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国际清洁环境能源期刊

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ISSN 打印: 2150-3621

ISSN 在线: 2150-363X

SJR: 0.597 SNIP: 1.456 CiteScore™:: 3.7 H-Index: 18

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NOx FORMATIONS IN DILUTED CH4/H2 COUNTERFLOW DIFFUSION FLAMES

卷 4, 册 4, 2003, 12 pages
DOI: 10.1615/InterJEnerCleanEnv.v4.i4.20
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摘要

Flames of methane and hydrogen mixtures (hythane) are studied in a counterflow burner. Measurements of temperature and NO profiles are taken and compared to numerical computations. At a constant strain rate of 100 s–1, three series of fuel compositions varying from 0% to 100% H2 in CH4 are run. Flame peak temperatures are kept constant for each series at 1840 K, 1940 K, and 2040 K, by varying diluent fractions in the fuel stream from 19 to 71 vol% N2. The temperatures are kept constant to eliminate the effect of varying thermal NO production with varying temperatures and, thus, we can study the chemical effect of having both fuels present. The measured values of NO range from 5.9 to 80.9 ppm. Good comparisons to numerical computations are found for the lowertemperature flames for each pure fuel, while there are some deviations for the hottest flames. Lower NO results are obtained in the experiments compared to the numerical computations for the mixture of both fuels. The results show that mixing H2 into CH4 will increase NO emissions versus burning them alone and diluted.

对本文的引用
  1. Wu Long, Kobayashi Noriyuki, Li Zhanyong, Huang Hongyu, Li Jun, Emission and heat transfer characteristics of methane–hydrogen hybrid fuel laminar diffusion flame, International Journal of Hydrogen Energy, 40, 30, 2015. Crossref

  2. Stagni A., Frassoldati A., Cuoci A., Faravelli T., Ranzi E., Skeletal mechanism reduction through species-targeted sensitivity analysis, Combustion and Flame, 163, 2016. Crossref

  3. Naha Sayangdev, Aggarwal Suresh K., Fuel effects on NOx emissions in partially premixed flames, Combustion and Flame, 139, 1-2, 2004. Crossref

  4. Jiang Yuanjie, Gruber Andrea, Seshadri Kalyanasundaram, Williams Forman, An updated short chemical‐kinetic nitrogen mechanism for carbon‐free combustion applications, International Journal of Energy Research, 44, 2, 2020. Crossref

  5. Bouziane A., Alami A., Zaitri M., Bouchame B., Bouchetara M., Investigation of Swirl Stabilized CH4 Air Flame with Varied Hydrogen Content by using Computational Fluid Dynamics (CFD) to Study the Temperature Field and Flame Shape, Engineering, Technology & Applied Science Research, 11, 2, 2021. Crossref

  6. Kim Donghee, Park Jinje, Huh Kang Y., Lee Youngjae, Oxygen‐enriched flameless combustion of CH 4 / H 2 / CO mixtures , International Journal of Energy Research, 46, 4, 2022. Crossref

  7. Park Jinje, Kim Donghee, Lee Youngjae, Experimental study on flameless combustion and NO emission with hydrogen‐containing fuels , International Journal of Energy Research, 46, 3, 2022. Crossref

  8. Wright Madeleine L., Lewis Alastair C., Emissions of NOx from blending of hydrogen and natural gas in space heating boilers, Elementa: Science of the Anthropocene, 10, 1, 2022. Crossref

  9. Stagni Alessandro, Frassoldati Alessio, Pelucchi Matteo, Faravelli Tiziano, Chemistry of nitrogen oxides (NOx) formation in flameless combustion, in Fundamentals of Low Emission Flameless Combustion and Its Applications, 2022. Crossref

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