Advances in the development of novel cobalt Fischer-Tropsch catalysts for synthesis of long-chain hydrocarbons and clean fuels.

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 (<6 nm) Co particles. A higher coverage of irreversibly bonded CO was found for small Co particles that was ascribed to a larger fraction of low-coordinated surface sites. The coverages and residence times obtained from SSITKA were used to describe the surface-specific activity (TOF) quantitatively and the CH4 selectivity qualitatively as a function of Co particl...

On the origin of the cobalt particle size effects in Fischer-Tropsch catalysis.

Pore Size Effects in Fischer Tropsch Synthesis over Cobalt-Supported Mesoporous Silicas

Fischer–Tropsch synthesis over γ-alumina-supported cobalt catalysts: Effect of support variables

Cobalt particle size effects in Fischer–Tropsch synthesis: structural and in situ spectroscopic characterisation on reverse micelle-synthesised Co/ITQ-2 model catalysts

A. Holmen

Papers

Study of Pt-promoted cobalt CO hydrogenation catalysts