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Kinetics and mechanism of the reduction of molten nickel sulfide by hydrogen

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Abstract

The kinetics and mechanism of the reduction of M3S2 by hydrogen have been investigated between 1133° and 1300°C. When high flow rates of hydrogen and argon or helium bubbling through the melt are maintained the rate-determining step is a chemical process which can be expressed by a rate law of the form

$$\begin{gathered} r_{H_2 S} = k_{expt} (N_S - \alpha )^2 p_{H_2 }^{1/2} \hfill \\ p_{H_2 } \geqslant 0.88atm \hfill \\ \end{gathered} $$

where kexpt = 85.1 atm-1/2 min-1, α = 0.17 at 1250°C.

The experimental activation energy for this process is 20.1 ±3.0 kcal per mole. These results are discussed in terms of possible catalysis by nickel.

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Authors and Affiliations

  1. Metallurgical Chemistry Research Laboratory, Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario, Canada

    J. J. Byerley, G. L. Rempel & N. Takebe

Authors
  1. J. J. Byerley
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  2. G. L. Rempel
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  3. N. Takebe
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Byerley, J.J., Rempel, G.L. & Takebe, N. Kinetics and mechanism of the reduction of molten nickel sulfide by hydrogen. Metall Trans 3, 2133–2138 (1972). https://doi.org/10.1007/BF02643223

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