Mechanism of promotion of iron Fischer-Tropsch catalysts: Quarterly report for period ending June 30, 1986

Technical Report · Wed Jan 01 04:00:00 EST 1986

DOI:https://doi.org/10.2172/6130641· OSTI ID:6130641

The Fischer-Tropsch reaction is a complex combination of many reactions. Among those that have been demonstrated to occur on the catalyst surface are CO dissociation, build-up of carbon chains by a polymerization process, desorption of products such as olefins and oxygen-containing compounds, water formation and its subsequent shift reaction to form CO/sub 2/, olefin hydrogenation, isomerization and reincorporation in the synthesis and, probably, other reactions yet to be identified and studied. The tracer technique, involving the feeding of /sup 14/C-labeled compounds to the synthesis, is being used here in an effort to learn how catalyst additives and supports influence these reactions and determine the final product distribution. Difficulties were encountered in our efforts to measure the amount of /sup 14/C in the higher carbon liquid products (C/sub 6/ and higher) but they have now been overcome. Only 15%, or less, of the /sup 14/C added to the reactor during a 24 hour period was incorporated into the non-oxygenated components. Liquid chromatographic separation, following separation into alkene and alkane fractions by dry column silica gel chromatography, permitted collection of samples corresponding to each of the normal alkanes between C/sub 9/ and C/sub 15/. The refractive index detector permitted quantitative determination of the amount of each n-alkane collected. The /sup 14/C content of each n-alkane fraction was determined by liquid scintillation counting. 4 figs.

• Research Organization: Louisville Univ. Research Foundation, Inc., KY (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC22-84PC70029
• OSTI ID: 6130641
• Report Number(s): DOE/PC/70029-T3; ON: DE89010736
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ADDITIVES
ALCOHOLS
ALKANES
ALKENES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON 14
CARBON ISOTOPES
CATALYTIC EFFECTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMICAL REACTORS
DOCUMENT TYPES
ELEMENTS
ETHANOL
EVEN-EVEN NUCLEI
FISCHER-TROPSCH SYNTHESIS
HYDROCARBONS
HYDROXY COMPOUNDS
IRON
ISOTOPES
LABELLED COMPOUNDS
LIGHT NUCLEI
METALS
NUCLEI
ORGANIC COMPOUNDS
PENTANOLS
PROGRESS REPORT
PROMOTERS
RADIOISOTOPES
SEPARATION PROCESSES
TRANSITION ELEMENTS
YEARS LIVING RADIOISOTOPES
YIELDS