Main Title |
Electron Paramagnetic Resonance (EPR) Investigation of Limestones and Their Calcines and Correlation with Reactivity with Acid Gases. |
Author |
Ashfor, Nicholas A. ;
Jark, Frank H. ;
|
CORP Author |
IIT Research Inst., Chicago, Ill. |
Year Published |
1972 |
Report Number |
IITRI-C6241-7; EPA-68-02-0208; R2-72-019; |
Stock Number |
PB-211 504 |
Additional Subjects |
( Limestone ;
Electron paramagnetic resonance) ;
( Calcium oxides ;
Electron paramagnetic resonance) ;
( Carbonate rocks ;
Electron paramagnetic resonance) ;
Crystal structure ;
Chemical reactions ;
Sulfur dioxide ;
Roasting ;
Slaking ;
Air pollution ;
Hydration ;
Control ;
Manganese ;
Correlation ;
Geochemistry ;
Iron ;
Trace elements ;
Limestone scrubbing ;
Air pollution control
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-211 504 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
78p |
Abstract |
A research program was undertaken to investigate a selected set of calcined and uncalcined carbonate rock samples by electron paramagnetic resonance (EPR) spectroscopy in order to assist in the characterization of marls and chalks to identify properties which account for their high reactivity with SO2, establish a semi-quantitative basis for evaluating a crystalline order of limestones to predict their reactivity with acid gases, investigate the effect of altering the calcination temperature on the crystalline structure of calcines in order to identify those properties which account for the varying reactivity and deadburning, and investigate the effects of slaking on the crystalline parameters of calcines produced at different temperatures in order to support wet limestone scrubbing process development using manganese ions as a probe of calcium carbonate crystallinity, the fitting of manganese EPR line width data to the SO2 reactivity and capacity data resulted in correlation coefficients of r = 0.55 and 4 = 0.49 respectively. No significant EPR linewidth correlation was found for the reactivity and capacity of calcined materials. (Author) |
NTIS Title Notes |
Final rept. 23 Jun 70-22 Jan 72. |
PUB Date Free Form |
18 Feb 72, |
Category Codes |
8D; 7D; 64C; 68A; 59G |
NTIS Prices |
PC A05/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
326531757 |
Origin |
NTIS |
Type |
CAT |