持続可能な航空燃料の気候変動への包括的な影響評価
Luc Boerboom1, Arvind Gangoli Rao1, Volker Grewe1,2
1Faculty of Aerospace Engineering, Delft University of Technology, Delft, The Netherlands.
Scientific reports
|August 30, 2025
まとめ
サステナブル航空燃料 (SAF) は,現在の規制がフライト中の非CO2排出を無視しているため,限られた気候上の利益を示しています. 私たちの分析によると,SAFは,NOxとコントライル効果によるCO2 ekvivalentの排出量を50%未満に削減します.
科学分野:
- 航空環境科学
- 気候変動の緩和
- 持続可能なエネルギー
背景:
- 持続可能な航空燃料 (SAF) は,航空を脱炭素化するために促進されます.
- CORSIAのような既存の規制は 飛行中の非CO2排出を しばしば無視しています
- 気候への影響の正確な評価には,CO2効果と非CO2効果の両方を評価する必要があります.
研究 の 目的:
- SAFの地球温暖化の可能性を徹底的に分析する.
- SAFの燃焼による非CO2排出量の気候への影響を定量化する.
- 従来のジェット燃料と比較してSAFの実際の気候上の利益を決定する.
主な方法:
- 燃料の生産と飛行中の排出をカバーするウェル・トゥ・ウェイク分析を行った.
- NOx,H2O,コントライル排出量の気候への影響を定量化しました.
- 20年,50年,100年の平均温度反応を用いて,非CO2インパクトをCO2等価 (CO2e) に変換した.
主要な成果:
- SAFの井戸から目覚めまでのCO2e値は150から250g/MJの範囲です.
- SAFを使用した最大CO2e削減量は,従来のジェット燃料と比較して50%未満です.
- 飛行中のNOxとコントライルの影響は,SAFの全体的な気候効果を大幅に制限します.
結論:
- 飛行中の非CO2排出を無視すると,SAFの気候上の利益は過大評価される.
- 二酸化炭素以外の影響を含む全体的な評価は,SAFの真の気候影響の評価に不可欠です.
- SAFの性能を正確に評価するために,政策の枠組みは飛行中の排出を組み込む必要があります.
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