Unburnt carbon and ashing behavior for slow burning of lignite under oxygen-enriched combustion conditions


Haykiri-Acma H. , Cekic Y., Yaman S.

Energy Sources, Part A: Recovery, Utilization and Environmental Effects, vol.41, no.11, pp.1326-1335, 2019 (Journal Indexed in SCI Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 41 Issue: 11
  • Publication Date: 2019
  • Doi Number: 10.1080/15567036.2018.1548511
  • Title of Journal : Energy Sources, Part A: Recovery, Utilization and Environmental Effects
  • Page Numbers: pp.1326-1335
  • Keywords: Lignite, oxygen-enriched combustion, unburnt carbon, mineralogy, slow burning, PULVERIZED COAL COMBUSTION, FUEL COMBUSTION, DEPOSITION, TECHNOLOGY, PARTICLES, CO2-O-2, AR-O-2

Abstract

© 2018, © 2018 Taylor & Francis Group, LLC.Oxygen-enriched combustion of coal has so far been investigated using either entrained flow reactors or fluidized-bed combustors where burning takes place rapidly due to high heating rates. On the contrary, this paper presents the results of slow burning of coal under oxygen-enriched combustion conditions. Ashing behavior of mineral matter-rich low-rank coal from Turkish Tekirdag-Malkara lignite under oxygen-enriched conditions was investigated to determine the effect of this combustion technique on unburnt carbon, mineralogical characteristics and the burning performance. These experiments showed that the influence of O2 concentration on ashing is much more evident than the temperature during oxygen-enriched combustion.