Influence of feed and sampling systems on element partitioning in Kentucky fly ash

Bruno V. Valentim, James C. Hower

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Pentannual surveys of the production of coal combustion byproducts in Kentucky utility power plants, along with other studies in the intervening years has resulted in a large amount of data relating coal chemistry, fly ash (FA) chemistry, and, to a lesser degree, bottom ash chemistry. Therefore, this important collection of data enables to perform studies on a wide variety of fly ash types. The chemical classification, based on major oxides (acid, alkaline, and Fe2O3), of coal high-temperature ash (HTA) and FA from Kentucky Power Plants shows that the majority of the coal HTAs are Sialic, Sialic-Ferrisialic, and Ferrisialic. The FA classification not only depends of the coal HTA chemistry but also the ash-collection system and the sampling position, with the implications of flue gas temperature and ash particle size, within the system.

Original languageEnglish
Pages (from-to)94-104
Number of pages11
JournalInternational Journal of Coal Geology
Issue number1-2
StatePublished - May 2010

Bibliographical note

Copyright 2011 Elsevier B.V., All rights reserved.


  • Chemical classification
  • Coal
  • Fly ash
  • Variation

ASJC Scopus subject areas

  • Fuel Technology
  • Geology
  • Economic Geology
  • Stratigraphy


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