 Insight into NOx formation characteristics of ammonia oxidation in N2 and H2O atmospheresGuodong Shi, Pengfei Li, Kesheng Li, Fan Hu, Qian Liu, Haoyu Zhou and Zhaohui Liu Energy, 2023, vol. 285, issue C Abstract: For the practical combustion of ammonia (NH3) in air, ammonia jet entrains the combustion product inside the furnace, and the reaction zone is diluted with a significant amount of H2O; thus, the impact of H2O on NH3 oxidation cannot be ignored. In this study, NH3 oxidation was conducted under N2 and H2O atmospheres in a jet-stirred reactor. Experimental and numerical investigations were conducted to analyze the impact of various parameters, including the temperature, equivalence ratio, H2O volume fraction, and residence time. The NO formation is enhanced as T increases, while it is inhibited as Φ or XH2O increases. The N2O and NO concentrations are an order of magnitude when T ≤ 1375 K, and the peak N2O concentration occurs at T ≈ 1375 K and Φ = 0.5. The presence of 20 % H2O reduces NO and N2O concentrations by 61.5 % and 29.5 %, respectively, at Φ = 0.5 and T = 1375 K. To reduce NOx formation with an acceptable concentration of unburned NH3, the recommended operation condition of NH3 oxidation is obtained. This study presents a new underlying understanding of the formation of NOx during NH3 oxidation under N2 and H2O atmospheres. Keywords: NOx; Ammonia; H2O atmosphere; Jet-stirred reactor; N2O (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:285:y:2023:i:c:s0360544223028062 DOI: 10.1016/j.energy.2023.129412 Access Statistics for this article Energy is currently edited by Henrik Lund and Mark J. Kaiser More articles in Energy from Elsevier |
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