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Proceedings of the Combustion Institute
Article . 2023 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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MILD Combustion of Methanol, Ethanol and 1-Butanol binary blends with Ammonia

Authors: Ariemma, Giovanni Battista; Sorrentino, Giancarlo; Sabia, Pino; Ragucci, Raffaele; de Joannon, M.;

MILD Combustion of Methanol, Ethanol and 1-Butanol binary blends with Ammonia

Abstract

In the present energy transition scenario, ammonia is considered a valuable candidate as energy-dense carrier with neutral or even negative carbon balance. However, the potential high NOx emissions and the reduced oxidation process stability, at least when conventional combustion plants are used, can burden its wide utilization on large scales. In this context, MILD Combustion, due to its inherent characteristics, may greatly improve combustion stability and keep the NOx emissions at an acceptable level. On the other hand, the addition of low or no-carbon fuels from biomasses and wastes, more reactive than ammonia, may be beneficial in further improving its combustion performance and the global sustainability of the energy supply chain. In this respect, the present work analyzes the sustainability and combustion performance of binary mixtures of ammonia and low-molecular-weight alcohols in a cyclonic burner, where MILD conditions are attained by means of a strong internal recirculation, and compares them with those obtained with NH3/methane blends. Results highlighted that NH3/alcohols mixtures ensure a stable oxidation process in a wide range of operational parameters without compromising the system performance. Moreover, they showed a significant reduction of NOx emissions for NH3/alcohols mixtures, especially for fuel-lean conditions, when compared to NH3/methane blends. Experimental data were also corroborated by chemical kinetic modeling results to provide some insights on the peculiar NOx formation routes when blends of different nature are used, highlighting the interaction between carbon and nitrogen fuels kinetics.

Country
Italy
Keywords

Low carbon, Zero net CO2 emissions, NOx, Diluted combustion, Energy carriers

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
36
Top 10%
Top 10%
Top 1%