Desulfurization of coal in a fluidized bed reactor

Conference · Thu Sep 01 04:00:00 EDT 1977

DOI:https://doi.org/10.1021/bk-1977-0064.ch023· OSTI ID:6747780

Haldipur, G B; Wheelock, T D

The results of this study confirmed that it is possible to remove substantial amounts of sulfur from pulverized bituminous coal in a fluidized bed reactor operated at elevated temperatures. However, the removal of sulfur is accompanied by a substantial loss of volatile matter. Both the degree of desulfurization and extent of devolatilization are strongly influenced by temperature. The composition of the fluidizing gas appears to have more effect on the removal of pyritic sulfur than on the removal of organic sulfur and volatile matter in the 240 to 400/sup 0/C range. Thus an oxygen-bearing gas appears more effective for removing pyritic sulfur than a hydrogen-bearing gas, and nitrogen is completely ineffective. On the other hand, the removal of organic sulfur appears due mainly to pyrolysis and devolatilization and is not a strong function of the treatment gas composition. Since a significant part of the coal is volatilized, the recovery and utilization of the volatile products is important. Two industrial process alternatives are considered in some detail. While the methods applied in this study did not reduce the sulfur content of the selected coal to the point where the product would meet present air pollution control standards, further improvement in methodology is possible.

• Research Organization: Iowa State Univ. of Science and Technology, Ames (USA). Energy and Mineral Resources Research Inst.
• OSTI ID: 6747780
• Report Number(s): IS-ICP-49; CONF-770814-15
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
DESULFURIZATION
DEVOLATILIZATION
ELEMENTS
ENERGY SOURCES
FLUIDIZED BED REACTORS
FOSSIL FUELS
FUEL DISPERSION REACTORS
FUELS
HOMOGENEOUS REACTORS
IRON COMPOUNDS
IRON SULFIDES
MINERALS
NONMETALS
ORES
OXIDATION
PYRITE
PYRITES
REACTORS
RECOVERY
REMOVAL
SULFIDES
SULFUR
SULFUR COMPOUNDS
SULFUR ORES
TRANSITION ELEMENT COMPOUNDS
VOLATILE MATTER