Preparation and use of supported potassium (or rubidium)-Group VIII-metal cluster catalysts in CO/H/sub 2/ Fischer-Tropsch synthesis reactions
This invention relates to unique supported potassium (or rubidium)-Group VIII-metal cluster catalysts which are useful in CO/H/sub 2/ reactions (Fischer-Tropsch synthesis reactions). The novel catalysts of the instant invention are prepared by depositing well characterized potassium (or rubidium)-Group VIII-metal carbonyl cluster complexes onto high surface area supports. Following a subsequent reduction, the precursor bimetallic cluster complexes are decomposed on the support surface forming a potassium (or rubidium) promoted Group VIII-metal cluster catalyst in which the potassium (or rubidium) and Group VIII metals are intimately associated. These unique, highly promoted cluster catalysts have been found to demonstrate high Group VIII-metal dispersions and enhanced Fischer-Tropsch activities and selectivities for producing olefinic and paraffinic hydrocarbons. In addition methane formation is dramatically reduced over the supported bimetallic cluster catalysts of the instant invention when compared to conventionally prepared supported potassium (or rubidium) promoted Group VIII-metal catalysts. 3 tables.
- Assignee:
- Exxon Research and Engineering Co.
- Patent Number(s):
- US 4154751
- OSTI ID:
- 6081183
- Country of Publication:
- United States
- Language:
- English
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10 SYNTHETIC FUELS
ALKALI METALS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
FLUIDS
HYDROCARBONS
HYDROGEN
MECHANICAL STRUCTURES
METALS
METHANATION
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM
PRECURSOR
RUBIDIUM
SUPPORTS