Steam gasification of carbon: Catalyst properties, March 15, 1992--June 14, 1992
This research uses several techniques to measure the concentration of catalyst sites and determine their stoichiometry for the catalyzed gasification of carbon. Both alkali and alkaline earth oxides are effective catalysts for accelerating the gasification rate of coal chars, but only a fraction of the catalyst appears to be in a form that is effective for gasification, and the composition of that catalyst is not established. Transient techniques, with {sup 13}C labeling, are being used to study the surface processes, to measure the concentration of active sites, and to determine the specific reaction rates. We have used secondary ion mass spectrometry (SIMS) for both high surface area samples of carbon/alkali carbonate mixtures and for model carbon surfaces with deposited alkali atoms. SIMS provides a direct measure of surface composition. The combination of these results can provide knowledge of catalyst dispersion and composition, and thus indicate the way to optimally utilize carbon gasification catalysts.
- Research Organization:
- Colorado Univ., Boulder, CO (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-88PC88915
- OSTI ID:
- 7152429
- Report Number(s):
- DOE/PC/88915-T16; ON: DE92040534
- Country of Publication:
- United States
- Language:
- English
Similar Records
Steam gasification of carbon: Catalyst properties. [Quarterly] report, December 14, 1991--March 14, 1992
Steam gasification of carbon: Catalyst properties. Reporting period, September 15, 1991--December 14, 1991
Related Subjects
ALKALI METAL COMPOUNDS
CATALYTIC EFFECTS
ALKALINE EARTH METAL COMPOUNDS
COAL GASIFICATION
CATALYSTS
CARBON
CARBON 13
CHARS
CHEMICAL REACTION KINETICS
MASS SPECTROSCOPY
OXIDES
PROGRESS REPORT
CARBON ISOTOPES
CHALCOGENIDES
DOCUMENT TYPES
ELEMENTS
EVEN-ODD NUCLEI
GASIFICATION
ISOTOPES
KINETICS
LIGHT NUCLEI
NONMETALS
NUCLEI
OXYGEN COMPOUNDS
PYROLYSIS PRODUCTS
REACTION KINETICS
SPECTROSCOPY
STABLE ISOTOPES
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification