Steam gasification of carbon: Catalyst properties

Technical Report · Wed Mar 20 04:00:00 EST 1991

OSTI ID:6132967

Falconer, J L

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: DOE; 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

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKALINE EARTH METALS
CARBON 13
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON ISOTOPES
CARBON OXIDES
CARBONATES
CATALYSIS
CATALYSTS
CHALCOGENIDES
CHARS
CHEMICAL REACTION KINETICS
COAL GASIFICATION
ELEMENTS
EVEN-ODD NUCLEI
FLUIDS
GASES
GASIFICATION
HELIUM
ISOTOPE APPLICATIONS
ISOTOPES
KINETICS
LIGHT NUCLEI
MASS SPECTROSCOPY
METALS
NONMETALS
NUCLEI
OXIDES
OXYGEN COMPOUNDS
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
POTASSIUM OXIDES
PYROLYSIS PRODUCTS
RARE GASES
REACTION KINETICS
SPECTROSCOPY
STABLE ISOTOPES
STEAM
SURFACE AREA
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TRACER TECHNIQUES