Role of the C--CO/sub 2/ reaction in gasification of coal and char

Technical Report · Thu Dec 01 04:00:00 EST 1977

DOI:https://doi.org/10.2172/7050518· OSTI ID:7050518

Wen, C. Y.; Sears, J. T.; Galli, A. F.

The initial reactivity of char with CO/sub 2/ was correlated with char composition by an equation involving the CaO and O/sub 2/ content of the chars. The pyrolysis technique employed to obtain the char can change the oxygen content by a factor of 2, in going from pyrolysis at 900/sup 0/C (2 min.) to pyrolysis at 1000/sup 0/C (30 min.). The surface area also changes. It appears that the ''available'' surface area does affect the rate; reactivity changes with char conversion were roughly proportional to changes in surface area (by CO/sub 2/ adsorption technique). Iron and magnesium are not important as catalysts; sodium and potassium were effective but were present only in low concentrations; therefore CaO was the only effective catalyst.

• Research Organization: West Virginia Univ., Morgantown (USA). Dept. of Chemical Engineering
• DOE Contract Number: EX-76-C-01-0497
• OSTI ID: 7050518
• Report Number(s): FE-0497-T-8
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHARS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL GASIFICATION
CRYOGENIC FLUIDS
DECOMPOSITION
ELEMENTS
FLUIDS
GASIFICATION
KINETICS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PYROLYSIS
REACTION KINETICS