Kinetics of catalyst loss during potassium-catalysed CO2 gasification of carbon

David A. Sams, Tevan Talverdian, Farhang Shadman

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

A significant fraction of the potassium catalyst can be lost by vaporization during catalysed carbon gasification. The extent of this loss depends primarily on the reaction start-up procedure. Temperature programmed experiments show that, under inert atmospheres, both KOH and K2CO3 react with carbon to give a reduced form of potassium-carbon complex. The formation of this complex appears to be a prerequisite for the vaporization of potassium. The rate of vaporization at 800 °C follows a first-order expression. Under gasification conditions, only a fraction of the catalyst is in this reduced form; therefore, the rate of catalyst loss during gasification is lower than that under inert atmospheres. The effect of catalyst loss on both the initial gasification rate and the variation in rate with conversion has been determined.

Original languageEnglish (US)
Pages (from-to)1208-1214
Number of pages7
JournalFuel
Volume64
Issue number9
DOIs
StatePublished - Sep 1985

Keywords

  • carbon gasification
  • kinetics
  • potassium catalyst

ASJC Scopus subject areas

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

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