水素ベース製鉄への転換におけるシステム効率を評価する将来予測的プラントレベル物質フロー分析
A prospective plant-level material flow analysis to assess systemic efficiency in the transition to hydrogen-based steelmaking (原題)
M. Langhorst, Romain G. Billy, Xingqiang Song, Daniel Beat Müller
🤖 gxceed AI 要約
日本語
本研究は、従来の高炉・転炉法から水素直接還元鉄（H2-DRI）・電気炉（EAF）製鉄への転換を、プラント単位の将来予測的物質フロー分析（MFA）で評価した。スウェーデンの事例では、H2-DRI-EAF経路でGHGを最大89%削減できる一方、電力使用量は最大18倍に増加する。資源効率対策を組み合わせると水素需要を10%、電力需要を20%削減できることを示した。
English
This study applies prospective plant-level Material Flow Analysis to assess the transition from blast furnace–basic oxygen furnace to hydrogen-based DRI-EAF steelmaking, using a Swedish case. The H2-DRI-EAF pathway cuts GHG emissions by up to 89% but raises electricity use up to 18-fold. Combined resource efficiency measures reduce hydrogen demand by 10% and electricity demand by 20%, supporting site-specific decarbonization roadmaps.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の鉄鋼業はGX政策の中核であり、水素製鉄は経団連・NEDOの重点領域。本稿のプラント単位MFA手法は、日本製鉄所の脱炭素ロードマップ策定や水素需要・電力インフラ計画に直接応用可能で、SSBJのScope1/2開示や移行計画の定量根拠としても有用。
In the global GX context
Steel decarbonization is central to global net-zero pathways and transition finance. This plant-level MFA offers a replicable method for assessing hydrogen-based steelmaking's systemic resource impacts, informing corporate transition plans under ISSB/CSRD and guiding investment in low-carbon hydrogen infrastructure.
👥 読者別の含意
🔬研究者:プラント単位MFAを水素製鉄転換のシステム評価に適用した先駆的手法として、産業代謝研究に有用。
🏢実務担当者:水素製鉄への移行に伴う電力・水素需要の急増と資源効率対策の効果を定量化し、脱炭素投資計画の立案に活用できる。
🏛政策担当者:水素インフラ整備と電力系統計画の必要性を示し、鉄鋼脱炭素支援策の設計に示唆を与える。
📄 Abstract（原文）
Abstract Decarbonizing steel production requires adopting low-carbon technologies and the efficient use of available resources, yet the effects of such a transition on the metabolism of the plant remain underexplored. This study applies a prospective plant-level Material Flow Analysis (MFA) to assess the transition from the conventional blast furnace–basic oxygen furnace route to hydrogen (H 2 )-based Direct Reduced Iron (DRI), Electric Arc Furnace (EAF) steelmaking, and hydrogen combustion in the rolling mill, in combination with resource efficiency interventions. Using a Swedish case study, we quantify material, energy, and carbon flows across the production chain under different decarbonization strategies. The results show up to 89% reduction in greenhouse gas emissions in the H 2 -DRI-EAF pathway compared to the BF-BOF system, alongside up to an 18-fold increase in electricity use driven by hydrogen production and electrification. However, achieving emission reductions at this scale depends on the availability of low-carbon hydrogen, which is currently limited. Material efficiency measures generate cascading upstream effects through reduced EAF losses and downstream scrap generation, lowering hydrogen and electricity demand. Energy efficiency measures–especially improved electrolyser efficiency–primarily reduce electricity demand within the processes where they are implemented, but still contribute significantly to overall electricity savings. Combined, these resource efficiency measures reduce hydrogen demand by 10% and electricity demand by 20%. This work demonstrates how prospective plant-level MFA can support strategic planning and site-specific decarbonization roadmaps by capturing the systemic impacts of technology shifts and resource efficiency interventions.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1007/s44498-026-00166-1first seen 2026-09-26 04:36:43
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