A Multi‐Parametric Catalyst Screening for CO<sub>2</sub> Hydrogenation to Ethanol
Andrey Goryachev, Alexey Pustovarenko, Genrikh Shterk, Nawal S. Alhajri, Aqil Jamal, Mohammed Albuali, Luke van Koppen, Il Son Khan, Artem Russkikh, Adrián Ramírez, Tuiana Shoinkhorova, Emiel J. M. Hensen, Jorge Gascón
Abstract
Abstract The 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.