Rate and selectivity modification in Fischer-Tropsch synthesis over charcoal supported molybdenum by forced concentration cycling

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6239948

Dun, J W; Gulari, E

Forced concentration cycling of the feed between pure CO and pure H/sub 2/ was used to successfully change both the selectivities and reactivities of promoted and unpromoted charcoal supported molybdenum catalysts in Fischer-Tropsch synthesis. It was found that with the unpromoted catalyst the rate enhancement increases with temperature and selectivity shifts towards methane. At the lower temperatures concentration cycling increases selectivity to ethane and higher hydrocarbons to levels only achievable with promised catalysts. Periodic operation with the potassium promoted catalyst results in small rate enhancements but the olefin to paraffin ratio is dramatically changed without changing the carbon number distribution.

• Research Organization: Chemical Engineering Dept., Univ. of Michigan, Ann Arbor, MI 48109
• OSTI ID: 6239948
• Report Number(s): CONF-851123-
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADSORBENTS
ALKALI METALS
ALKANES
ALKENES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHARCOAL
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
ELEMENTS
ETHANE
FISCHER-TROPSCH SYNTHESIS
HYDROCARBONS
HYDROGEN
KINETICS
METALS
METHANE
MOLYBDENUM
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM
PRODUCTION
REACTION KINETICS
TRANSITION ELEMENTS