Catalytic gasification: Isotopic labeling and transient reaction

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

OSTI ID:5936482

Saber, J M; Falconer, J L; Brown, L F

Temperature-programmed reaction was used with labeled isotopes (/sup 13/C and /sup 18/O) to study interactions between carbon black and potassium carbonate in pure He and 10% CO/sub 2//90% He atmospheres. Catalytic gasification precursor complexes were observed. Carbon and oxygen-bearing carbon surface groups interacted with the carbonate above 500 K to form surface complexes. Between 500 K and 950 K, and in the presence of gaseous carbon dioxide, the complexes promoted carbon and oxygen exchange between the gas-phase CO/sub 2/ and the surface. Oxygen exchanged between the surface complexes; but carbon did not exchange between the carbonate and the carbon black. As the temperature rose, the complexes decomposed to produce carbon dioxide, and catalytic gasification then began. Elemental potassium formed, and the active catalyst appears to alternate between potassium metal and a potassium-oxygen-carbon complex.

• DOE Contract Number: FG22-82PC50798
• OSTI ID: 5936482
• Report Number(s): CONF-841121-
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKALI METAL COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CARBON
CARBON 13
CARBON BLACK
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON ISOTOPES
CARBON OXIDES
CARBONATES
CATALYSIS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CONTROL
ELEMENTS
EVEN-ODD NUCLEI
FLUIDS
GASES
GASIFICATION
HELIUM
HIGH TEMPERATURE
ISOTOPES
ISOTOPIC EXCHANGE
KINETICS
LABELLING
LIGHT NUCLEI
MINUTES LIVING RADIOISOTOPES
NONMETALS
NUCLEI
OXIDES
OXYGEN
OXYGEN 15
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
RADIOISOTOPES
RARE GASES
REACTION KINETICS
STABLE ISOTOPES
TEMPERATURE CONTROL
THERMOCHEMICAL PROCESSES