Attempts to produce blast furnace coke from Victorian brown coal. 4. Low surface area char from alkali treated brown coal

Mamun Mollah, Marc Marshall, Ying Qi, Gregory Knowles, Shah Taghavimoghaddam, Roy Jackson, Alan Chaffee

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Abstract

A Victorian brown coal (VBC) has been heated with strong aqueous KOH under severe conditions, neutralized with dilute H2SO4 and then hot-briquetted with or without coking coal tar pitch as a binder, optionally air cured and finally carbonized. The final products were evaluated as a blast furnace (BF) coke substitute. The least reactive final product had a much lower reactivity than the product obtained by carbonizing a hot-briquetted VBC-VBC tar mixture. Furthermore, the final product obtained from alkali treated coal had a surface area as low as that of a BF coke. However, the reactivity remained higher and the amount of graphitic structure lower than those of a BF coke. In addition, although the coal/coal-binder mixture, like coking coal, appeared to have fused during carbonization, the final products had virtually no meso + macropore volume, in contrast to a typical BF coke.

Original languageEnglish
Pages (from-to)320-327
Number of pages8
JournalFuel
Volume186
DOIs
Publication statusPublished - 15 Dec 2016

Keywords

  • Alkali treatment
  • Blast furnace coke
  • Brown coal
  • Coke strength and reactivity
  • Surface area and pore volume and graphitic structure

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