Steam gasification of carbon: Catalyst properties

Technical Report · Fri Dec 13 04:00:00 EST 1991

DOI:https://doi.org/10.2172/5544428· OSTI ID:5544428

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. 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: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-88PC88915
• OSTI ID: 5544428
• Report Number(s): DOE/PC/88915-T13; ON: DE92011621
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CARBON
CARBON 13
CARBON ISOTOPES
CATALYSTS
CATALYTIC EFFECTS
CHARS
CHEMICAL REACTION KINETICS
DOCUMENT TYPES
ELEMENTS
EVEN-ODD NUCLEI
GASIFICATION
ISOTOPES
KINETICS
LIGHT NUCLEI
MASS SPECTROSCOPY
NONMETALS
NUCLEI
PROGRESS REPORT
PYROLYSIS PRODUCTS
REACTION KINETICS
SPECTROSCOPY
STABLE ISOTOPES
STEAM
STOICHIOMETRY
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES