Chemical structure and laminar burning velocity of atmospheric pressure premixed ammonia/hydrogen flames

Ksenia N. Osipova, Oleg P. Korobeinichev, Andrey G. Shmakov

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents experimental data on the flame structure of laminar premixed ammonia and ammonia/hydrogen flames at different equivalence ratios (φ = 0.8, 1.0 and 1.2) and the laminar flame speed of ammonia/hydrogen flames (φ = 0.7–1.5) at 1 atm. Experimental data were compared with modeling results obtained using four detailed chemical-kinetic mechanisms of ammonia oxidation. In general, all models adequately predict the flame structure. However, for the laminar burning velocity, this is not so. The main nitrogen-containing species present in the post-flame zone in significant concentrations are N2 and NO. Experimental data and numerical simulations show that the transition to slightly rich conditions enables to reduce NO concentration. Numerical simulation indicate that increasing the pressure rise also results into reduction of NO formation. However, when using ammonia as a fuel, additional technologies should be employed to reduce NO formation.

Original languageEnglish
Pages (from-to)39942-39954
Number of pages13
JournalInternational Journal of Hydrogen Energy
Volume46
Issue number80
DOIs
Publication statusPublished - 18 Nov 2021

Keywords

  • Ammonia
  • Flame structure
  • Hydrogen
  • Laminar flame speed
  • Molecular beam mass spectrometry

OECD FOS+WOS

  • 2.07 ENVIRONMENTAL ENGINEERING
  • 1.04.HQ ELECTROCHEMISTRY
  • 2.07.ID ENERGY & FUELS

Fingerprint

Dive into the research topics of 'Chemical structure and laminar burning velocity of atmospheric pressure premixed ammonia/hydrogen flames'. Together they form a unique fingerprint.

Cite this