Data Base for the Analysis of Compositional Characteristics of Coal Seams and Macerals. Technical Progress Report, August 1982-January 1983

摘要

The basic objectives of this program are, first, to understand the systematic relationships between the properties of coals, and second, to determine the nature of the lateral and vertical variability in the properties of a single seam. A total of seventy samples were collected from the Rocky Mountain and Northern Great Plains provinces. Five hundred and five data printouts and 156 coal samples were provided on request to other agencies involved in coal research. Analysis of variance studies were performed on a set of seam subsamples from 84 localities using inorganic components as variables. Results of tests for variability between localities and between levels in seams are presented. For the majority of inorganic variables considered, levels of variables are different between localities but not between subsample levels within seams. Frequency distribution histograms for ash-basis variables of the previously reported whole-seam data set are presented. The surface areas of coals measured from CO sub 2 and water adsorption isotherms at 298 K are reported. Water surface areas, which decrease with increasing rank, are much less than CO sub 2 areas except in the case of low-rank coals. Swelling of coals, varying in rank from lignite to anthracite, in water has been studied by comparing the solvent sorption measured by pycnometric and gravimetric methods. Swelling increases with decreasing rank. Low-rank coals show considerable swelling in water. 21 references, 28 figures, 21 tables. (ERA citation 09:009261)