Variability and correlation in raw and clean coal: measurement and analysis. Final report Oct 79-Apr 83

Technical Report · Sat Oct 01 04:00:00 EDT 1983

OSTI ID:5288773

Cheng, B; Crumrine, K; Gleit, A; Jung, A; Sargent, D

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 SO/sub 2/ emissions (lb SO/sub 2//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 SO/sub 2/ emission parameter by about 23 and 63 percent, respectively. The relative standard deviation (RSD) of the SO/sub 2/ 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.

• Research Organization: Versar, Inc., Springfield, VA (USA)
• OSTI ID: 5288773
• Report Number(s): PB-84-118223
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
013000 -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
AIR POLLUTION
ASHES
CALORIFIC VALUE
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CLEANING
COAL
COAL PREPARATION
COMBUSTION PROPERTIES
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MINERALS
MOISTURE
NONMETALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
PYRITE
RESIDUES
SAMPLING
SULFIDE MINERALS
SULFIDES
SULFUR
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TRANSITION ELEMENT COMPOUNDS