A multi-parametric catalyst screening for CO2 hydrogenation to ethanol
Alhajri, Nawal S.
van Koppen, Luke
Khan, Il Son
Hensen, Emiel J. M.
KAUST DepartmentKAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
KAUST: King Abdullah University of Science and Technology KCC SAUDI ARABIA
Chemical Science Program
Chemical Engineering Program
Embargo End Date2022-04-21
Permanent link to this recordhttp://hdl.handle.net/10754/668929
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AbstractThe direct hydrogenation of CO 2 to higher alcohols has the potential to turn the main contributor of global warming into a valuable feedstock. However, for this technology to become attractive, more efficient and, especially, selective catalysts are required. Here we present a high throughput study on the influence of different promoters on the CO 2 hydrogenation performance of Rh-SiO 2 catalysts. Fe and K promoters were found to improve ethanol selectivity at the expense of undesired CH 4 . The best-performing catalyst, with a composition 2 wt.% K, 20 wt.% Fe, and 5 wt.% Rh, displays an EtOH selectivity of 16% at CO 2 conversion level of 18.4% and CH 4 selectivity of 46%. The combination of different characterization techniques and catalyst screening allowed us to unravel the role of each catalyst component in this complex reaction mechanism.
CitationGoryachev, A., Pustovarenko, A., Shterk, G., Alhajri, N. S., Jamal, A., Albuali, M., … Gascon, J. (2021). A multi-parametric catalyst screening for CO2 hydrogenation to ethanol. ChemCatChem. doi:10.1002/cctc.202100302
SponsorsSaudi Aramco is gratefully acknowledged for financial support. The authors acknowledge Jullian Vittenet (KAUST) for ICP-OES measurements, Anissa Bendjeriou Sedjerari (KAUST) and Tiny Verhoeven (TU/e) for their assistance.