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Title: Steam gasification of carbon: Catalyst properties, March 15, 1992--June 14, 1992

Abstract

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.

Authors:
Publication Date:
Research Org.:
Colorado Univ., Boulder, CO (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
7152429
Report Number(s):
DOE/PC/88915-T16
ON: DE92040534
DOE Contract Number:  
FG22-88PC88915
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 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

Citation Formats

Falconer, J L. Steam gasification of carbon: Catalyst properties, March 15, 1992--June 14, 1992. United States: N. p., 1992. Web. doi:10.2172/7152429.
Falconer, J L. Steam gasification of carbon: Catalyst properties, March 15, 1992--June 14, 1992. United States. doi:10.2172/7152429.
Falconer, J L. Mon . "Steam gasification of carbon: Catalyst properties, March 15, 1992--June 14, 1992". United States. doi:10.2172/7152429. https://www.osti.gov/servlets/purl/7152429.
@article{osti_7152429,
title = {Steam gasification of carbon: Catalyst properties, March 15, 1992--June 14, 1992},
author = {Falconer, J L},
abstractNote = {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.},
doi = {10.2172/7152429},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {7}
}