アニオン交換膜電解のライフサイクル・技術経済評価：ゲート・トゥ・ゲートのサプライチェーン排出と規模依存コスト分析
Life cycle and techno-economic assessment of anion exchange membrane electrolysis: Cradle-to-gate supply chain emissions and scale-dependent cost analysis (原題)
Sanghyuk Koh, Junseok Ha, Dohyeon Kim, Seokju Kim, Song Jin, Sungmook Choi, Boreum Lee
🤖 gxceed AI 要約
日本語
アニオン交換膜（AEM）電解による水素製造を、実験検証済みのライフサイクルインベントリと確率的技術経済分析で統合評価した。Net Zero 2050電網で炭素足跡は2.53 kgCO2eq/kgH2、ゼロ炭素電源では0.44 kgCO2eq/kgH2が下限となり、上流素材・部材製造が不可避の排出源となる。水素コストは1,000 kg/日で8.16ドル/kgH2から50,000 kg/日で5.05ドル/kgH2へ低下し、規模拡大がコストと経済的不確実性を同時に低減する。
English
An integrated LCA and probabilistic techno-economic assessment of anion exchange membrane electrolysis using experimentally validated inventory data. Under a Net Zero 2050 grid the carbon footprint is 2.53 kgCO2eq/kgH2, while zero-carbon electricity yields an irreducible 0.44 kgCO2eq/kgH2 floor from upstream materials. Levelized hydrogen cost falls from $8.16/kg at 1,000 kg/day to $5.05/kg at 50,000 kg/day, with scale also narrowing economic uncertainty.
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
日本は水素社会推進とグリーン水素の炭素認証制度整備を進めており、上流サプライチェーン排出を組み込んだ本評価は、水素の炭素強度算定や認証基準設計に直接示唆を与える。電解装置の規模別コスト曲線は国内水素供給拠点の投資判断にも有用。
In the global GX context
As global hydrogen standards (EU RFNBO, ISO, and emerging certification schemes) tighten around upstream emissions, this study shows why cradle-to-gate accounting is essential for credible green-hydrogen claims. Its scale-dependent cost and uncertainty analysis informs electrolyzer deployment and carbon certification design worldwide.
👥 読者別の含意
🔬研究者:AEM電解のLCAとTEAを統合した手法は、新興電解技術の炭素強度・コスト評価の枠組みとして参照価値が高い。
🏢実務担当者:水素調達や電解装置投資の際、上流排出と規模別コストを織り込んだ調達・投資判断に活用できる。
🏛政策担当者:グリーン水素の炭素認証基準に上流サプライチェーン排出を組み込む必要性を示す根拠となる。
📄 Abstract（原文）
This study presents an integrated assessment of anion exchange membrane electrolysis that combines experimentally validated lifecycle inventory data, comprehensive cradle-to-gate greenhouse gas accounting, and probabilistic techno-economic analysis under scale-dependent conditions. The results demonstrate that under a realistic Net Zero 2050 grid scenario, the total carbon footprint is estimated at 2.53 kgCO 2 eq/kgH 2 , with electricity consumption dominating the environmental impact. However, evaluating the system under an ideal zero‑carbon electricity supply reveals a baseline footprint of 0.44 kgCO 2 eq/kgH 2 , demonstrating that upstream material production and component manufacturing impose an irreducible minimum emission threshold. Economically, the levelized cost of hydrogen decreases from $8.16/kgH 2 at a production scale of 1,000 kgH 2 /day to $5.05/kgH 2 at 50,000 kgH 2 /day, driven primarily by economies of scale. Notably, the two-parameter interaction analysis reveals that system availability and electrochemical efficiency act as primary co-optimization drivers, exhibiting a pronounced synergistic interaction for global warming potential while delivering additive economic benefits for hydrogen production cost. Furthermore, increasing system scale not only lowers costs but also progressively narrows economic uncertainty. These findings highlight that the sustainability of green hydrogen cannot be accurately evaluated without incorporating upstream supply chain impacts alongside operational metrics. The study provides an evidence-based framework for evaluating emerging electrolysis technologies and informing rigorous carbon certification standards.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.apenergy.2026.128940first seen 2026-10-16 04:46:31
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