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Tuning the catalytic CO hydrogenation to straight- and long-chain aldehydes/alcohols and olefins/paraffins.

ABSTRACT: The catalytic CO hydrogenation is one of the most versatile large-scale chemical syntheses leading to variable chemical feedstock. While traditionally mainly methanol and long-chain hydrocarbons are produced by CO hydrogenation, here we show that the same reaction can be tuned to produce long-chain n-aldehydes, 1-alcohols and olefins, as well as n-paraffins over potassium-promoted CoMn catalysts. The sum selectivity of aldehydes and alcohols is usually >50?wt% whereof up to ?97% can be n-aldehydes. While the product slate contains ?60% n-aldehydes at /p_CO=0.5, a 65/35% slate of paraffins/alcohols is obtained at a ratio of 9. A linear Anderson-Schulz-Flory behaviour, independent of the /p_CO ratio, is found for the sum of C₄₊ products. We advocate a synergistic interaction between a Mn₅O₈ oxide and a bulk Co₂C phase, promoted by the presence of potassium, to be responsible for the unique product spectra in our studies.

SUBMITTER: Xiang Y

PROVIDER: S-EPMC5059682 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature

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Tuning the catalytic CO hydrogenation to straight- and long-chain aldehydes/alcohols and olefins/paraffins.

Xiang Yizhi Y Kruse Norbert N

Nature communications 20161006

The catalytic CO hydrogenation is one of the most versatile large-scale chemical syntheses leading to variable chemical feedstock. While traditionally mainly methanol and long-chain hydrocarbons are produced by CO hydrogenation, here we show that the same reaction can be tuned to produce long-chain n-aldehydes, 1-alcohols and olefins, as well as n-paraffins over potassium-promoted CoMn catalysts. The sum selectivity of aldehydes and alcohols is usually >50 wt% whereof up to ∼97% can be n-aldehyd ...[more]

PMID: 27708269

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