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Effect of Crystallite Size Distribution on the Oxidation and Re-reduction of Cobalt in the Fischer–Tropsch Synthesis: A Thermodynamic Analysis

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Abstract

Nano-sized cobalt crystallites may oxidize under realistic Fischer–Tropsch conditions, especially when operating at high conversion where oxygen availability on the surface is large. The extent of deactivation due to oxidation differs for monodispersed catalysts as opposed to a log-normal distribution of cobalt crystallites. The optimum cobalt crystallite size for a Fischer–Tropsch catalyst is dependent on not only the mean particle size, but also the log-normal variance and conversion level.

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Funding

This work is based on the research supported in part by the National Research Foundation of South Africa (Grant Number: 114606). Funding by Sasol and L’Oreal-UNESCO for Women in Science Fellowship is gratefully acknowledged.

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  1. Department of Chemical Engineering, Catalysis Institute, University of Cape Town, Rondebosch, Cape Town, South Africa

    Chelsea Tucker & Eric van Steen

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  1. Chelsea Tucker
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  2. Eric van Steen
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Correspondence to Eric van Steen.

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Tucker, C., van Steen, E. Effect of Crystallite Size Distribution on the Oxidation and Re-reduction of Cobalt in the Fischer–Tropsch Synthesis: A Thermodynamic Analysis. Catal Lett 151, 2631–2637 (2021). https://doi.org/10.1007/s10562-020-03475-7

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  • DOI: https://doi.org/10.1007/s10562-020-03475-7

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