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Gasification of dilute phase hydrogasification char. Final report

Technical Report ·
OSTI ID:6726634
A modification of the Hydrane process concept involves the production of methane by direct hydrogasification of coal in a free fall, dilutphase reactor. The char produced in the first step is gasified with steam and oxygen in a separate reactor to produce hydrogen for the first stage. Hydrogen, carbon monoxide and carbon dioxide are produced in the steam gasification step and may interfere with the steam-char reaction. Lignite is also being used as a feedstock in the Hydrane Process and its behavior during steam gasification is of interest. A high-pressure, high-temperature thermobalance (TGA) was used to determine the rates of gasification in steam, steam-hydrogen, and Syngas mixtures of a lignite and an Illinois No. 6 char prepared in a single-stage, dilute phase hydrogasifier at the Pittsburgh Energy Research Center. Twenty experiments were completed. Comparison of the results using the single-stage hydrogasification char with earlier results, obtained under identical conditions using an Illinois No. 6 coal char prepared in the two-stage Hydrane process at PERC, shows that the single-stage char reacts slightly faster.
Research Organization:
Battelle Columbus Labs., OH (USA)
OSTI ID:
6726634
Report Number(s):
BMI-X-690
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010600 -- Coal
Lignite
& Peat-- Properties & Composition
BROWN COAL
CARBONACEOUS MATERIALS
CHARS
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
COAL
COAL GASIFICATION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
GRAVIMETRIC ANALYSIS
HYDRANE PROCESS
KINETICS
LIGNITE
MODIFICATIONS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SNG PROCESSES
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES