Record Display for the EPA National Library Catalog

RECORD NUMBER: 1 OF 2

OLS Field Name OLS Field Data
Main Title Scale control in limestone wet scrubbing systems
Author Wen, C. Y. ; McMichael, W. J. ; Nelsen, Jr, R. D. ; Berkowitz, J. B. ; Shooter., D.
Other Authors
Author Title of a Work
Wen, C.Y.
Borgwardt, R.H.
CORP Author Little (Arthur D.), Inc., Cambridge, Mass.;National Environmental Research Center, Research Triangle Park, N.C. Control Systems Lab.;West Virginia Univ., Morgantown.
Publisher U.S. Environmental Protection Agency, Office of Research and Development,
Year Published 1975
Report Number EPA-650/2-75-031; ADL-C-75092; EPA-68-02-1013; EPA-ROAP-21ACY-038
Stock Number PB-243 309
OCLC Number 55691815
Subjects Sodium sulphate ; Calcium sulphate ; Limestone ; Scrubber (Chemical technology)
Additional Subjects Scale(Corrosion) ; Air pollution control equipment ; Scruffers ; Corrosion prevention ; Additives ; Oxidation ; Calcium inorganic compounds ; Sulfites ; Reaction kinetics ; Limestone ; Sulfur dioxide ; Calcium carbonates ; Inorganic phosphates ; Limestone scrubbing ; Calcium sulfites
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=91007NKL.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJAD  EPA 650/2-75-031 Region 3 Library/Philadelphia, PA 07/02/2004
NTIS  PB-243 309 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation vi, 91 p. : ill. ; 28 cm.
Abstract
The report gives results of tests of a number of phosphate and polymeric additives--which have proven effective in controlling scale in some commercially encountered calcium-containing systems--for scale control potential in limestone wet scrubbers. Additives selected were Lime Treet; Acrysol A-1, A-3, A-5; Calnox 214 DN; Darex 40; Dequest 2000; PD-8; sodium hexametaphosphate; Calgon CL-14; sodium pyrophosphate; Versenex 80; Quadrol; and sodium tripolyphosphate. The kinetics of oxidation of calcium sulfite in clacium carbonate/sulfite slurries was studied and compared with the oxidation of sodium sulfite solutions. Rates of oxidation in the calcium system, found to be proportional to bisulfite ion concentration, increased in the presence of solid calcium sulfite. Therefore the rate of sulfite dissolution is a contributing factor to the oxidation under normal operating conditions. Cationic impurities, such as sodium or magnesium, which can increase bisulfite concentration in solution in the 5-6 pH range, are expected to accelerate oxidation.
Notes
EPA Project Officer: R.H. Borgwardt. Arthur D. Little, Inc. "April 1975." "EPA-650/2-75-031." Control Systems Laboratory, National Environmental Research Center. Also distributed by National Technical Information Service (NTIS) as PB243309. Prepared for the U.S. Environmental Protection Agency