Carbon-supported Fe-Mn and K-Fe-Mn clusters for the synthesis of C/sub 2/-C/sub 4/ olefins from CO and H/sub 2/. II. Activity and selectivity maintenance and regenerability

Journal Article · Fri May 01 04:00:00 EDT 1987 · J. Catal.; (United States)

OSTI ID:5456721

Venter, J; Kaminsky, M; Geoffroy, G L; Vannice, M A

Highly dispersed carbon-supported Mn-Fe and K-Mn-Fe catalysts were prepared which showed activity stabilization after a loss of approximately 50% of the initial activity during 24-110 h on-stream. The deactivation was attributed to carbon deposition, rather than sintering, and could be reversed by a treatment in hydrogen at reaction temperatures. Precursors with Fe/Mn = 2 optimized the olefin selectivity, and mixed-metal clusters of this type gave higher selectivities than their coimpregnated counterparts. A low reduction temperature (473 K) for the unpromoted NEt/sub 4/ (Fe/sub 2/Mn(CO)/sub 13/) catalyst gave a high selectivity to olefins which remained stable during the 24-h period the catalyst was maintained under reaction conditions. The particularly high C/sub 2/-C/sub 4/ olefin yields obtained with the K(Fe/sub 2/Mn(CO)/sub 13/) catalyst were sustained throughout the 26-h activity maintenance run.

• Research Organization: Pennsylvania State Univ., University Park
• OSTI ID: 5456721
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 105:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
ALKALI METALS
ALKENES
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
DEACTIVATION
DEPOSITION
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
HYDROCARBONS
HYDROGEN
HYDROGENATION
IRON
MANGANESE
METALS
MOLECULAR WEIGHT
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM
REGENERATION
STABILITY
SYNTHESIS
TRANSITION ELEMENTS