Sulfur reduction potential of the bituminous coals of Pennsylvania. [Extensive washability data for PA coals]

Technical Report · Sun Aug 01 04:00:00 EDT 1982

OSTI ID:5011090

Wizzard, J T; Cavallaro, J A; Deurbrouck, A W

This report presents the results of a washability study of 205 raw coal channel samples with an emphasis on sulfur reduction. These raw coals contained on the average 14.8% ash, 1.73% pyritic sulfur, 2.52% total sulfur, 12,812 Btu/lb, and 4.0 pounds of SO/sub 2/ emissions per million Btu, on a moisture free basis. The complete washability data and ultimate-proximate data are presented for these samples. Each individual washability analysis is presented in Appendix A. Statistical evaluations of the washability data and ultimate-proximate analyses are presented on a coalbed basis, whenever there are six or more samples from a given coalbed. An additional evaluation is included showing the composite data interpolated at Btu recovery levels of 50, 60, 70, 80, 90, and 100%. Graphical representations are given for various coal characteristics of both raw and washed coal fractions for all coalbeds with six or more samples. For coalbeds with 20 or more samples, goodness-of-fit tests were made comparing SO/sub 2/ distributions with both normal and log-normal distributions. Confidence intervals and tolerance limits are calculated and illustrated for the SO/sub 2/ emission values as a function of specific gravity for these coalbeds. In general, ash reduction, pyritic sulfur reduction, total sulfur reduction, and SO/sub 2/ emissions reduction increase as the coal is crushed to smaller top sizes and as the coal is cleaned at lower specific gravities. This report presents the reduction curves for the ten major coalbeds in Pennsylvania's Main Bituminous Coalfield.

• Research Organization: Department of Energy, Pittsburgh, PA (USA). Pittsburgh Energy Technology Center
• OSTI ID: 5011090
• Report Number(s): DOE/PETC/TR-82/15; ON: DE82022070
• Country of Publication: United States
• Language: English

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