Non-Anderson-Schulz-Flory product distribution of Fischer-Tropsch synthesis over iron/activated charcoal catalyst

The Fischer-Tropsch synthesis (FTS) product distribution and chain growth p robability (Anderson-Schulz-Flory (ASF) chain growth probability and intrin sic chain growth probability) were studied on activated charcoal-supported iron (Fe/AC) catalyst in an autoclave slurry reactor. It was demonstrated t hat the product distribution on Fe/AC catalyst deviates from ASF product di stribution. The experimental value at C-1 is larger than that in ASF produc t distribution, but the value at C-2 is lower than that in ASF plot. The ch ain growth investigation showed that the secondary reaction caused by olefi ns exists on Fe/AC catalyst under F-T condition, leading to that the produc t distribution deviates from ASF. It was showed that the water gas shift (W GS) reaction takes place simultaneously with FTS reaction. The XRD test fou nd that there exist two kinds of active phases, FexC and Fe3O4, on the used Fe/AC catalyst.