Ammonia diffusion combustion enables efficient and clean ammonia engines
アンモニア拡散燃焼により効率的でクリーンなアンモニアエンジンが実現 (AI 翻訳)
Yao M, Yang R, Zhang S, Li Y, Yue z, Wang H, Zheng Z
🤖 gxceed AI 要約
日本語
この研究は、アンモニアの拡散燃焼がN2Oや未燃NH3の排出をほぼゼロにでき、NOx排出も従来の予混合燃焼に比べて60%以上削減できることを実験的に示した。高温の燃料過濃領域での重合反応がクリーン燃焼の鍵であり、クリーンなアンモニアエンジンの設計指針を提供する。
English
This study experimentally demonstrates that ammonia diffusion combustion achieves near-zero N2O and unburned NH3 emissions, and reduces NOx emissions by over 60% compared to premixed combustion. The clean combustion is attributed to polymerization reactions in high-temperature rich-burn regions, providing design principles for cleaner ammonia engines.
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
日本ではアンモニアを水素キャリアや火力発電燃料として活用する動きが進んでおり、本研究成果は船舶や産業用エンジンでのアンモニア直接利用に寄与する。GX実現に向けたアンモニア燃焼技術の実用化に重要な知見を提供する。
In the global GX context
This work directly addresses the challenge of clean ammonia combustion for heavy-duty transport and power generation. It provides a fundamental understanding that can guide the design of ammonia engines, which is a critical part of the global hydrogen-ammonia supply chain for decarbonization.
👥 読者別の含意
🔬研究者:Provides detailed mechanism of clean ammonia diffusion combustion, valuable for combustion engineers and scientists.
🏢実務担当者:Offers design principles for low-emission ammonia engines, applicable to engine manufacturers and fuel system developers.
🏛政策担当者:Supports policy for ammonia as a decarbonization fuel by demonstrating its clean combustion potential and emission reductions.
📄 Abstract（原文）
<title>Abstract</title> <p> Ammonia is a major carbon-free alternative fuel for decarbonizing internal combustion engines, and ammonia direct-injection diffusion combustion represents a promising approach for its utilization. The experimental results demonstrate that ammonia diffusion combustion yields near-zero N <sub>2</sub> O and unburned NH <sub>3</sub> emissions. The ultra-low unburned NH <sub>3</sub> emissions are attributed to the difficulty of ammonia slip from the diffusion flames. The ultra-low N <sub>2</sub> O emissions result from the significant suppression of N <sub>2</sub> O generation in high-temperature flames. Ammonia diffusion combustion can also achieve low NOx emissions while maintaining high combustion efficiency and low N <sub>2</sub> O emissions. The NOx emissions of ammonia diffusion combustion are reduced by more than 60% compared to ammonia premixed combustion with high combustion efficiency. The primary reason for the low NOx emissions of ammonia diffusion combustion is that a significant portion of the combustion occurs in fuel-rich conditions, where NOx generation is strongly suppressed. These findings demonstrate and interpret the advantages of ammonia diffusion combustion, as depicted by the proposed ammonia diffusion flame conceptual model. Furthermore, this work reveals the clean combustion feature in rich-burn ammonia flames, where both NOx and N <sub>2</sub> O generation are significantly suppressed. The chemical reactions in the high-temperature rich-burn region strongly tend towards the polymerization pathway, which represents a clean combustion route. This finding provides important implications for the design principles of cleaner ammonia engines. </p>
🔗 Provenance — このレコードを発見したソース
- Research Square https://doi.org/10.21203/rs.3.rs-9586802/v1first seen 2026-06-04 04:23:35
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