水素使用が天然ガス・水素混合燃焼プロセスの特性に及ぼす影響
Effect of hydrogen use on the characteristics of a natural gas and hydrogen combustion process (原題)
Otero, Maria, Sedano, Camilo Andres, Lopez Mejia, Omar D.
🤖 gxceed AI 要約
日本語
本研究は、天然ガスと水素の混合燃焼をCFDで解析し、水素添加がCO、CO2、NOx排出に与える影響を調査した。実験データと検証したモデルを用い、15%、30%、45%の水素混焼・再燃モードを比較。結果、水素添加によりCO、CO2、NOxが減少し、ピーク火炎温度が上昇。最適な水素濃度は30%と判明。
English
This study uses CFD to analyze natural gas-hydrogen co-firing and reburn combustion, examining the effects of hydrogen addition on emissions. Validated against experiments, simulations with 15%, 30%, and 45% hydrogen show reduced CO, CO2, and NOx, with higher peak flame temperatures. The optimal hydrogen fraction is 30%.
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
日本の水素社会実現に向けた燃焼技術の知見を提供。水素混焼は既存インフラを活用した脱炭素策として注目され、本研究成果は国内の水素サプライチェーン構築や火力発電の低炭素化に貢献する。
In the global GX context
This research contributes to global hydrogen co-firing knowledge, relevant for decarbonizing gas turbines and industrial burners. It offers empirical data for policy on hydrogen blending limits and technology optimization, supporting energy transition strategies.
👥 読者別の含意
🔬研究者:Provides validated CFD model and optimal hydrogen fraction for co-firing/reburn, useful for combustion research.
🏢実務担当者:Informs engineering decisions on hydrogen blending in burners for emission reduction.
🏛政策担当者:Offers evidence for setting hydrogen blending standards and promoting hydrogen use in power generation.
📄 Abstract（原文）
Purpose In recent years, the global energy transition has highlighted the need for sustainable fuel alternatives, with hydrogen emerging as a key option for reducing carbon emissions. As a carbon-free fuel, hydrogen offers strong potential when blended with conventional fuels. This study aims to investigate the combustion of natural gas–hydrogen mixtures in a vertical continuous-flow combustion chamber using computational fluid dynamics (CFD), with a focus on the effects of hydrogen addition. Design/methodology/approach The experimental setup consists of a co-firing and reburn chamber fuelled with natural gas at a heating power of 25 kW. The chamber includes a side exhaust duct and seven side ports, enabling six temperature measurements along its length and gas sampling. Axial and radial temperature profiles were recorded for three air–fuel mixtures, together with concentrations of CO, CO2, NOx and O2. A CFD model of non-premixed natural gas–air combustion was developed and validated against experimental data. Six additional simulations were performed for co-firing and reburn modes with hydrogen fractions of 15, 30 and 45%. Findings Results show that increasing hydrogen content reduces CO and CO2 emissions and lowers NOx levels compared to pure natural gas. Hydrogen addition also leads to higher peak flame temperatures and altered thermal distributions. Among the cases studied, the RB30 mixture provided the best overall performance, indicating an optimal hydrogen concentration of 30%. Originality/value The novelty of this work lies in a comparative analysis of cofiring and reburn operations in hydrogen-enriched natural gas combustion systems, rather than investigating only the combustion mode.
🔗 Provenance — このレコードを発見したソース
- base https://doi.org/10.1108/hff-10-2025-0764first seen 2026-09-01 12:08:07
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