Steam gasification of carbon: Catalyst properties

Technical Report · Sat Jun 15 04:00:00 EDT 1991

OSTI ID:5658414

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 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 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 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: 5658414
• Report Number(s): DOE/PC/88915-T11; ON: DE91016575
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ALKALI METALS
ALKALINE EARTH METALS
CARBON
CARBON BLACK
CATALYSIS
CHARS
COAL GASIFICATION
DOCUMENT TYPES
ELEMENTAL MINERALS
ELEMENTS
GASIFICATION
GRAPHITE
ISOTOPE APPLICATIONS
MASS SPECTROSCOPY
METALS
MICROSCOPY
MINERALS
NONMETALS
PROGRESS REPORT
PYROLYSIS PRODUCTS
SPECTROSCOPY
STEAM
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TRACER TECHNIQUES