Experimental and Numerical Study of the Laminar Burning Velocity of Biogas–Ammonia–Air Premixed Flames

Pierre Brequigny (), Adnane Soulé, Christine Mounaïm-Rousselle, Guillaume Dayma and Fabien Halter
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Pierre Brequigny: PRISME, University Orléans, INSA-CVL, F-45072 Orléans, France
Adnane Soulé: PRISME, University Orléans, INSA-CVL, F-45072 Orléans, France
Christine Mounaïm-Rousselle: PRISME, University Orléans, INSA-CVL, F-45072 Orléans, France
Guillaume Dayma: CNRS-ICARE, University Orléans, F-45072 Orléans, France
Fabien Halter: CNRS-ICARE, University Orléans, F-45072 Orléans, France

Energies, 2024, vol. 17, issue 2, 1-13

Abstract: Biogas is a gas resulting from the digestion of biomass, which means transforming organic waste into energy. It is composed essentially of methane (CH 4 ) and carbon dioxide (CO 2 ) and can also contain ammonia (NH 3 ) as an impurity. Biogas is generally used to generate electricity or produce heat in a cogeneration system. With the renewed interest in ammonia and the increasing development of biogas caused by the urge for an energetic transition, those two carbon-neutral fuels are being investigated as a mixture in this study through the laminar burning velocity (LBV). In this paper, the LBV of biogas ammonia air mixtures are investigated experimentally for the first time over a wide range of equivalence ratios and ammonia concentrations. The biogas studied was 60% CH 4 and 40% CO 2 in volume. The NH 3 concentration in the fuel varied from 0 to 50% vol. while the equivalence ratio varied from 0.8 to 1.2. The experiments were conducted at constant pressure in a constant volume vessel at 300 K and 1 bar. Adding ammonia to biogas decreases the LBV while the Markstein length is not very sensitive to ammonia addition. The CEU-NH3-Mech-1.1 and Okafor mechanisms show good agreement with the experimental laminar burning velocity. The effect of radiative heat losses on the measurement is also investigated.

Keywords: biogas; ammonia; premixed combustion; laminar burning velocity (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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