Regeneration of sulfated limestone from FBCs. Annual report, October 1978-September 1979

Technical Report · Mon Jan 01 04:00:00 EST 1979

DOI:https://doi.org/10.2172/5253234· OSTI ID:5253234

Johnson, I.; Moulton, D. S.; Nunes, F. F.; Swift, W. M.; Teats, F. G.; Jonke, A. A.

These studies are concerned with the development of processes for the regeneration of sulfated limestone from fluidized-bed combustors. The results of cyclic combustion/regeneration experiments on three limestones are reported. The reactivity of a low-reactivity limestone, Germany Valley, did not change significantly during cyclic combustion/regeneration. Studies of a high-reactivity limestone, Greer, at lower regeneration temperatures (1050/sup 0/C) indicated an apparently better performance than at 1100/sup 0/C. The sorbent utilization of type 2203 limestone in a three-cycle experiment was similar to that of Greer. The results of studies of a process for the recovery of elemental sulfur from SO/sub 2/ involving reaction with fly ash or coal ash-coal combinations are reported. The residual carbon in the fly ash was found to be an effective reductant for the SO/sub 2/ and high-purity sulfur was obtained. Regeneration of spent limestone sorbent in externally fired rotary kilns was accomplished, but only under conditions that resulted in rapid attack of the kiln materials by SO/sub 2/.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5253234
• Report Number(s): ANL/CEN/FE-79-13
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COMBUSTION
DATA
DATA FORMS
ENERGY SOURCES
EXPERIMENTAL DATA
FLUIDIZED-BED COMBUSTION
FOSSIL FUELS
FUELS
GRAPHS
INFORMATION
KINETICS
LIMESTONE
NUMERICAL DATA
OXIDATION
REACTION KINETICS
REGENERATION
ROCKS
SEDIMENTARY ROCKS
TABLES
THERMAL CYCLING
THERMOCHEMICAL PROCESSES