Fundamental understanding of ammonia blend flame chemistry using wall-stabilised configurations

Kovaleva, Marina ORCID: https://orcid.org/0000-0002-6516-3658 2024. Fundamental understanding of ammonia blend flame chemistry using wall-stabilised configurations. PhD Thesis, Cardiff University. Item availability restricted.

	PDF - Accepted Post-Print Version Restricted to Repository staff only until 10 December 2025 due to copyright restrictions. Download (39MB)
	PDF (Cardiff University Electronic Publication Form) - Supplemental Material Restricted to Repository staff only Download (8MB)

Abstract

Pollution resulting from human activities has initiated the effects of global warming and poses a significant threat to our planet. To address this issue, there is increasing interest in promoting the use of alternative fuels that do not produce carbon dioxide, such as hydrogen and ammonia. Ammonia is a promising energy carrier, with combustion challenges that can be mitigated by blending with more reactive fuels such as methane and hydrogen or by partially cracking ammonia to produce ammonia/hydrogen/nitrogen blends. To understand the fundamental emission characteristics of these blends, ammonia/ methane, ammonia/hydrogen, and ammonia/hydrogen/nitrogen flames were investigated using a premixed, laminar, burner-stabilised stagnation flame at room temperature and atmospheric pressure. A chemistry analysis was conducted to investigate the underlying emission characteristics in relation to changes in blend and equivalence ratio. A further numerical analysis characterised the role of mass diffusion and flame-wall interaction in the context of these emissions. This work provides a valuable dataset for developing ammonia reaction kinetics, understanding of ammonia combustion emissions, and clarification of ammonia/ methane chemistry interactions. However, further work is needed to gather ammonia flame emissions data at high pressure and high temperature conditions, and to understand the role of surface chemistry, radiation and other harmful hydrocarbon-based emissions resulting from ammonia/methane flames.

Item Type:	Thesis (PhD)
Date Type:	Completion
Status:	Unpublished
Schools:	Engineering
Uncontrolled Keywords:	Burner-stabilised stagnation flame; impinging jet flame; emissions; ammonia; hydrogen; nitrous oxide
Date of First Compliant Deposit:	11 December 2024
Last Modified:	12 Dec 2024 11:26
URI:	https://orca.cardiff.ac.uk/id/eprint/174649

Actions (repository staff only)

Edit Item