Effects of ammonia substitution on explosion limits of methane

Guo, Yanze, Chen, Aiguo, Deng, Xi, Huang, Zan, Li, Jun, Ying, Wenxuan, Ma, Xiuhua, Nie, Yuhong, Chen, Guansheng and Xiao, Hua 2023. Effects of ammonia substitution on explosion limits of methane. Journal of Ammonia Energy 1 (1) , pp. 83-90. 10.18573/jae.9

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Abstract

As a hydrogen-rich and carbon-free fuel, ammonia is regarded as a promising carrier and storage medium for clean energy. By mixing methane with ammonia, the emission of carbon dioxide is also significantly reduced, which is of great significance for reducing greenhouse gas emissions and protecting the environment. However, ignition studies of ammonia/methane mixtures are still limited. In this paper, by means of numerical simulation with detailed chemical reaction mechanism, the effect of ammonia replacing methane on combustion was analyzed. Characteristics of explosion limit under different temperature (750-850K), equivalent ratio (0.5, 1.0 and 2.0) and ammonia mixing ratio (0-90%) were studied. The results show that the explosion limit decreases with the increase of temperature and equivalence ratio. When the proportion of NH3 is around 10%, the explosion limit shows a turning point. When the mole fraction of NH3 is higher than 50%, the explosion limit shows obvious increasing tendency with ammonia addition. Moreover, sensitivity and rate of production were also analyzed to expand the understanding of explosion limit for premixed ammonia-methane fuel blends.

Item Type:	Article
Date Type:	Publication
Status:	Published
Publisher:	Cardiff University Press
ISSN:	2752-7735
Funders:	Scientific Research Capacity Improvement Project of Key Construction Discipline of Guangdong Province, 2023 Basic and Applied Basic Research Project of Guangzhou Municipal Bureau of Science and Technology
Date of First Compliant Deposit:	13 November 2023
Date of Acceptance:	30 May 2023
Last Modified:	13 Nov 2023 13:16
URI:	https://orca.cardiff.ac.uk/id/eprint/163847

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