Actions for Petrographic characterization of Kentucky coals. Final report. Part VI. The nature of pseudovitrinites in Kentucky coals [electronic resource].

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Petrographic characterization of Kentucky coals. Final report. Part VI. The nature of pseudovitrinites in Kentucky coals [electronic resource].

Published
Lexington, Ky. : University of Kentucky, 1984.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 82 : digital, PDF file
Additional Creators
University of Kentucky and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Overall average pseudovitrinite content for 1055 eastern Kentucky coal samples is nearly 9% while average percentage of pseudovitrinite for 551 western Kentucky coals is approximately 4%. Examination of variation in pseudovitrinite content relative to rank changes shows uniformity in pseudovitrinite percentages within the 4 to 7 V-type interval for eastern Kentucky coals but a gradual increase in pseudovitrinite content for western Kentucky coals over the same rank interval. Coals from both coal fields show similar, distinct increases in pseudovitrinite percentage in the highest V-type categories. However, it is suggested here that these supposed increases in pseudovitrinite percentages are not real but rather, indicate distinct increase in the brightness of nitrinite resulting from increased alteration of vitrinite beginning at this stage of coalification and continuing into the higher rank stages. This conclusion is reached when it is found that differences between pseudovitrinite and vitrinite reflectance are least in coals at these high rank intervals of Kentucky and, also, when vitrinite particles are often visually observed having brightness equal to that of pseudovitrinite particles. Relation of pseudovitrinite to other sulfur forms and total sulfur in general shows no significant trends, although the relatively high pyritic sulfur content in western Kentucky coals, coupled with relatively low inert percentages suggest the existence of predominantly reducing, or at least non-oxidizing conditions in the Pennsylvanian peat swamps of western Kentucky. Initial work involving Vicker's microhardness testing of coals indicates that microhardness values for pseudovitrinite are higher than those for vitrinite within the same sample regardless of coal rank or coal field from which the sample was collected. 15 references, 9 figures, 9 tables.
Report Numbers
E 1.99:doe/pc/30223-14
doe/pc/30223-14
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Other Subject(s)
Note
Published through SciTech Connect.
02/01/1984.
"doe/pc/30223-14"
"DE84006995"
Hower, J.C.; Trinkle, E.J.
Funding Information
FG22-80PC30223
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