||Dissolution and crystalization of calcium sulfite platelets /
Gleason, Cynthia L. ;
Rochelle, G. T.
||Texas Univ. at Austin. Dept. of Chemical Engineering.;Environmental Protection Agency, Research Triangle Park, NC. Office of Research and Development.
|| U.S. Environmental Protection Agency, Office of Research and Development, Air and Energy Engineering Research Laboratory,
||EPA/600/D-89/187; AEERL-P-282; EPA-R-812454
Calcium inorganic compounds ;
Air pollution ;
Flue gases ;
Gas scrubbing ;
Sodium sulfates ;
Combustion products ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||20 pages : illustrations ; 28 cm
The paper discusses the dissolution and crystallization of calcium sulfite platelets. The rates of calcium sulfite dissolution and crystallization are important in slurry scrubbing processes for flue gas desulfurization. The rates affect the scrubber solution composition, SO2 absorption, sulfite oxidation, and limestone utilization. The dissolution and crystallization rates of platelet shaped calcium sulfite crystals were measured in the pH stat apparatus. The solution pH was varied from 3.0 to 6.0. The effects of sulfate content in the solids and solution were also investigated. The measured rates for the platelets were compared to the rates previously determined for agglomerates. It was determined that there are subtle differences between platelet and agglomerated calcium sulfite. The platelet sample with low solid sulfate content dissolved and crystallized slower than the sample with a high solid sulfate content and the agglomerated samples. The inhibiting effect of dissolved sulfate was also greater for the low solid sulfate sample. The sample with a high solid sulfate content dissolved and crystallized at approximately the same rate as the agglomerates.
"Contract no. CR 812454-01." "EPA/600/D-89/187." Includes bibliographical references. "Presented at AIChE National Meeting, Houston, TX, 3/29-4/2/87." "Charles B. Sedman, project officer." Microfiche.