Abstract
Fisher-Tropsch Synthesis (FTS) is industrially used for converting a carbon-containing feedstock, such as coal, natural gas, biomass, and municipal waste, via the production of synthesis gas (a mixture of CO+H2) into hydrocarbons. This review article focuses on Fe-based FTS catalysis, thereby focusing on the process conditions available for steering the various carbon pathways from input CO and their associated reactions. We will also discuss the effects of alkali-sulphur chemical promotion and the identification of the FTS reaction active Fe carbides, which are assigned with precise crystal structures and nomenclature. Each observed Fe carbide crystal structure is further assigned with corresponding Mössbauer Absorption Spectroscopy (MAS) hyperfine fields. The expected formation temperatures and experimental conditions for the identified Fe carbides encountered in FTS research, namely ϵ-Fe3C, η-Fe2C, χ-Fe5C2, θ-Fe3C and θ-Fe7C3, are reviewed.
| Original language | English |
|---|---|
| Pages (from-to) | 4202-4223 |
| Number of pages | 22 |
| Journal | ChemCatChem |
| Volume | 12 |
| Issue number | 17 |
| DOIs | |
| Publication status | Published - 4 Sept 2020 |
Funding
This research received funding from the Dutch Research Council (NWO) in the framework of the TASC Technology Area “Syngas, a Switch to Flexible New feedstock for the Chemical Industry (TA‐Syngas)”. Dow Chemicals and Johnson‐Matthey are also acknowledged for their funding. Achim Iulian Dugulan (Delft University of Technology) is acknowledged for discussion on the MAS literature, while Pierre‐Francois M. Vittoz (Universiteit Utrecht) for translation and discussion of reference [133].
Keywords
- Fischer-Tropsch Synthesis
- Iron Carbides
- Mössbauer Absorption Spectroscopy
- Na−S Promotion
- Process Conditions
