Steam gasification of carbon: Catalyst properties
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. The authors 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. This report describes the objectives and scope of the research, the research plan, and discusses the status and accomplishments to date.
- Research Organization:
- Colorado Univ., Boulder, CO (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG22-88PC88915
- OSTI ID:
- 6132967
- Report Number(s):
- DOE/PC/88915-T10; ON: DE91011310
- Country of Publication:
- United States
- Language:
- English
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Steam gasification of carbon: Catalyst properties
Steam gasification of carbon: Catalyst properties
Related Subjects
COAL GASIFICATION
CATALYSIS
ALKALI METALS
ALKALINE EARTH METALS
CARBON 13
CARBON DIOXIDE
CATALYSTS
CHARS
CHEMICAL REACTION KINETICS
GASIFICATION
HELIUM
MASS SPECTROSCOPY
POTASSIUM CARBONATES
POTASSIUM OXIDES
STEAM
SURFACE AREA
SURFACE PROPERTIES
TRACER TECHNIQUES
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBON ISOTOPES
CARBON OXIDES
CARBONATES
CHALCOGENIDES
ELEMENTS
EVEN-ODD NUCLEI
FLUIDS
GASES
ISOTOPE APPLICATIONS
ISOTOPES
KINETICS
LIGHT NUCLEI
METALS
NONMETALS
NUCLEI
OXIDES
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
PYROLYSIS PRODUCTS
RARE GASES
REACTION KINETICS
SPECTROSCOPY
STABLE ISOTOPES
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification