Influence of CO<sub>2</sub>‐Rich Syngas on the Selectivity to C<sub>10</sub>–C<sub>14</sub> in a Coupled Fischer‐Tropsch/Hydrocracking Process
Tabea J. Stadler, Barbara Bertin‐Mente, Roland Dittmeyer, Lucas Brübach, Tim Böltken, Peter Pfeifer
Abstract
Abstract Synthesis gas (syngas) used for the production of synthetic fuels may contain significant amounts of CO 2 , depending on its source. For Fischer‐Tropsch synthesis on cobalt, CO 2 can be considered as inert diluent. However, in the specific case of a coupled Fischer‐Tropsch‐hydrocracking (FT‐HC) process, CO 2 could interact with the catalyst in the HC step. In this experimental study, HC product distributions obtained for FT‐syngas compositions with and without CO 2 and N 2 are presented. The selected feed gas compositions result from an advanced syngas production route via plasma splitting of CO 2 . Main target product was kerosene, here being defined as C 10 –C 14 . It was found that the CO 2 presence is negligible with regard to adsorption or reaction on the HC catalyst. Further insights into possible impacts of CO 2 could be obtained from the analysis of alcohols in the aqueous phase.