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Physical Chemistry Chemical Physics, issue 27, 2007Ϊ¡°Bridging the pressure and material gap in heterogeneous catalysis¡±×¨¼­
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Phys. Chem. Chem. Phys., 2007, 9, 3570 - 3576, DOI: 10.1039/b703003g
Bridging the pressure and material gap in heterogeneous catalysis: cobalt Fischer¨CTropsch catalysts from surface science to industrial application

Heiko Oosterbeek
The Fischer¨CTropsch (FT) process is the heart of many natural gas conversion processes as it enables the conversion of a mixture of CO and H2 into valuable long-chain hydrocarbons. Here we report on the use of state-of-the-art surface science techniques to obtain information on the relationship between the surface atomic structure of model catalysts and their performance in the Fischer¨CTropsch reaction. Cobalt single crystals and polycrystals were modified with non-reducible oxides as to resemble industrial catalysts. Reflection absorption infrared spectroscopy was used for examining the CO adsorption behaviour at room temperature as well as at 493 K at CO pressures spanning 10¨C7 to 300 mbar on both (modified) Co single/polycrystals and an industrial catalyst. Polarization modulation was applied to cancel the CO gas phase absorption. Subsequently, they were subjected to reaction tests in the same apparatus at 1 bar and 493 K. This allowed us to close the material, pressure and instrument gap in the field of Fischer¨CTropsch synthesis on cobalt-based catalysts.

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