Record Display for the EPA National Library Catalog

RECORD NUMBER: 35 OF 48

OLS Field Name OLS Field Data
Main Title Precipitation chemistry of magnesiun sulfite hydrates in magnesium oxide scrubbing /
Author Lowell, Philip S. ; Meserole, Frank B. ; Parsons., Terry B.
Other Authors
Author Title of a Work
Meserole, Frank B.,
Parsons, Terry B.,
CORP Author Radian Corp., Austin, Tex.;Industrial Environmental Research Lab., Research Triangle Park, N.C.
Publisher Environmental Protection Agency, Office of Research and Development, Office of Energy, Minerals, and Industry, Industrial Environmental Research Laboratory ; For sale by the National Technical Information Service,
Year Published 1977
Report Number EPA-600/7-77-109; EPA-68-02-1319
Stock Number PB-277 086
OCLC Number 04019624
ISBN pbk.
Subjects Scrubber (Chemical technology) ; Precipitation (Chemistry)
Additional Subjects Air pollution control ; Scrubbers ; Precipitation(Chemistry) ; Sulfur dioxide ; Magnesium inorganic compounds ; Hydrates ; Design criteria ; Nucleation ; Industrial wastes ; Combustion products ; Technology ; Flue gases ; Magnesium oxide scrubbing ; Magnesium sulfite hydrates ; Wet methods
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=94001ZI4.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBD  EPA 600-7-77-109 Headquarters Library/Washington,DC 02/19/2019
EKAM  EPA-600/7-77-109 Region 4 Library/Atlanta,GA 07/08/1994
ELBD RPS EPA 600-7-77-109 repository copy AWBERC Library/Cincinnati,OH 10/17/2014
ESAD  EPA 600-7-77-109 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-277 086 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation vi, 368 pages : illustrations ; 27 cm.
Abstract
The report gives results of laboratory studies defining the precipitation chemistry of MgSO3 hydrates. The results apply to the design of Mg-based scrubbing processes for SO2 removal from combustion flue gas. In Mg-based scrubbing processes, MgSO3 precipitates as either trihydrate or hexahydrate. The hydrate formed depends on equipment design and operating conditions. Theoretical prediction, verified experimentally, indicated that MgSO3 trihydrate is the theromodynamically stable hydrate formed at scrubbing process conditions. MgSO3 hexahydrate is formed as a metastable solid due to kinetic phenomena. Nucleation and crystal growth rates are much faster for hexahydrate than for trihydrate. The time scales observed in kinetic experiments at scrubbing process conditions are: hexahydrate precipitation (10's of minutes), hexahydrate dissolution and trihydrate precipitation (100's of minutes), and attainment of trihydrate equilibrium (1000's of minutes). Nucleation plays a dominant role in the formation of trihydrate solids. These results indicate that Mg-based scrubbing process can be designed to precipitate a majority of either hydrate form. Important design variables include scrubbing liquor composition and temperature, seed crystal composition, slurry volume, equipment residence times, and energy inputs to the slurry that influence nucleation.
Notes
Prepared by Radian Corporation under contract no. 68-02-1319, task nos. 36 and 54, program element no. EHE528. Issued Sept. 1977. Includes bibliographical references.