Hydrogen–Natural Gas Blends in Combined Heat and Power Systems: A Comprehensive Review of Energy Performance, Emission Characteristics, and Integration Challenges
水素・天然ガス混合燃料を用いた熱電併給システム：エネルギー性能、排出特性、統合の課題に関する包括的レビュー (AI 翻訳)
Cătălina Dobre, Mihaela Constantin
🤖 gxceed AI 要約
日本語
このレビュー論文は、水素を天然ガスに混合した燃料（H2NG）を熱電併給（CHP）システムに用いる研究をまとめている。5～20%の水素混合が燃焼効率とCO2削減に最適である一方、NOx排出増加の課題も指摘。再生可能エネルギーとのハイブリッドやリーンバーン運転による対策を考察し、低炭素分散型エネルギーへの移行を支援する。
English
This review consolidates studies on hydrogen-enriched natural gas (H2NG) in CHP systems, finding that 5-20% hydrogen improves efficiency and reduces CO2 but increases NOx. It examines mitigation strategies like lean-burn and hybrid renewable integration, supporting H2NG as a transitional step to fully hydrogen-powered CHP.
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
日本では水素基本戦略のもと、水素混焼ガスタービンやコージェネレーションの導入が進められている。本レビューは、水素混合率の最適範囲（5-20%）やNOx対策について実用的知見を提供し、日本の分散型エネルギーシステムの低炭素化に貢献する。
In the global GX context
Globally, hydrogen blending in natural gas infrastructure is a key transition strategy. This review provides a comprehensive assessment of H2NG in CHP, highlighting optimal blend ratios and technical challenges, which is relevant for countries like the EU and US pursuing hydrogen in power generation.
👥 読者別の含意
🔬研究者:Provides a consolidated overview of H2NG-CHP research, useful for identifying gaps and optimization strategies.
🏢実務担当者:Offers insights on operational parameters (blend ratio, lean-burn) for CHP plant operators considering hydrogen retrofits.
🏛政策担当者:Informs on the feasibility and environmental trade-offs of hydrogen blending in CHP for energy policy planning.
📄 Abstract（原文）
The decarbonization of energy systems has intensified interest in hydrogen-enriched natural gas (H2NG) as a transitional fuel for combined heat and power (CHP) units and micro-CHP systems. This review consolidates experimental and numerical studies that explore the energy, environmental, and techno-economic implications of H2NG blends in CHP applications. Research conducted over the last decade highlights that enriching natural gas with hydrogen extends the flammability limits, enhances combustion stability, and reduces CO2 and CO emissions, while maintaining or improving electrical efficiency. However, these benefits are accompanied by higher NOx formation under stoichiometric conditions, which can be mitigated by operating under lean-burn regimes. The review further examines hybrid solutions that integrate electrolyzers, photovoltaic systems, and oxygen-enriched combustion to improve system flexibility and sustainability. The findings consistently show that moderate hydrogen fractions (5–20% vol.) provide optimal trade-offs between efficiency gains and emission control, supporting the role of H2NG as an intermediate step toward fully hydrogen-powered CHP technologies. Technical challenges related to ignition control, thermal recovery efficiency, and infrastructure adaptation are also discussed, along with emerging strategies for techno-economic optimization. This comprehensive assessment contributes to understanding how hydrogen blending can accelerate the transition to low-carbon, distributed energy systems.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/eng7070312first seen 2026-07-20 04:43:03
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