Mobility and versatility of the liquid bismuth promoter in the working iron catalysts for light olefin synthesis from syngas
Bang Gu, Deizi V. Peron, Alan J. Barrios, Mounib Bahri, Ovidiu Ersen, Michael Vorochta, Břetislav Šmíd, Dipanjan Banerjee, Mirella Virginie, Éric Marceau, Robert Wojcieszak, Vitaly V. Ordomsky, Andreï Y. Khodakov
Abstract
the particle migration and coalescence mechanism. Catalyst activation in carbon monoxide and in syngas leads to liquid bismuth metallic species, which readily migrate over the catalyst surface with the formation of larger spherical bismuth droplets and iron-bismuth core-shell structures. In the working catalysts, during Fischer-Tropsch synthesis, metallic bismuth located at the interface of iron species undergoes continuous oxidation and reduction cycles, which facilitate carbon monoxide dissociation and result in the substantial increase in the reaction rate.