000170221 001__ 170221
000170221 005__ 20260407115449.0
000170221 0247_ $$2doi$$a10.1016/j.enconman.2026.121350
000170221 0248_ $$2sideral$$a148736
000170221 037__ $$aART-2026-148736
000170221 041__ $$aeng
000170221 100__ $$0(orcid)0000-0003-3157-6267$$aArroyo, Jorge
000170221 245__ $$aExperimental study on the combustion of methane-hydrogen mixtures in a pilot-scale furnace
000170221 260__ $$c2026
000170221 5060_ $$aAccess copy available to the general public$$fUnrestricted
000170221 5203_ $$aThis study examines hydrogen as a low-emission alternative to natural gas in industrial furnace combustion, focusing on its well-known benefits of reducing carbon emissions and the technical challenges it presents. While decreasing carbon-based emissions with increased hydrogen content is well documented and serves as a primary motivation for its adoption, this work investigates the broader implications, particularly the increase in nitrogen oxide emissions, a significant contributor to air pollution, due to elevated combustion chamber temperatures. Experimental tests were conducted in a pilot-scale industrial furnace equipped with a burner operating at 42 kW, using pure methane, pure hydrogen, and various hydrogen-methane blends, over air-excess ratios ranging from 1.0 to 1.6. Temperature, heat transfer, pollutants, and radical-species emissions during combustion were measured using thermocouples, gas analyzers, spectroscopy, and optical imaging. Across the investigated air-excess range, carbon dioxide emissions decreased progressively by 10.5%, 18.8%, 45.3%, and 100% as the hydrogen content increased from 25% to 100% (relative to pure methane). In contrast, average nitrogen oxide emissions were maintained for a mixture of 25% of hydrogen, while they increased up to 28.5% for the blend with a 75% hydrogen content (relative to pure methane). Pure-hydrogen operation resulted in higher nitrogen oxide emissions, but these were partially mitigated by operating under lean conditions. Overall, hydrogen-enriched combustion supports decarbonization but can increase nitrogen oxide emissions, highlighting an important trade-off. Chemiluminescence analysis and visual diagnostics using RGB and Ultraviolet imaging further highlighted the qualitative differences between methane and hydrogen flames, with important implications for flame monitoring, real-time diagnosis of fuel composition, and safety in hydrogen-fired systems. These findings improve understanding of hydrogen’s role in industrial decarbonization and motivate the development of combustion strategies tailored to effectively control nitrogen oxide emissions.
000170221 536__ $$9info:eu-repo/grantAgreement/ES/MCIU/CER-20211002
000170221 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc$$uhttps://creativecommons.org/licenses/by-nc/4.0/deed.es
000170221 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000170221 700__ $$aTovar-Lasheras, Fabiola
000170221 700__ $$0(orcid)0000-0002-0704-4685$$aGil, Antonia$$uUniversidad de Zaragoza
000170221 7102_ $$15004$$2590$$aUniversidad de Zaragoza$$bDpto. Ingeniería Mecánica$$cÁrea Máquinas y Motores Térmi.
000170221 773__ $$g356 (2026), 121350 [10 pp.]$$pEnergy convers. manag.$$tENERGY CONVERSION AND MANAGEMENT$$x0196-8904
000170221 8564_ $$s10039829$$uhttps://zaguan.unizar.es/record/170221/files/texto_completo.pdf$$yVersión publicada
000170221 8564_ $$s2506428$$uhttps://zaguan.unizar.es/record/170221/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000170221 909CO $$ooai:zaguan.unizar.es:170221$$particulos$$pdriver
000170221 951__ $$a2026-03-26-14:31:59
000170221 980__ $$aARTICLE