Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Identification of CaSO4 Formed by Reaction of CaO and SO2.
Author Gullett, B. K. ; Bruce, K. R. ;
CORP Author Acurex Corp., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher c1989
Year Published 1989
Report Number EPA-68-02-4701; EPA/600/J-89/007;
Stock Number PB89-236392
Additional Subjects Calcium sulfates ; X ray diffraction ; Air pollution control ; Chemical analysis ; Sulfur dioxide ; Calcium oxides ; Experimental design ; Density(Mass/volume) ; Sorbents ; Mathematical models ; Performance evaluation ; Injection ; Porosity ; Reprints ; Coal fired power plants ; Limestone injection
Library Call Number Additional Info Location Last
NTIS  PB89-236392 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 12/18/1989
Collation 15p
The article discusses the XRD-determination of the identity of CaSO4, formed by the reaction between CaO and SO2, and the support of that determination by density measurements with helium pycnometry. The anhydrous CaS04 compound formed has an orthorhombic crystal structure and an analytically calculated density of 2.98 g/cu cm, versus the JCPDS reported value of 2.995 g/cu cm. The product of this reaction, formed during calcium-based sorbent injection for SO2 removal from coal-fired power plants, has largely been assumed to have a density of 2.61 g/cu cm. Since reaction models must incorporate the product density in determining the rate of sorbent pore blockage or filling, correct identification of the reaction product is crucial.