Zr-fe catalysts for fischer-tropsch synthesis
OwnerJames G. Goodwin, JR., Edgar Lotero +1inventors
InventorsJames G. Goodwin, JR., Edgar Lotero, Nattaporn Lohitharn
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Abstract
Disclosed are solid titanium-free Fischer-Tropsch catalysts including iron homogeneously modified with a zirconium promoter/stabilizer. The homogeneously mixed solid catalysts can be formed through co-precipitation of iron and zirconium precursors followed by calcination and reduction to form the active catalyst materials. The catalysts can optionally include additional materials such as copper, potassium, and silicon promoters.
Claims25
A Fischer-Tropsch synthesis catalyst comprising zirconium inserted throughout an iron oxide bulk catalyst, the catalyst including zirconium in an amount between about 3 mol % and about 20 mol % of the total amount of iron and zirconium in the catalyst, wherein the catalyst is a titanium-free catalyst.
A method for forming a Fischer-Tropsch synthesis catalyst comprising
- forming a titanium-free mixture including a zirconium containing precursor and an iron containing precursor in solution, the mixture including between about 3 mol % and about 20 mol % zirconium as compared to the total amount of iron and zirconium in the mixture;
- adding a precipitation initiator to the mixture;
- and
- co-precipitating the iron and the zirconium to form a particulate material including zirconium inserted throughout the bulk iron precipitate.
A method for converting reactants comprising
- contacting a gas stream comprising carbon monoxide and hydrogen gas with a titanium-free catalyst, the titanium-free catalyst including zirconium inserted throughout an iron oxide bulk catalyst, the titanium-free catalyst including the zirconium in an amount of between about 3 mol % and about 20 mol % of the total amount of iron and zirconium in the catalyst;
- and
- converting the carbon monoxide and the hydrogen gas into hydrocarbons according to a Fischer-Tropsch synthesis process.
Dependencies are inferred from the claim text.