Influence of salts on the sulfur retention of limestone in atmospheric fluidized-bed combustors
Increased utilization of the available CaO can reduce the amount of limestone required for SO/sub 2/ retention in atmospheric fluidized-bed combustion systems. In laboratory experiments, a pretreatment with inorganic salts, such as NaCl, CaCl/sub 2/, or Na/sub 2/CO/sub 3/, has been found to be an effective method of improving the CaO utilization. This report provides quantitative information on the effectiveness of the same sulfation-enhancement salts in reducing the limestone requirements in an atmospheric fluidized-bed combustor (AFBC). Some laboratory experiments indicated that only 0.1 mol % of salt was required to produce the structural changes in the limestone necessary to increase the CaO utilization. In contrast, the AFBC runs indicated that as much as 2.0 mol % salt was required to obtain a significant increase in the CaO utilization. The increased utilization of the salt-treated limestone in the AFBC reduced the total amount of limestone needed to meet the EPA emission standard for sulfur dioxide to one-half of that required when no treatment is used.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6426174
- Report Number(s):
- ANL/CEN/FE-80-19; ON: DE81028473
- Country of Publication:
- United States
- Language:
- English
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ADDITIVES
AIR POLLUTION CONTROL
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COAL
COMBUSTION
COMBUSTORS
CONTROL
DATA
ENERGY SOURCES
EXPERIMENTAL DATA
FLUE GAS
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
GASEOUS WASTES
HALIDES
HALOGEN COMPOUNDS
INFORMATION
LIMESTONE
MATERIALS
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
POWER PLANTS
REMOVAL
ROCKS
SEDIMENTARY ROCKS
SODIUM CARBONATES
SODIUM CHLORIDES
SODIUM COMPOUNDS
SULFIDATION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
WASTES