The selective oxidation desulfurization process: bench-scale studies: Final report

Technical Report · Mon May 01 04:00:00 EDT 1989

OSTI ID:5976775

Tewksbury, T L; Carlton, H E; Cho Kim, B; Fan, L -S; Oxley, J H

Five high-sulfur caking coals were desulfurized, under bench-scale conditions, using a fluidized-bed selective oxidation process. Earlier work with this selective oxidation process (EPRI report AP-4873) had shown very promising sulfur removal results under batch operating conditions. For this current work, the bench-scale unit was modified is that it could simulate continuous operation under more realistic conditions: the collection and recycle of fines, addition of SO/sub 2/ to the fluidizing gas, and semi-continuous feed. Under batch conditions, the reductions in sulfur achieved were generally equivalent to at least the pyritic sulfur content of each coal. The simulated continuous-operation experiments indicated that continuous operation might give slightly reduced sulfur-removal efficiencies. Temperatures of 725-775/degree/F and residence times of 2-4 hours are required for near optimum sulfur removal. Gas compositions of 8-26% air (92 to 74% steam) were used. For Pittsburgh No. 8 seam coal, 70% reduction in total sulfur was achieved. Kentucky No. 9 seam coal had a sulfur reduction of over 60% and the two Illinois No. 6 coals were desulfurized by over 50%. Heating value losses from the coals during processing ranged from 5 to 40 percent. 11 figs., 7 tabs.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA); Battelle Columbus Div., OH (USA)
• OSTI ID: 5976775
• Report Number(s): EPRI-ER-6366
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
BENCH-SCALE EXPERIMENTS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COAL PREPARATION
DATA
DESULFURIZATION
DOCUMENT TYPES
ECONOMICS
ENERGY SOURCES
EXPERIMENTAL DATA
FEDERAL REGION IV
FEDERAL REGION V
FLUIDIZED BEDS
FOSSIL FUELS
FUELS
ILLINOIS
INFORMATION
IRON COMPOUNDS
IRON SULFIDES
KENTUCKY
MATERIALS
MINERALS
NORTH AMERICA
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PROGRESS REPORT
PYRITE
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TRANSITION ELEMENT COMPOUNDS
USA