CO<sub>2</sub> Conversion by Fischer‐Tropsch Synthesis Using Na‐Modified Fe Catalysts
Christian W. Schmidt, Sven Kureti
Abstract
Abstract Three Fe catalysts with different Na contents were prepared, characterized, and investigated for the CO 2 ‐based Fischer‐Tropsch synthesis (FTS). The FTS results clearly indicated that the selectivity towards long‐chain hydrocarbons was driven by the surface Na content, which promotes the CO dissociation and chain propagation. Additionally, it was shown that Fe 3 O 4 , Fe 5 C 2 and Fe 7 C 3 coexist during FTS, revealing specific catalytic activity. As a result, a tandem mechanism was suggested for the CO 2 conversion, consisting in a reverse water‐gas shift on Fe 3 O 4 followed by CO hydrogenation on the Fe carbides.
Topics & Concepts
Fischer–Tropsch processCatalysisSelectivityDissociation (chemistry)Water-gas shift reactionCarbideChemistrySyngasChemical engineeringTandemInorganic chemistryMaterials sciencePhysical chemistryOrganic chemistryEngineeringComposite materialCatalysts for Methane ReformingCatalysis for Biomass ConversionCatalysis and Hydrodesulfurization Studies