Iron-based Fischer-Tropsch catalysts and methods of making and using
AssigneeConocoPhillips Company
InventorsRafael L. Espinoza, Kandaswamy Jothimurugesan, Ajoy P. Raje
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Abstract
The present invention presents an iron-based Fischer-Tropsch catalyst having a low water-gas shift activity and high selectivity and productivity toward a hydrocarbon wax wherein said catalyst comprises iron; silver; sodium, lithium, potassium, rubidium and/or cesium; optionally, calcium, magnesium, boron, and/or aluminum; and a silica structural promoter. The present invention further presents a method of making a precipitated iron-based Fischer-Tropsch catalyst. The present invention still further presents a process for producing hydrocarbons using the iron-based, precipitated Fischer-Tropsch catalyst of the present invention.
Claims126
A process for producing hydrocarbons comprising
- contacting a reactant gas mixture comprising synthesis gas with a Fischer-Tropsch catalyst comprising
- iron;
- silver;
- optionally, at least one selected from the group consisting of manganese, zinc and the combination thereof;
- a first promoter comprising lithium, wherein lithium is present in an amount between about 0.05 wt % and about 5 wt % of metal to total weight of catalyst;
- optionally, at least one second promoter selected from the group consisting of calcium, magnesium, boron, aluminum and any combination thereof;
- and
- at least one structural promoter;
- under suitable conditions and in a suitable reactor so as to produce a product mixture.
A process for producing hydrocarbons comprising
- contacting a reactant gas mixture comprising synthesis gas with a Fischer-Tropsch catalyst under suitable conditions and in a suitable reactor so as to produce a product mixture, wherein the Fischer-Tropsch catalyst comprises
- iron;
- silver;
- a first promoter comprising lithium;
- optionally, at least one second promoter selected from the group consisting of calcium, magnesium, boron, aluminum and any combination thereof;
- and
- a structural stabilizer comprising silica, wherein silica comprises between about 5 and about 45 parts by weight (pbw) of silica per 100 parts iron.
A process for producing hydrocarbons comprising
- contacting a reactant gas mixture comprising synthesis gas with a Fischer-Tropsch catalyst under suitable conditions and in a suitable reactor so as to produce a product mixture,
- wherein the Fischer-Tropsch catalyst comprises iron;
- silver, a first promoter comprising lithium;
- a second promoter comprising calcium, magnesium, or any combination thereof;
- and at least one structural promoter.
Dependencies are inferred from the claim text.