Petrographic observations of Gieseler semi-cokes from high volatile bituminous coals

James C. Hower, William G. Lloyd

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Semi-cokes from Gieseler plastometry experiments on high volatile bituminous coals conducted under both ASTM 2639 (3°C/min temperature ramp) and isothermal conditions, the latter run at both varied temperatures and at fixed times at a single temperature, were studied for their optical texture. There is some relationship between semi-coke texture and coal rank, with semi-cokes from higher rank coals showing a greater tendency towards the development of a flow texture and, in certain cases, the progression from isotropic to anisotropic semi-coke. Increases in both time and temperature promote a similar tendency towards the development of a flow texture and, in the case of an eastern Kentucky coal, the progression from isotropic to anisotropic semi-coke. Vitrinite types with a greater initial organic sulfur content exhibit flow textures at shorter times than comparatively low-sulfur vitrinite.

Original languageEnglish
Pages (from-to)445-451
Number of pages7
JournalFuel
Volume78
Issue number4
DOIs
StatePublished - Mar 1999

Keywords

  • Coals
  • Semi-cokes
  • Vitrinite

ASJC Scopus subject areas

  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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