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The Effect of Hydrogen Addition on Low-Temperature Combustion of Light Hydrocarbons and Alcohols

Author

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  • Fekadu Mosisa Wako

    (Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Università di Bologna, via Terracini 28, 40131 Bologna, Italy)

  • Gianmaria Pio

    (Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Università di Bologna, via Terracini 28, 40131 Bologna, Italy)

  • Ernesto Salzano

    (Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Università di Bologna, via Terracini 28, 40131 Bologna, Italy)

Abstract

Hydrogen is largely considered as an attractive additive fuel for hydrocarbons and alcohol-fueled engines. Nevertheless, a complete understanding of the interactions between blended fuel mechanisms under oxidative conditions at low initial temperature is still lacking. This study is devoted to the numerical investigation of the laminar burning velocity of hydrogen–hydrocarbon and hydrogen–alcohol fuels under several compositions. Estimations were compared with experimental data reported in the current literature. Additionally, the effects of hydrogen addition on engine performance, NO X , and other pollutant emissions of the mentioned fuels have been thermodynamically analyzed. From the study, it has been observed that the laminar burning velocity of the fuel mixtures increased with increasing hydrogen fractions and the peak value shifted to richer conditions. Besides, hydrogen fraction was found to increase the adiabatic flame temperatures eventually favoring the NO X formation for all fuel blends except the acetylene–hydrogen–air mixture where hydrogen showed a reverse effect. Besides, hydrogen is also found to improve the engine performances and helps to surge thermal efficiency, improve the combustion rate, and lessen other pollutant emissions such as CO, CO 2 , and unburned hydrocarbons. The model predicted well and in good agreement with the experimental data reported in the recent literature.

Suggested Citation

  • Fekadu Mosisa Wako & Gianmaria Pio & Ernesto Salzano, 2020. "The Effect of Hydrogen Addition on Low-Temperature Combustion of Light Hydrocarbons and Alcohols," Energies, MDPI, vol. 13(15), pages 1-14, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3808-:d:389642
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    References listed on IDEAS

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    3. Maria Mitu & Domnina Razus & Volkmar Schroeder, 2021. "Laminar Burning Velocities of Hydrogen-Blended Methane–Air and Natural Gas–Air Mixtures, Calculated from the Early Stage of p ( t ) Records in a Spherical Vessel," Energies, MDPI, vol. 14(22), pages 1-16, November.

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