Impact of Scrap and Hydrogen-Based Direct Reduced Iron Ratios on Energy Demand, Emissions, and Oxygen Management in Green Steelmaking
グリーン製鋼におけるスクラップと水素ベース直接還元鉄の比率がエネルギー需要、排出量、酸素管理に与える影響 (AI 翻訳)
F. Eckl, A. Moita, T. Sousa, R. Neto
🤖 gxceed AI 要約
日本語
鉄鋼生産の脱炭素化に向け、電気炉と水素直接還元鉄（H2-DRI）を組み合わせた電化製鋼プロセスを詳細な物質・エネルギーバランスモデルで分析。H2-DRI比率が電力需要、CO2排出、酸素管理に与える影響を定量化し、再生可能電力で最大95%の排出削減が可能と示した。
English
This study develops a bottom-up mass and energy balance model for electrified steelmaking using EAF with H2-DRI and scrap. It quantifies how H2-DRI ratio affects electricity demand, CO2 emissions, and oxygen management, showing up to 95% emission reduction under renewable electricity and full oxygen coverage at 10-13% H2-DRI.
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
日本の鉄鋼業はカーボンニュートラル目標に向け、水素還元や電気炉の導入を検討している。本モデルは、SSBJ開示や移行計画策定において、技術経路の定量的評価に活用できる。
In the global GX context
This paper provides a robust modeling framework for assessing hydrogen-based steelmaking pathways, relevant for global decarbonization strategies and transition finance decisions. It offers quantitative insights for companies aligning with ISSB/CSRD disclosure requirements.
👥 読者別の含意
🔬研究者:Provides a detailed process model for H2-DRI-EAF integration, useful for further optimization and scenario analysis.
🏢実務担当者:Helps steelmakers evaluate the impact of H2-DRI ratios on energy and emissions, informing investment and operational decisions.
🏛政策担当者:Offers quantitative evidence for designing policies that promote green steel and hydrogen infrastructure.
📄 Abstract（原文）
Steel production contributes significantly to global emissions, making its decarbonization essential. Electrified steelmaking based on electric arc furnaces (EAF) using hydrogen-based direct reduced iron (H2-DRI) and scrap is a promising pathway. This study analyzes how the H2-DRI:scrap ratio affects electricity demand, CO2 emissions, slag formation, and oxygen management. To address limitations of approaches based on aggregated data and linear scaling assumptions, a detailed bottom-up mass and energy balance model is developed, explicitly resolving process interactions between electrolysis, direct reduction, and EAF steelmaking. Eight H2-DRI:scrap ratios ranging from 0:100 to 100:0 are evaluated. Electricity demand increases from 1.1 GJ/tSteel (0.31 MWh/tSteel) for scrap-based operation to 13.9 GJ/tSteel (3.86 MWh/tSteel) for fully H2-based production, largely driven by hydrogen generation. Consequently, emissions strongly depend on electricity carbon intensity, with reductions of up to 95% under renewable supply. Electrolytic oxygen can fully cover process demand at ~10–13% H2-DRI, enabling system integration benefits. A sensitivity analysis evaluates the influence of key process parameters on electricity demand, CO2 emissions, and oxygen management, demonstrating the robustness of the proposed modelling approach.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://www.mdpi.com/1996-1073/19/15/3620/pdf?version=1785651220first seen 2026-08-08 05:24:37
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