世界の鉄鋼工場のCO2排出量と炭素中立性の経路
Tianyang Lei1, Daoping Wang2,3, Xiang Yu4,5
1Department of Earth System Science, Tsinghua University, Beijing, China.
Nature
|September 21, 2023
まとめ
鉄鋼産業
科学分野:
- 産業エコロジー
- 気候変動の緩和
- 材料科学
背景:
- 鉄鋼部門は世界の工業二酸化炭素排出量の25%を占めています.
- 植物特有の脱炭素化経路は不明であり,純ゼロへの移行の進展を妨げています.
研究 の 目的:
- 4883の鉄鋼工場のCO2排出量の詳細なインベントリを作成する.
- 各プラントの技術特有の脱炭素化ロードマップを作成する.
- 早期改修が世界の排出削減に与える影響を評価する.
主な方法:
- 鉄鋼工場の技術的特徴をまとめた.
- 特定のプラントの処理ルートにマッチした排出除去またはゼロエミッション技術.
- 工場の稼働年数に基づいて 改修窓口を分析した.
主要な成果:
- 全世界の発電所の57%が 低炭素技術のための8~24年後の改修窓口を持っていることを確認しました
- 温暖化を2°Cに制限するために,低炭素の改造が不可欠であり,先進的な改造は1.5°Cの目標を支援することを決定しました.
- プラントの改修を5年進めることで,2020年から2050年にかけての累積CO2排出量を69.6Gt削減できると見積もられている.
結論:
- 工場特有の技術主導の脱炭素化ロードマップは,鉄鋼部門の純ゼロへの移行に不可欠です.
- 低炭素技術が早期に導入されれば,地球規模での排出削減を大幅に加速できます.
- この研究は,個々のプラントが気候変動の緩和目標に寄与するための排出量と実行可能な経路の詳細な見方を提供しています.
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