Design of supported cobalt catalysts with maximum activity for the Fischer-Tropsch synthesis

Johan P. den Breejen; Jelle R.A. Sietsma; Heiner Friedrich; Johannes H. Bitter; Krijn P. de Jong

doi:10.1016/j.jcat.2009.12.015

Design of supported cobalt catalysts with maximum activity for the Fischer-Tropsch synthesis

Johan P. den Breejen
, Jelle R.A. Sietsma
, Heiner Friedrich
, Johannes H. Bitter
, Krijn P. de Jong

Research output: Contribution to journal › Article › Academic › peer-review

177 Citations (Scopus)

Abstract

The role of the cobalt particle size distribution in the Fischer-Tropsch (FT) reaction for supported Co catalysts was investigated. Using TEM histogram analyses and activity measurements of carbon nanofiber-supported catalysts, the TOF of discrete Co particle sizes was calculated. It was found that cobalt particles of 4.7 ± 0.2 nm are the most active in the FT reaction (1 bar, 220 °C), and a narrow Co particle size distribution is clearly essential to arrive at the maximum activity. We have approached this requirement for maximum FT activity with an 18 wt.% Co/SiO₂ catalyst prepared via impregnation, drying and calcination in NO/He. The more narrow Co particle size distribution (4.6 ± 0.8 nm) in Co/SiO₂ led to an activity enhancement of ∼40% compared to Co/CNF (5.7 ± 1.4 nm), although some promoting effect of silica could not be excluded.

Original language	English
Pages (from-to)	146-152
Number of pages	7
Journal	Journal of Catalysis
Volume	270
Issue number	1
DOIs	https://doi.org/10.1016/j.jcat.2009.12.015
Publication status	Published - 22 Mar 2010

Funding

The authors acknowledge beamline scientists from beamline C, DESY synchrotron with their help on conducting the XAS experiments. S. Menda Ginteng is thanked for her help with preparation of some Co/CNF catalysts. Dr. G.L. Bezemer is acknowledged for TEM and FT data. Shell Global Solutions is thanked for funding of this research.

Keywords

Cobalt catalysts
Cobalt on silica
Fischer-Tropsch synthesis
NO calcination
Particle size distribution

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10.1016/j.jcat.2009.12.015

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title = "Design of supported cobalt catalysts with maximum activity for the Fischer-Tropsch synthesis",

abstract = "The role of the cobalt particle size distribution in the Fischer-Tropsch (FT) reaction for supported Co catalysts was investigated. Using TEM histogram analyses and activity measurements of carbon nanofiber-supported catalysts, the TOF of discrete Co particle sizes was calculated. It was found that cobalt particles of 4.7 ± 0.2 nm are the most active in the FT reaction (1 bar, 220 °C), and a narrow Co particle size distribution is clearly essential to arrive at the maximum activity. We have approached this requirement for maximum FT activity with an 18 wt.\% Co/SiO2 catalyst prepared via impregnation, drying and calcination in NO/He. The more narrow Co particle size distribution (4.6 ± 0.8 nm) in Co/SiO2 led to an activity enhancement of ∼40\% compared to Co/CNF (5.7 ± 1.4 nm), although some promoting effect of silica could not be excluded.",

keywords = "Cobalt catalysts, Cobalt on silica, Fischer-Tropsch synthesis, NO calcination, Particle size distribution",

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year = "2010",

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AU - den Breejen, Johan P.

AU - Sietsma, Jelle R.A.

AU - Friedrich, Heiner

AU - Bitter, Johannes H.

AU - de Jong, Krijn P.

PY - 2010/3/22

Y1 - 2010/3/22

N2 - The role of the cobalt particle size distribution in the Fischer-Tropsch (FT) reaction for supported Co catalysts was investigated. Using TEM histogram analyses and activity measurements of carbon nanofiber-supported catalysts, the TOF of discrete Co particle sizes was calculated. It was found that cobalt particles of 4.7 ± 0.2 nm are the most active in the FT reaction (1 bar, 220 °C), and a narrow Co particle size distribution is clearly essential to arrive at the maximum activity. We have approached this requirement for maximum FT activity with an 18 wt.% Co/SiO2 catalyst prepared via impregnation, drying and calcination in NO/He. The more narrow Co particle size distribution (4.6 ± 0.8 nm) in Co/SiO2 led to an activity enhancement of ∼40% compared to Co/CNF (5.7 ± 1.4 nm), although some promoting effect of silica could not be excluded.

AB - The role of the cobalt particle size distribution in the Fischer-Tropsch (FT) reaction for supported Co catalysts was investigated. Using TEM histogram analyses and activity measurements of carbon nanofiber-supported catalysts, the TOF of discrete Co particle sizes was calculated. It was found that cobalt particles of 4.7 ± 0.2 nm are the most active in the FT reaction (1 bar, 220 °C), and a narrow Co particle size distribution is clearly essential to arrive at the maximum activity. We have approached this requirement for maximum FT activity with an 18 wt.% Co/SiO2 catalyst prepared via impregnation, drying and calcination in NO/He. The more narrow Co particle size distribution (4.6 ± 0.8 nm) in Co/SiO2 led to an activity enhancement of ∼40% compared to Co/CNF (5.7 ± 1.4 nm), although some promoting effect of silica could not be excluded.

KW - Cobalt catalysts

KW - Cobalt on silica

KW - Fischer-Tropsch synthesis

KW - NO calcination

KW - Particle size distribution

UR - https://www.scopus.com/pages/publications/76749121872

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DO - 10.1016/j.jcat.2009.12.015

M3 - Article

AN - SCOPUS:76749121872

SN - 0021-9517

VL - 270

SP - 146

EP - 152

JO - Journal of Catalysis

JF - Journal of Catalysis

IS - 1

ER -

Design of supported cobalt catalysts with maximum activity for the Fischer-Tropsch synthesis

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Keywords

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