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Building technology choice and development support tools toward achieving a low-carbon society with carbon circulation

Research Project

Project/Area Number 18K18228
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 64050:Sound material-cycle social systems-related
Research InstitutionTohoku University

Principal Investigator

Ohno Hajime  東北大学, 工学研究科, 助教 (20769749)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords炭素循環 / プラスチックリサイクル / 産業連関分析 / マテリアルフロー解析 / プラスチック / リサイクル / 炭素 / 温室効果ガス排出 / ライフサイクル評価 / 低炭素 / 廃棄物リサイクル / 低炭素社会 / 技術選択最適化 / ライフサイクルアセスメント
Outline of Final Research Achievements

For deep carbon emission reductions beyond decarbonization of the energy supply, recycling-induced elimination of materially retained carbon (MRC) releases to the atmosphere has a great direct reduction potential. Moreover, recycled materials indirectly avoid the manifestation of cradle-to-gate carbon footprints of virgin materials that would otherwise enter anthropogenic cycles. This study comprehensively quantifies the carbon emission reduction potential of recycling activities through an input-output-based material flow analysis. Here, we reveal the Japanese economy-wide potential emission savings, 30.2 Mt-CO2 could have been achieved through maximal MRC recycling from households (i.e., post-consumer recycling) in 2011. The identified structures of direct and indirect reductions on value chains allow for efficiently directing the advancement of recycling technologies and policies toward the deep decarbonization of society.

Academic Significance and Societal Importance of the Research Achievements

これまでのリサイクル技術のLCAでは、特定の廃棄物に対して特定のリサイクル技術を適用する事例研究が中心であった。本研究は、幅広い製品種に素材の形で含有される炭素に着目し、リサイクル技術を特定せずに、「その炭素が、リサイクルによって完全同質の素材に再生できるとしたら」の前提に基づいて、循環利用できる炭素の最大量を見積もった。化学繊維製造時のCO2排出量が多きいことから、衣料品の長期利用、再利用、効率的なリサイクルが重要であること、リサイクル率が高いと思われがちなプラスチック製品も、適切なリサイクル関連法が適用されないためにプラスチック中炭素の約40%が散逸していることが明らかとなった。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (7 results)

All 2021 2020 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Detailing the economy-wide carbon emission reduction potential of post-consumer recycling2021

    • Author(s)
      Ohno Hajime、Shigetomi Yosuke、Chapman Andrew、Fukushima Yasuhiro
    • Journal Title

      Resources, Conservation and Recycling

      Volume: 166 Pages: 105263-105263

    • DOI

      10.1016/j.resconrec.2020.105263

    • Related Report
      2020 Research-status Report
  • [Journal Article] Clarifying Demographic Impacts on Embodied and Materially Retained Carbon toward Climate Change Mitigation2019

    • Author(s)
      Shigetomi Yosuke、Ohno Hajime、Chapman Andrew、Fujii Hidemichi、Nansai Keisuke、Fukushima Yasuhiro
    • Journal Title

      Environmental Science & Technology

      Volume: 53 Issue: 24 Pages: 14123-14133

    • DOI

      10.1021/acs.est.9b02603

    • NAID

      120006980762

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 素材としての炭素滞留から見たカーボンマネジメントの可能性2020

    • Author(s)
      大野 肇
    • Organizer
      日本LCA学会第15回研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 序列付きシステム合成による 未知な条件の存在下でのプラスチック循環社会の設計支援2020

    • Author(s)
      加藤 由樹, 大野 肇, 福島 康裕
    • Organizer
      日本LCA学会第15回研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] Comprehensive Quantification of Potential Benefits from Plastic Recycling2019

    • Author(s)
      Hajime Ohno
    • Organizer
      IFSR 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 最適化による技術選択手法を応用した新技術の複数要素間すり合わせに資するライフサイクル視点導入2019

    • Author(s)
      安地幸乃、大野肇、福島康裕
    • Organizer
      第14回日本LCA学会研究発表会
    • Related Report
      2018 Research-status Report
  • [Presentation] Evaluation of Carbon Intensity of Goods Consumed by Households by Integrating Footprint and Flow of Carbon: the Case of Japan2018

    • Author(s)
      Hajime Ohno, Yosuke Shigetomi, Yasuhiro Fukushima
    • Organizer
      The13th Biennial International Conference onEcobalance
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2023-01-30  

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