COb>2b> hydrogenation to hydrocarbons over Co and Fe-based Fischer-Tropsch catalysts
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On Co-catalysts, COb>2b> is hydrogenated faster than CO, but CHb>4b> dominates the products.

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On Fe-catalysts, COb>2b> is hydrogenated slower than CO, but middle distillates prevail.

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This is explained considering the different adsorption strengths of CO and COb>2b>.

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On Fe-catalysts, chain growth sites are transformed into hydrogenation sites at low Pb>COb>.

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On Fe-catalysts, K promotes COb>2b> adsorption and the stability of chain growth sites.

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