Evidence of the rich flammability limit for pulverized pittsburgh seam coal-air mixtures

Scott E. Slezak, Richard O. Buckius, Herman Krier

Research output: Contribution to journalArticlepeer-review

Abstract

Evidence for a rich flammability limit is presented for pulverized Pittsburgh seam coal (36% volatiles, 56.1% fixed carbon, 50 μm mass mean particle diameter). Experiments were conducted in a large (0.3 m diam by 4.5 m long) horizontal tube that generated a vertical dust concentration gradient for the rich mixtures. Horizontally propagating steady state flames were observed only in regions where the concentration was below 1.5 kg/m3. When the location where the dust concentration exceeded 1.5 kg/m3 was varied, the edge of the visible flame front moved accordingly. This is interpreted as evidence for a rich limit of 1.5 kg/m3 for this coal.

Original languageEnglish (US)
Pages (from-to)209-215
Number of pages7
JournalCombustion and Flame
Volume63
Issue number1-2
DOIs
StatePublished - 1986

ASJC Scopus subject areas

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

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