Gasification of Coal–Water Compositions by Laser Pulses of Various Intensity

A. S. Zaitsev, R. I. Egorov, P. P. Tkachenko, M. V. Belonogov

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract: The paper analyzes the processes occurring on the interaction of high-power nanosecond laser pulses with a coal–water mixture prepared from gas-coal waste. It was found that the rate of production of a mixture of CO and H 2 sharply increased at a laser radiation intensity higher than 8 J/cm 2 . This was expressed in a sharp increase in the concentration of the combustible components of synthesis gas (CO, up to 0.57 vol %) and in a noticeable acceleration of the growth of the mass of a gas–aerosol fuel mixture upon the absorption of laser pulses (by 40%). At low pulse energy densities, the generation of a finely dispersed (particle size, 30–70 μm) fuel aerosol was a predominant process. Gasification came into play above the effective ablation threshold when the weight ratio between synthesis gas and the sprayed aerosol reached 1 : 3. Thus, the action of laser pulses makes it possible to convert coal preparation wastes into a highly flammable gas–aerosol fuel mixture.

Original languageEnglish
Pages (from-to)48-53
Number of pages6
JournalSolid Fuel Chemistry
Volume53
Issue number1
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • aerosol
  • coal–water slurry
  • gasification
  • laser
  • synthesis gas
  • waste utilization

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology

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