Effects of salts on limestone dissolution rate in wet limestone flue gas desulfurization
- Mitsubishi Heavy Industries, Ltd., Hiroshima (Japan)
To understand how the dissolution rate of limestone used for absorbent in a wet flue gas desulfurization plant is affected by the soluble salts formed from hydrogen chloride gas in flue gas as well as from the impurities contained in the used raw material limestone itself, various limestone slurries each supplemented with a single salt of CaCl[sub 2], MgCl[sub 2], NaCl, Na[sub 2]SO[sub 4] and MgSO[sub 4] were titrated with sulfuric acid. From the titration results the dissolution rate was found to vary greatly with the kind and the concentration of the salts with a general tendency to decrease in chloride solution but to increase in sulfate solutions. Based on this finding, the authors proposed a semi-empirical simplified model. The evaluated results using this model closely agreed with the measured values of the limestone dissolution rate both in single-salt solutions and mixed salt solutions. 9 refs., 8 figs., 1 tab.
- OSTI ID:
- 6768227
- Journal Information:
- Environmental Progress; (United States), Vol. 12:4; ISSN 0278-4491
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
CHLORIDES
CHEMICAL REACTIONS
FLUE GAS
DESULFURIZATION
LIMESTONE
DISSOLUTION
SULFATES
CALCIUM CHLORIDES
LIME-LIMESTONE WET SCRUBBING PROCESSES
MAGNESIUM CHLORIDES
MAGNESIUM SULFATES
SODIUM CHLORIDES
SODIUM SULFATES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBONATE ROCKS
CHLORINE COMPOUNDS
GASEOUS WASTES
HALIDES
HALOGEN COMPOUNDS
MAGNESIUM COMPOUNDS
OXYGEN COMPOUNDS
ROCKS
SCRUBBING
SEDIMENTARY ROCKS
SODIUM COMPOUNDS
SULFUR COMPOUNDS
WASTES
400201* - Chemical & Physicochemical Properties
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)