Record Display for the EPA National Library Catalog

RECORD NUMBER: 257 OF 274

OLS Field Name OLS Field Data
Main Title Survey of Coals Treated by Oxydesulfurization.
Author Warzinski, R. P. ; Ruether, J. A. ; Friedman, S. ; Steffgen, F. W. ;
CORP Author Department of Energy, Pittsburgh, PA. Pittsburgh Energy Technology Center.;Department of Energy, Washington, DC.
Year Published 1979
Report Number EPA-600/7-79-098b-V.2 ;CONF-7809119-3;
Stock Number DE83007323
Additional Subjects Pittsburgh oxydesulfurization process ; Coal ; Coal preparation ; Feasibility studies ; Autoclaves ; Temperature dependence ; Organic sulfur compounds ; Air ; Water ; Pressure dependence ; Pyrite ; Oxidation ; Heat losses ; Time dependence ; Chemical reactions ; Comparative evaluations ; Sulfur content ; Sulfur ; Chemical state ; Ashes ; Calorific value ; Coal rank ; Correlations ; Chemical reactors ; Flowsheets ; Experimental data ; ERDA/013000 ; ERDA/010600
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  DE83007323 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 24p
Abstract
The feasibility of using only compressed air and water at elevated temperature to reduce the sulfur content of coal has been demonstrated in autoclave experimentation at the Pittsburgh Energy Technology Center for various coals from most of the major coal basins in the United States. This air/water oxydesulfurization consistently removes in excess of 90 percent of the pyritic sulfur and has the potential for reducing the organic sulfur content by up to 40 percent. The sulfur liberated from coal by this reaction is present in the aqueous effluent as dilute sulfuric acid which can be neutralized with limestone. Under certain reaction conditions pyrite forms a jarosite intermediate which reports as organic sulfur in chemical analysis. Extent of organic sulfur removal and loss of heating value increase with temperature in the range 170 exp 0 -200 exp 0 C. (ERA citation 08:022992)