Experimental study on the combustion and no x emission characteristics of DME/LPG blended fuel using counterflow burner

Dongjo Lee, Jae Seong Lee, Ho Young Kim, Chul Kyun Chun, Scott C. James, Sam S. Yoon

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Dimethyl ether (DME) continues to be considered as an alternative fuel to conventional hydrocarbon fuels. Specifically, DME has been considered as a substitute fuel for liquefied petroleum gas (LPG) because the physical and chemical characteristics of DME are similar to those of LPG. However, the combustion performance for DME has not yet been established. In this study, the combustion and NOx-emission characteristics of LPG, DME, and an LPG/DME-blended fuel were experimentally investigated in a counterflow nonpremixed flame. The flame structure, flame temperature, NOx concentration, and distribution of OH radicals are reported. In this experimental study, the types of LPG used were butane 100%, butane 80%+propane 20%, and butane 75%+propane 25% by mass with DME mole fraction varied from 0 to 100 mole%. The experimental results indicated that the combustion and NOx emission characteristics of LPG fuels varied with the DME mole fraction. As the DME mole fraction increased, the flame thickness increased, but the flame length decreased. Also, the flame became wider, and its origin moved closer to the oxidizer nozzle with increasing DME mole fraction. In addition, as the DME mole fraction increased, the maximum flame temperature increased due to fast pyrolysis of DME as a result of the high oxygen content (∼35% by mass) in DME. Moreover, NOx concentration decreased with increasing DME mole fraction in all LPGs.

Original languageEnglish
Pages (from-to)97-113
Number of pages17
JournalCombustion Science and Technology
Issue number1
Publication statusPublished - 2012 Jan 1


  • Counterflow burner
  • DME/LPG blended fuel
  • Distribution of OH radicals
  • NOx emission
  • Nonpremixed flame

ASJC Scopus subject areas

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


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