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The interfacial kinetics of the reaction of CO2 with liquid nickel

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Abstract

Measurements of the rate of dissociation of CO2 on liquid nickel have been made by the14CO2-CO isotope exchange technique between 1490 and 1670 °C at CO2/CO ratios between 0.01 and 7. Apparent first order rate constants are given by the expression:ka = (1 + 2pCO2/pCO)−1exp(−12700/T - 0.65) mol cm−2 s−1 atm−1. It is shown that the results are consistent with blockage of the surface by oxygen which exhibits ideal Langmuirian adsorption over the conditions of the experiments. The adsorption coefficient of oxygen with respect to the infinitely dilute solution with 1 wt pct as the standard state is deduced to be given by the equation: logK′o = 11880/T - 4.6. It is deduced that the interfacial rate of oxidation of nickel by CO2 is given by the rate of dissociative chemisorption of CO2. Measurements of the rate of decarburization of liquid nickel are reexamined in the light of the present results.

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Authors and Affiliations

  1. Homer Research Laboratories, Bethlehem Steel Corporation, Bethlehem, PA

    A. W. Cramb

  2. Central Research Laboratories, The Broken Hill Proprietary Company Ltd., Shortland, NSW, Australia

    G. R. Belton (Director, Adjunct Professor, Honorary Professor)

  3. Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA

    G. R. Belton (Director, Adjunct Professor, Honorary Professor)

  4. Department of Metallurgy, University of Newcastle, NSW, Australia

    G. R. Belton (Director, Adjunct Professor, Honorary Professor)

Authors
  1. A. W. Cramb
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  2. G. R. Belton
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Cramb, A.W., Belton, G.R. The interfacial kinetics of the reaction of CO2 with liquid nickel. Metall Trans B 15, 655–661 (1984). https://doi.org/10.1007/BF02657286

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