Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Variability and correlation in raw and clean coal : measurement and analysis /
Author Cheng, B. ; Crumrine, K. ; Gleit, A. ; Jung, A. ; Sargent, D.
Other Authors
Author Title of a Work
Cheng, B.
CORP Author Versar, Inc., Springfield, VA.;Industrial Environmental Research Lab., Research Triangle Park, NC.
Publisher U.S. Environmental Protection Agency, Industrial Environmental Research Laboratory,
Year Published 1983
Report Number EPA/600/7-83/055; EPA-68-02-2199
Stock Number PB84-118223
Subjects Coal--United States--Testing. ; Coal--Sulfur content--United States. ; Coal--Testing. ; Coal--United States--Sulphur content
Additional Subjects Coal preparation ; Sampling ; Variability ; Sites ; Air pollution ; Desulfurization ; Sulfur ; Sulfur dioxide ; Concentration(Composition) ; Air pollution abatement
Library Call Number Additional Info Location Last
NTIS  PB84-118223 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation 337 pages : illustrations ; 28 cm
The report gives results of the evaluation of coal samples, collected at 1/2- or 1-hour intervals from the inlet to, and outlet from, two coal preparation plants. (The ability of a coal to comply with an emission regulation depends on the statistical characteristics of the coal sulfur content and heat content and the requirements of the regulation. Previous studies of the ability of coal to comply with emission regulations have been hampered by inadequacies in the coal data sets which can be used to statistically characterize the variations in coal properties.) The samples were analyzed for total sulfur, pyrite sulfur, heating value, ash content, and moisture. Values for organic sulfur and SO2 emissions (lb SO2/million Btu) were calculated. Data were evaluated statistically to determine the mean value, variance, relative standard deviation (standard deviation divided by mean), correlation structure, and skewness. Coal cleaning at the plants reduced the mean SO2 emission parameter by about 23 and 63 percent, respectively. The relative standard deviation (RSD) of the SO2 emissions were reduced by 26 and 44 percent, respectively. Differences in the reductions in mean and RSD values between plants resulted primarily from differences in raw coal properties. Model results show the importance of considering the effects of auto-correlations when estimating the potential for exceedance with raw or clean coal.
Caption title. "October 1983." "EPA-600/7-83-055." Microfiche.