Experimental and numerical study on the emission characteristics of laminar premixed biogas-hydrogen impinging flame

Z. L. Wei, H. S. Zhen, Chun Wah Leung, Chun Shun Cheung, Z. H. Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

The NO amount produced via different routes (thermal, prompt, NNH and N2O routes) were isolated and calculated in the simulation. The effects of separated distance and equivalence ratio on the emission formation were discussed quantitatively. The results are summarized as follows. The lower values of EICO at small and large H are caused by the weakened fuel oxidization and improved CO oxidization, respectively, and the EICO is increased with ϕ owing to the increasingly incomplete fuel oxidization. The NO amounts of thermal, prompt, NNH and N2O routes and their contributions on total NO are affected considerably by the separated distance. The decreased prompt NO with H leads to the initial drop of EINOx at fuel-rich condition. The thermal NO and NNH route dominate the NO formation at ϕ = 0.8 and 1.0, while the contribution of prompt NO is improved significantly at fuel-rich condition. The rising trend of EINOx with ϕ is primarily predominated by the enhanced prompt NO. As H is enhanced, the rising and dropping trends of EINO2, as well as NO2/NOx ratio, are caused by more intensive air entrainment, promoting the NO2formation, and the extended high temperature region, accelerating the NO formation and the NO2destruction, respectively. The enhanced EINO2with ϕ is primarily caused by the increased H atom in the air mixing region to promote the HO2formation.
Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalFuel
Volume195
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Biogas-hydrogen fuel
  • Flame impingement
  • NO formation
  • NO production 2
  • Total emissions

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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