Method for preparing a promoted iron catalyst and catalyst prepared by the method for conversion of synthesis gas to liquid hydrocarbons
This patent describes improvement in a method for preparing a catalytically active Fischer Tropach promoted iron catalyst. It comprises: activating an inactive catalyst precursor comprising an iron oxide and a promoting amount of potassium. The iron oxide is selected from the group consisting of precipitated iron oxide, fused magnetite, and iron oxide impregnated on a carrier. The activation being effected by contact of the inactive catalyst precursor with gaseous hydrogen, carbon monoxide, or a mixture thereof at elevated temperature. The improvement comprises contacting the catalyst precursor with water vapor during or after the activation step. The contacting with water vapor is conducted under a combination of conditions including a temperature of about 160{degrees} C. to about 350{degrees} C., a water vapor partial pressure of about 1 (one) to 500 psig, and for about 0.5 to 100 hours. The combination is effective to increase the selectivity of the activated catalyst for forming liquid hydrocarbons whereby forming selectivated activated catalyst.
- Assignee:
- Mobil Oil Corp., New York, NY (USA)
- Patent Number(s):
- US 4994428; A
- Application Number:
- PPN: US 7-324796
- OSTI ID:
- 5789414
- Resource Relation:
- Patent File Date: 17 Mar 1989
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CATALYSTS
SYNTHESIS
SYNTHESIS GAS
CATALYSIS
ACTIVATION ENERGY
FISCHER-TROPSCH SYNTHESIS
HYDROCARBONS
IRON OXIDES
PRODUCTION
CHALCOGENIDES
CHEMICAL REACTIONS
ENERGY
FLUIDS
GASES
IRON COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
020400* - Petroleum- Processing