Designing a multifunctional catalyst for the direct production of gasoline range isoparaffins from CO2
A. Dokania, S. Ould-Chikh, A. Ramirez, J.L. Cerrillo, A. Aguilar, A. Russkikh, A. Alkhalaf, I. Hita, A. Bavykina, G. Shterk, N. Wehbe, A. Prat, E. Lahera, P. Castaño, E. Fonda, J.L. Hazemann and J. Gascon. JACS Au 1 (2021) 1961–1974. Designing a multifunctional catalyst for the direct production of gasoline range isoparaffins from CO2
The production of carbon-neutral fuels from CO2 presents an avenue for causing an appreciable impact in terms of volume towards the mitigation of global carbon emissions. To that end, production of isoparaffin rich fuels is highly desired. Here, we demonstrate the potential of a multifunctional catalyst combination, consisting of a methanol producer (InCo) and a Zn modified zeolite beta, which produces a majorly isoparaffinic hydrocarbon mixture from CO2 (up to ~85% isoparaffin selectivity among hydrocarbons) at CO2 conversion >15%. The catalyst combination was thoroughly characterized via an extensive complement of techniques. Specifically, operando X-ray Absorption Spectroscopy (XAS) reveals that Zn (which plays a crucial role of providing a hydrogenating function improving the stability of the overall catalyst combination and isomerization performance) is likely present in the form of Zn6O6 clusters within the zeolite component contrary to previously reported estimations.