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Characterization of the Inorganic Constituents in Coal

Published online by Cambridge University Press:  25 February 2011

R. B. Finkelman
R. B. Finkelman*
Affiliation:
Exxon Production Research Co., P.O. Box 2189, Houston, TX 77001
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Anticipating the environmental effects of utilization or disposal of coal combustion and conversion by-products requires proper characterization of the inorganic constituents in coal. Inorganic constituents include minerals as well as the organically associated inorganic elements. Characterization of these constituents should not be limited to the types and abundances of the minerals and elements, but should also include their modes of occurrence (Table I and Figures 1–4). Information on modes of occurrence should include the textural relationships of the minerals and the chemical form of the elements (i.e. organic/inorganic associations). This will enable us to predict better how the inorganic constituents will behave upon cleaning, combustion, conversion, or leaching of the coal. For example, chalocophile elements (As, Bi, Cd, Cu, Hg, Pb, Se, Sb, Tl, Zn) associated with secondary cleat (vertical breaks in the coal) or with vein filling sulfides will likely be removed during coal cleaning. In contrast, these elements, when associated with dispersed accessory sulfides and selenides [sphalerite (ZnS), clausthalite (PbSe), chalcopyrite (CuFeS2), galena (PbS)] are commonly concentrated in the cleaned coal. Calcium present in coal as a carbonate would respond to technological processes in a different way than calcium present in organic association or as calcium sulfate, phosphate or silicate.

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Articles
Information
MRS Online Proceedings Library (OPL) , Volume 65: Symposium T – Fly Ash and Coal Conversion By-Products II , 1985 , 71
Copyright
Copyright © Materials Research Society 1986

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References

1. Finkelman, R.B., Modes of Occurrence of Trace Elements in Coal, U.S. Geological Survey Open-File Report 81–99, 322 pp. (1981).CrossRefGoogle Scholar
2. Finkelman, R.B., in Atomic and Nuclear Methods in Fossil Energy Research, edited by Filby, R.H., Carpenter, B.S., Raganini, R.C. (Plenum Publishing Corporation, New York, 1982), pp. 141–149.CrossRefGoogle Scholar
3. Finkelman, R.B., Fiene, F.L., Miller, R.N., and Simon, F.O., Interlaboratory Comparison of Mineral Constituents in a Sample from the Herrin (No. 6) Coal Bed from Illinois, U.S. Geological Survey Circular 932, 42pp. (1984).Google Scholar
4. Finkelman, R.B. and Gluskoter, H.J., in Fouling and Slagging Resulting from Impurities in Combustion Gases, edited by Bryers, R.W. (Engineering Foundation, New York, 1983), pp. 299–318.Google Scholar
5. Finkelman, R.B. and Stanton, R.W., Fuel, 57, 763–768 (1978).Google Scholar
6. Gluskoter, H.J., Shimp, N.F., and Rush, R.R., in Chemistry of Coal Utilization, 2nd Supplementary Volume, edited by Elliot, M.A. (John Wiley Publishing Co., New York 1981), pp. 369–424.Google Scholar
7. Swaine, D.J., in The Significance of Trace Elements in Solving Petrogenetic Problems and Controversies, edited by Augusthithis, S.S. (Theophrastus Publications S.A., Athens, Greece 1983), pp. 521–532.Google Scholar
8. Swaine, D.J., CRC Critical Reviews in Analytical Chemistry, 15, 4, 315–346 (1985).Google Scholar