A comparison of the emission and impingement heat transfer of LPG-H2and CH4-H2premixed flames

H. S. Zhen, Chun Shun Cheung, Chun Wah Leung, Yat Sze Choy

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)


Experiments were performed to add hydrogen to liquefied petroleum gas (LPG) and methane (CH4) to compare the emission and impingement heat transfer behaviors of the resultant LPG-H2-air and CH4-H2-air flames. Results show that as the mole fraction of hydrogen in the fuel mixture was increased from 0% to 50% at equivalence ratio of 1 and Reynolds number of 1500 for both flames, there is an increase in the laminar burning speed, flame temperature and NOxemission as well as a decrease in the CO emission. Also, as a result of the hydrogen addition and increased flame temperature, impingement heat transfer is enhanced. Comparison shows a more significant change in the laminar burning speed, temperature and CO/NOxemissions in the CH4flames, indicating a stronger effect of hydrogen addition on a lighter hydrocarbon fuel. Comparison also shows that the CH4flame at α = 0% has even better heat transfer than the LPG flame at α = 50%, because the longer CH4flame configures a wider wall jet layer, which significantly increases the integrated heat transfer rate.
Original languageEnglish
Pages (from-to)10947-10955
Number of pages9
JournalInternational Journal of Hydrogen Energy
Issue number14
Publication statusPublished - 1 Jul 2012


  • Flame impingement heat transfer
  • Hydrocarbon-hydrogen fuel
  • Pollutant emissions

ASJC Scopus subject areas

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

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