The least number of chemical reactions to describe the oxidation and the carburization of liquid iron in irreversible processes

Tao Xiaojie, Hiroyuki Fukuyama, M. Susa, K. Nagata

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Kinetics of reactions betwwen CO-CO2 mixtures and liquid iron were investigated at 1 843 K using the cold crucible technique and the concentration changes of C and O were analyzed using non-linear kinetic equations based upon independent reactions in the systems. The carbon or oxygen concentration changed against the chemical potential gradient in the initial stage of the reactions. It was proved that such concentrations changes were contolled only by interfacial reactions. The concentration changes in the whole process were succesfully reproduced by nonlinear equations based upon the two independent reactions in which the nonlinear reaction CO(g) = C+O was included. It has been shown that there are always some combinations of independent reactions which can describe the chemical changes in irreversible processes from the macroscopic point of view.

Original languageEnglish
Pages (from-to)1185-1193
Number of pages9
JournalIsij International
Volume38
Issue number11
Publication statusPublished - 1998 Dec 1
Externally publishedYes

Keywords

  • Carburization
  • Independent reaction
  • Kinetics
  • Liquid iron
  • Non-linear kinetic equation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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