Emission of impinging biogas/air premixed flame with hydrogen enrichment

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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)


Overall pollutants emission from impinging premixed and diffusion flames were measured by investigating its dependence on burner-plate separation distance, fraction of hydrogen in the biogas-hydrogen mixture, Reynolds number and equivalence ratio. Results show that premixed flame is cleaner with both low CO and NOxemissions than diffusion flame, either under open or impingement conditions. Impinging flame emits more CO while less NOxthan the corresponding open flame. For both premixed and diffusion flames, CO emission firstly increases at separation distance of H < 15 mm and then decreases at H > 15 mm. While NOxemission monotonically increases with H. NOxemission also increases with fraction of hydrogen, equivalence ratio and Reynolds number, due to its dependence on both temperature and volume of the flame. The lowest CO emission occurs at the slightly rich condition at equivalence ratio of 1.2. This low CO emitting behavior is favorable for cooking applications, where slightly fuel rich flames are adopted.
Original languageEnglish
Pages (from-to)2087-2095
Number of pages9
JournalInternational Journal of Hydrogen Energy
Issue number3
Publication statusPublished - 21 Jan 2016


  • CO/NO emissions x
  • Flame impingement
  • Pollutants emission

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


Dive into the research topics of 'Emission of impinging biogas/air premixed flame with hydrogen enrichment'. Together they form a unique fingerprint.

Cite this