Effects of CH4 Content on NO Formation in One-Dimensional Adiabatic Flames Investigated by Saturated Laser-Induced Fluorescence and CHEMKIN Modeling

Research output: Contribution to journalArticle

Abstract

Experiments applying saturated laser-induced fluorescence (LSF) technology were performed focusing on the influence of equivalence ratio, syngas mixture contents, on NO formation in H2/CO/CH4/CO2/N2/O2 premixed flat flames supplied by a heat flux burner. Experimental data were extracted to validate calculation by CHEMKIN software. Both experiments and CHEMKIN calculation draw one conclusion that NO mole fraction in CH4-air flame peaks at stoichiometric and φ1.3, due to thermal NO and prompt NO routes. All mechanisms applied can well-predict the NO mole fraction at the fuel lean side but failed at the fuel rich side. NO mole fraction in syngas flame is propotional to CH4 ratio as shown in the experimental data, but all the mechanisms failed to predict it with some even having a wrong tendency. A rate of NO production and sensitivity analysis suggests that thermal and prompt NO routes play different roles in each mechanism, and modifications to mechanisms are required to improve NO concnetration predictions at CH4-containing syngas flame.

Details

Authors
  • Yajun Zhou
  • Zhihua Wang
  • Yong He
  • Ronald Whiddon
  • Dongxiang Xu
  • Zhongshan Li
  • Kefa Cen
Organisations
External organisations
  • Zhejiang University
  • Lund University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering
Original languageEnglish
Pages (from-to)3154-3163
Number of pages10
JournalEnergy and Fuels
Volume31
Issue number3
Publication statusPublished - 2017 Mar 16
Publication categoryResearch
Peer-reviewedYes