Interaction of NaCl with limestones during calcination
The interaction of small quantities of NaCl with limestone during calcination is shown to increase the average pore diameters of the lime particles. For twenty-eight limestones pore diameters increased from an overall average of 0.14 to 1.8 ..mu..m for 2.0 wt % NaCl addition. These structural changes are thought to result from the formation of trace amounts of liquid phase at high temperatures, which increases the ionic diffusion of the system. Controlled use of salt additives can result in a pore structure favorable to subsequent reactions involving gas or liquid phases. The effectiveness of the salt addition in promoting changes in pore distribution is dependent on the impurity content of the original limestone.
- Research Organization:
- Argonne National Lab., IL
- OSTI ID:
- 5242344
- Journal Information:
- Am. Ceram. Soc. Bull.; (United States), Vol. 59:5
- Country of Publication:
- United States
- Language:
- English
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01 COAL, LIGNITE, AND PEAT
LIMESTONE
CALCINATION
SULFUR DIOXIDE
REMOVAL
COAL
COMBUSTION
FLUE GAS
FLUIDIZED-BED COMBUSTION
INTERACTIONS
PHYSICAL PROPERTIES
SODIUM CHLORIDES
ALKALI METAL COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASEOUS WASTES
HALIDES
HALOGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
ROCKS
SEDIMENTARY ROCKS
SODIUM COMPOUNDS
SULFUR COMPOUNDS
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
WASTES
360603* - Materials- Properties
010800 - Coal
Lignite
& Peat- Waste Management