A Green Energy Closed-Loop System Based on Aluminum
アルミニウムに基づくグリーンエネルギー閉ループシステム (AI 翻訳)
Hong-Wen Wang, Liang-Ying Huang
🤖 gxceed AI 要約
日本語
本論文は、アルミニウム粉末と水の反応による水素製造と、再生可能エネルギーを用いた副生成物のアルミニウムへのリサイクルからなる閉ループシステムをレビューする。エネルギー密度は29.7 kJ/gと高く、常温動作で直接CO2排出ゼロだが、往復効率34.5-46.6%やパッシベーション層管理など課題も多い。季節間エネルギー貯蔵やオフグリッド用途に有望である。
English
This paper reviews a closed-loop system for sustainable hydrogen production via aluminum-water reaction, coupled with renewable energy-driven recycling of byproducts. It offers high energy density (29.7 kJ/g), ambient operation, and zero direct carbon emissions, but faces challenges in round-trip efficiency (34.5-46.6%) and technological maturity. The system shows potential for seasonal storage and off-grid applications.
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
日本の水素戦略やエネルギー貯蔵政策と関連するが、本システムは実験段階であり、実用化にはコストや技術的課題が残る。日本の再生可能エネルギー拡大に伴う長期貯蔵ニーズに貢献する可能性がある。
In the global GX context
This paper presents an alternative hydrogen production and energy storage pathway, contributing to the global energy transition. It highlights a potential complementary technology to water electrolysis, especially for seasonal storage, but requires further development for commercial viability.
👥 読者別の含意
🔬研究者:Provides a comprehensive framework for assessing aluminum-based energy cycles, including thermodynamic and economic analysis.
🏛政策担当者:Relevant for considering long-term energy storage solutions in national energy strategies.
📄 Abstract（原文）
This paper presents a focused review of a closed-loop system for sustainable hydrogen production utilizing the reaction between metallic aluminum powders and water, coupled with renewable energy-driven recycling of aluminum hydroxide (or alumina) byproducts back to metallic aluminum powders. A green energy closed-loop system based on aluminum could be achieved if the converting process is accomplished by a green Hall–Héroult process, where a cermet inert anode was used. Meanwhile, the byproduct alumina is converted back to the liquid form of aluminum at high temperature (up to 960 °C), producing pure oxygen. A high-pressure atomization process is then used to break the aluminum droplets into powder using argon gas. The technical feasibility, thermodynamic efficiency, economic viability, environmental sustainability, and comparison of this green aluminum cycle with existing hydrogen production and energy storage technologies are discussed. The aluminum–water reaction offers exceptional energy density (29.7 kJ/g of Al), ambient temperature operation, and zero direct carbon emissions. However, commercial implementation faces substantial challenges including overall round-trip energy efficiency (estimated 34.5–46.6%), technological maturity of the recycling process, passivation layer management, and economic competitiveness with conventional water electrolysis. Despite these challenges, the system demonstrates advantages for seasonal energy storage, off-grid applications, and integration with intermittent renewable energy sources. This analysis provides a framework for researchers, engineers, and policymakers to assess the potential role of aluminum-based energy cycles in the global energy transition toward carbon neutrality.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3390/en19030853first seen 2026-05-15 20:04:18
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