The comparison of a lignite char, subbituminous coal char, and a bituminous coal char used in the reaction with steam to produce hydrogen

Conference · Wed Jun 01 04:00:00 EDT 1988 · Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States)

OSTI ID:6506714

Timpe, R C; Sears, R E ^[1]

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1. Univ. of North Dakota Energy and Minerals Research Center, Grand Forks, ND (US)

The use of coal as a carbon source in the char-steam reaction to produce hydrogen gas over the temperature range 700/sup 0/-800/sup 0/C (973-1073K) at atmospheric pressure has been studied in detail. Velva lignite has properties which give its char superior reactivity over those of the other coals tested. Catalysis with alkali carbonated enhanced the reactivity of Velva char substantially, whereas demineralization reduced the reactivity to a relatively constant value over the temperature range studied by removing inorganic material and altering the surface characteristics of the coal. Char produced from a Wyodak subbituminous coal and River King bituminous coal were much less reactive than Velva in the absence of catalyst but responded positively to the addition of alkali carbonates. Upon demineralization, these coals also showed reduced reactivity and altered surface features. This paper discusses the results of the experiments in terms of the reactivity data, SEM photos and elemental mapping, organic properties as determined from 13C NMR and ESCA spectroscopy, and inorganic content of the substrates.

• OSTI ID: 6506714
• Report Number(s): CONF-8806136-
• Conference Information: Journal Name: Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States) Journal Volume: 33:2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010409 -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ALKALI METAL COMPOUNDS
ATMOSPHERIC PRESSURE
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBON 13
CARBON COMPOUNDS
CARBON ISOTOPES
CARBONACEOUS MATERIALS
CARBONATES
CATALYSTS
CATALYTIC EFFECTS
CHARS
CHEMICAL PROPERTIES
CHEMICAL REACTION KINETICS
COAL
COAL GASIFICATION
DATA
ELECTRON MICROSCOPY
ENERGY SOURCES
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GASIFICATION
HIGH TEMPERATURE
HYDROGEN PRODUCTION
INFORMATION
ISOTOPES
KINETICS
LIGHT NUCLEI
LIGNITE
MATERIALS
MICROSCOPY
MINERALS
NMR SPECTRA
NUCLEI
NUMERICAL DATA
OXYGEN COMPOUNDS
PYROLYSIS PRODUCTS
REACTION KINETICS
SCANNING ELECTRON MICROSCOPY
SODIUM CARBONATES
SODIUM COMPOUNDS
SPECTRA
STABLE ISOTOPES
SUBBITUMINOUS COAL
THERMOCHEMICAL PROCESSES