Nitric oxide formation in H2/CO syngas non-premixed jet flames

K.K.J. Ranga Dinesh, E.S. Richardson, J.A. van Oijen, K.H. Luo, X. Jiang

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


Direct numerical simulations (DNS) of high hydrogen content (HHC) syngas nonpremixed jet flames have been carried out to study the nitric oxide (NO) formation. The detailed chemistry employed is the GRI 3.0 updated with the influence of the NCN radical chemistry using flamelet generated manifolds (FGM). Preferential diffusion effects have been considered via FGM tabulation and the progress variable transport equation. The results indicate a strong correlation between the flame temperature and NO concentration for pure H2 flame, in which NO formation is characterised by the thermal and NNH mechanisms. The results also indicate a rapid decrease of maximum NO values in the syngas mixtures due to lower temperatures associated with the CO-dilution into H2, thereby increasing the contribution of the prompt-NO mechanism via CH radicals.

Original languageEnglish
Title of host publicationThe 12th International Conference on Combustion & Energy Utilisation, 12ICCEU 
Place of PublicationAmsterdam
Number of pages4
Publication statusPublished - 2015
Event23rd International Conference on the Application of Accelerators in Research and Industry, CAARI 2014 - San Antonio, United States
Duration: 25 May 201430 May 2014

Publication series

NameEnergy Procedia


Conference23rd International Conference on the Application of Accelerators in Research and Industry, CAARI 2014
CountryUnited States
CitySan Antonio


  • Direct Numerical Simulation
  • NCN chemistry
  • NO mechanism
  • Preferential Diffusion
  • Syngas

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