Numerical investigation of the NOX emissions of a perfectly premixed NH3-H2 flame at moderate pressure levels

Meloni, R., Valera Medina, A. ORCID: https://orcid.org/0000-0003-1580-7133, Babazzi, G., Pucci, E., Castellani, S. and Andreini, A. 2025. Numerical investigation of the NOX emissions of a perfectly premixed NH3-H2 flame at moderate pressure levels. Fuel: The Science and Technology of Fuel and Energy 385 , 134128. 10.1016/j.fuel.2024.134128

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Abstract

Blends of green hydrogen-ammonia for Gas Turbines (GT) are gaining more and more interest, as their carbon neutrality can abate CO2 emissions. Such fuel mixture could be particularly effective since the low reactivity of ammonia can compensate the aggressive properties of hydrogen in terms of both flame speed and low heating value, reducing the re-design effort of the traditional dry-low emission combustors. From the environmental perspective, the main drawback is represented by the NOx emissions, mostly related to the fuel-bound pathway activated by the cracking of NH3: its mitigation requires the proper control of the equivalence ratio of the blend along the selected ratio of ammonia and hydrogen in the fuel mixture. Additionally, at relevant GT conditions, a moderate benefit for NOx reduction can be played by the pressure rise.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Elsevier
ISSN:	0016-2361
Date of First Compliant Deposit:	7 January 2025
Date of Acceptance:	15 December 2024
Last Modified:	15 Jan 2025 12:30
URI:	https://orca.cardiff.ac.uk/id/eprint/175051

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