On the origin of the cobalt particle size effects in Fischer−Tropsch catalysis
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2009
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den Breejen, J.P.
Radstake, P.B.
Bezemer, G.L.
Bitter, J. H.
Froseth, V.
Holmen, A.
de Jong, K.P.
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Abstract
The effects of metal particle size in catalysis are of prime scientific and industrial importance and call for a better understanding. In this paper the origin of the cobalt particle size effects in Fischer−Tropsch (FT) catalysis was studied. Steady-State Isotopic Transient Kinetic Analysis (SSITKA) was applied to provide surface residence times and coverages of reaction intermediates as a function of Co particle size (2.6−16 nm). For carbon nanofiber supported cobalt catalysts at 210 °C and H2/CO = 10 v/v, it appeared that the surface residence times of reversibly bonded CHx and OHx intermediates increased, whereas that of CO decreased for small (
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den Breejen, J P, Radstake, P B, Bezemer, G L, Bitter, J H, Froseth, V, Holmen, A & de Jong, K P 2009, 'On the origin of the cobalt particle size effects in Fischer−Tropsch catalysis', Journal of the American Chemical Society, vol. 131, no. 20, pp. 7197-7203.