Record Display for the EPA National Library Catalog

RECORD NUMBER: 31 OF 100

OLS Field Name OLS Field Data
Main Title Effects of Magnesium and Chloride Ions on Limestone Dual Alkali System Performance.
Author Chang, J. C. S. ; Kaplan, N. ; Brna, T. G. ;
CORP Author Acurex Corp., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Year Published 1985
Report Number EPA-68-02-3648; EPA/600/D-85/170;
Stock Number PB85-238483
Additional Subjects Air pollution control ; Magnesium ; Chlorides ; Calcium carbonates ; Flue gases ; Desulfurization ; Sulfur dioxide ; Scrubbers ; Stationary sources ; Dual alkali processes
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB85-238483 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 22p
Abstract
The paper gives results of pilot plant tests to evaluate the effects of magnesium and chloride ions on system performance of limestone-regenerated dual alkali processes under closed-loop operating conditions. It was found that limestone reactivity and solids dewatering properties are very sensitive to magnesium ion concentrations. The total magnesium ion concentration should be maintained below 1000 ppm for satisfactory performance under normal operation. A model which assumes competitive surface adsorption of calcium and magnesium ions was used to interpret the data. Limestone reactivity and solids dewatering properties decreased with the increase of chloride ion concentrations; however, the effect of chloride ion accumulation was not significant until the concentration reached 80,000 ppm.