title: 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 /pCO=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 /pCOratio, is found for the sum of C4+products. We advocate a synergistic interaction between a Mn5O8oxide and a bulk Co2C phase, promoted by the presence of potassium, to be responsible for the unique product spectra in our studies.
authors.affiliation: Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, USA.
authors.forename: Yizhi
authors.initials: Y
authors.lastname: Xiang
authors.affiliation: Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, USA.|Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99332, USA.
authors.forename: Norbert
authors.initials: N
authors.lastname: Kruse