Variation of rate during potassium-catalysed CO2 gasification of coal char

Robert T. Hamilton, David A. Sams, Farhang Shadman

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Abstract

The instantaneous rate of catalysed CO2 gasification of char at 800 °C was measured at various levels of conversion. One important reason for the change in rate during the gasification is the change in the solid surface area, measured in the present study by CO2 adsorption at 25 °C. The models which have been successful in representing the char porous structure under noncatalytic conditions were found inadequate for catalytic gasification at low conversions. Other important factors contributing to the variation in rate during conversion are the catalyst loss and the change in the catalyst/carbon ratio. A model is presented which combines the effects of these contributing factors and gives a satisfactory representation of the experimental data.

Original languageEnglish (US)
Pages (from-to)1008-1012
Number of pages5
JournalFuel
Volume63
Issue number7
DOIs
StatePublished - Jul 1984

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Keywords

  • catalysis
  • coal
  • gasification

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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