害化学物質 / 表面・界面物性
Outline of Research at the Start

本研究では、化石資源の燃焼や廃棄物の焼却に基因する水銀の問題の解決を目指し、塩素で表面修飾した炭素質物質を用いる安価な水銀蒸気除去システムの開発を行う。初年度は提案する除去法の開発原理を確立するために必要な要素技術(高表面積・高活性サイト数の炭素質物質の調製や塩素で表面修飾した炭素ベース水銀吸着剤の製造)に関する研究を行い、最終年度は得られた結果に基づき実際の排ガス組成中での最適除去条件を明らかにする。また、水銀除去剤の再生法を確立する。最終的には、世界で最も厳しい水銀排出規制(カナダの3μg/kWh)を満足する除去技術を提案する。

Outline of Final Research Achievements

To develop a carbon-based Hg remover surface modified with chlorine, the effect of metal species on chlorine doping was investigated. The results showed that the extent of reaction of HCl with carbon containing K and Ca increased with increasing carbon active sites, and the intensity of XPS peaks attributed to inorganic and organic Cl species increased significantly compared to carbon alone. In addition, to produce activated carbon from inexpensive raw materials, peat was mixed with urea and natural soda ash, which has abundant reserves, and heated to 800-900℃. It was found that activated carbon with a large surface area and pore volume could be produced. Furthermore, the adsorption capacity of chlorine-doped carbonaceous material, a Si recovery residue from rice husks, for gaseous metallic mercury was high (more than twice that of conventional materials), indicating that the interaction between mercury and chlorine is strong.

Academic Significance and Societal Importance of the Research Achievements

学術的には、安価な原料から調製した炭素質物質の表面をClで修飾し、Hg除去剤として用いる点に最大の特徴がある。このような試みは「低品位の褐炭由来の炭素活性サイトはHClと容易に反応して、有機Cl種に変化する」という発見に基づいており、極めて独創的な研究である。本成果は、コークス炉、焼結機のみならず高炉や電気炉の排ガスならびに石炭やバイオマスの燃焼排ガス、ガス化とガスタービンもしくは燃料電池を組み合せた複合発電システム用の燃料ガスなどに適応可能な簡便で低コスト型の高温ガス精製法に展開する可能性が多いに期待され、その社会的意義は非常に大きい。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (9 results)

All 2022 2021 Other

All Journal Article (6 results) (of which Peer Reviewed: 4 results) Presentation (2 results) (of which Invited: 2 results) Remarks (1 results)

  • [Journal Article] Evolution of Mercury from Iron Ores in Temperature-Programmed Heat Treatments2022

    • Author(s)
      Javzandolgor Bud, Yuuki Mochizuki, Naoto Tsubouchi
    • Journal Title

      ISIJ International

      Volume: 62 Issue: 1 Pages: 20-28

    • DOI

      10.2355/isijinternational.ISIJINT-2021-295

    • NAID

      130008144908

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2022-01-15
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] 製鉄プロセスに係わる水銀の発生挙動と排出抑制2022

    • Author(s)
      坪内直人
    • Journal Title

      鉄鋼環境基金研究討論会要旨集

      Volume: 13 Pages: 1-2

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Evaluation of Mercury Form in Iron Ore through Sequential Leaching and Temperature-Programmed Heat Treatment Methods2022

    • Author(s)
      Javzandolgor Bud, Yuuki Mochizuki, Naoto Tsubouchi
    • Journal Title

      Fuel

      Volume: 308 Pages: 121953-121953

    • DOI

      10.1016/j.fuel.2021.121953

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] 製鉄原燃料の加熱過程における水銀の排出挙動2022

    • Author(s)
      坪内直人, 望月友貴, Bud Javzandolgor
    • Journal Title

      材料とプロセス

      Volume: 183

    • Related Report
      2021 Research-status Report
  • [Journal Article] Behavior of Mercury Release from Iron Ores during Temperature-Programmed Heat Treatment in Air2021

    • Author(s)
      Javzandolgor Bud, Yuuki Mochizuki, Naoto Tsubouchi
    • Journal Title

      Environmental Science and Pollution Research

      Volume: 28 Issue: 46 Pages: 66496-66500

    • DOI

      10.1007/s11356-021-17002-7

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mercury (II) Ion Adsorption Performance of Cl-Loaded Carbonaceous Material Prepared by Chlorination of Pyrolyzed Rice Husk Char2021

    • Author(s)
      Yuuki Mochizuki, Javzandolgor Bud, Jiaqian Liu, Miki Takahashi, Naoto Tsubouchi
    • Journal Title

      Journal of Cleaner Production

      Volume: 305 Pages: 127176-127176

    • DOI

      10.1016/j.jclepro.2021.127176

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 製鉄プロセスに係わる水銀の発生挙動と排出抑制2022

    • Author(s)
      坪内直人
    • Organizer
      鉄鋼環境基金研究討論会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 製鉄原燃料の加熱過程における水銀の排出挙動2022

    • Author(s)
      坪内直人, 望月友貴, Bud Javzandolgor
    • Organizer
      日本鉄鋼協会第183回春季講演大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Remarks] エネルギー変換システム設計研究室ホームページ

    • URL

      https://chemeng-hokudai.jp/

    • Related Report
      2022 Annual Research Report 2021 Research-status Report

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Published: 2021-07-13   Modified: 2024-01-30  

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