Desulfurization of coal in a fluidized bed reactor at elevated temperatures. [MS thesis; 53 references]

Technical Report · Fri Oct 01 00:00:00 EDT 1976

DOI:https://doi.org/10.2172/7337623· OSTI ID:7337623

Haldipur, G B

In a batch, fluidized-bed reactor under essentially isothermal conditions the effectiveness of hydrogen and oxygen in the removal of sulfur from coal was evaluated at temperatures in the range of 220/sup 0/-410/sup 0/C, and compared with the desulfurization achieved due to thermal pyrolysis of coal. A statistical parametric study was done to determine the effects of temperature, type of treatment gas and the ash content on weight loss, volatile matter loss and sulfur removal from coal. The reactions of organic and pyritic sulfur were shown to be very temperature sensitive. The removal of organic sulfur is effected only by the thermal decomposition reactions during pyrolysis. Pyritic sulfur reacts appreciably with oxygen or hydrogen at 400/sup 0/C. After removal of the sulfurous gases and carbon dioxide, the heating value of the fuel gas evolved from coal was estimated to be 400 to 900 Btu/scf. The specific sulfur content (lb. S./MM Btu) of the char residue was not appreciably different from that of the feed coal. However, if the evolved gas is desulfurized and used with the char, the specific sulfur content of the overall product could be significantly reduced.

• Research Organization: Iowa State Univ. of Science and Technology, Ames (USA). Energy and Mineral Resources Research Inst.
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 7337623
• Report Number(s): IS-ICP-31
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CARBON OXYSULFIDE
REMOVAL
COAL
DESULFURIZATION
PYROLYSIS
FUEL GAS
CALORIFIC VALUE
HYDROGEN SULFIDES
SULFUR DIOXIDE
COMPARATIVE EVALUATIONS
EFFICIENCY
FLUIDIZED BED
HYDROGEN
ORGANIC SULFUR COMPOUNDS
OXYGEN
PYRITE
TEMPERATURE DEPENDENCE
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION PROPERTIES
CRYOGENIC FLUIDS
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GAS FUELS
GASES
HYDROGEN COMPOUNDS
IRON COMPOUNDS
IRON SULFIDES
MINERALS
NONMETALS
ORES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYRITES
SULFIDES
SULFUR COMPOUNDS
SULFUR ORES
SULFUR OXIDES
TRANSITION ELEMENT COMPOUNDS
010402* - Coal
Lignite
& Peat- Purification & Upgrading