Evolution of hydrogen sulfide in a fluidized bed coal gasification reactor

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Ind. Eng. Chem. Res.; (United States)

DOI:https://doi.org/10.1021/ie00085a006· OSTI ID:6274107

Ma, R P; Felder, R M; Ferrell, J K

The rates of evolution of hydrogen sulfide have been measured for the steam/oxygen gasification of a devolatilized Western Kentucky bituminous coal, a New Mexico subbituminous coal, and a Texas lignite in a pilot-scale fluidized bed reactor, and a phenomenological model has been formulated to correlate the results. The model assumes instantaneous devolatilization and partial combustion of the coal followed by rate-limited gasification of the char in a single well-mixed stage and includes kinetic correlations for the water gas shift reaction and char hydrodesulfurization. Estimated char reactivities agree well with results obtained in other studies, and the model predictions are generally satisfactory, especially considering the relative simplicity of the model. The results indicate that sulfur present in the coal as pyrite, mercaptans, aliphatic sulfides, and disulfides is converted completely, while sulfur in aryl sulfides and thiophenes is only partially converted. A substantial fraction of the sulfur converted during gasification is released in pyrolysis - 50-70% for the subbituminous coal and 35-45% for the lignite.

• Research Organization: Dept. of Chemical Engineering, North Carolina State Univ., Raleigh, NC (US)
• OSTI ID: 6274107
• Journal Information: Ind. Eng. Chem. Res.; (United States), Journal Name: Ind. Eng. Chem. Res.; (United States) Vol. 28:1; ISSN IECRE
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010409 -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
010900 -- Coal
Lignite
& Peat-- Environmental Aspects
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL REACTIONS
CHEMICAL SHIFT
COAL
COAL GASIFICATION
COMBUSTION CONTROL
CONTROL
DECOMPOSITION
DEVOLATILIZATION
ELEMENTS
EMISSION
ENERGY SOURCES
FEDERAL REGION IV
FEDERAL REGION VI
FLUIDIZED BEDS
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GASIFICATION
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
IRON COMPOUNDS
IRON SULFIDES
KENTUCKY
LIGNITE
MATERIALS
MINERALS
NEW MEXICO
NONMETALS
NORTH AMERICA
PILOT PLANTS
PYRITE
PYROLYSIS
PYROLYSIS PRODUCTS
SUBBITUMINOUS COAL
SULFIDE MINERALS
SULFIDES
SULFUR
SULFUR COMPOUNDS
TEXAS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
USA