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Classification of Coals According to Degree of Coalification by Reflectance of the Vitrinite Component.

Authors
McCartney-JT; Teichmuller-M
Source
Fuel 1972 Jan; 51:64-68
Link
NIOSHTIC No.
10010363
Abstract
The utility of reflectance of the vitrinite component of coals as a criterion of degree of coalification has been investigated. Present standard systems for classification of coals by rank are intended mainly as guides for utilization behavior, and there is a need for more widespread acceptance and usage of an objective rank criterion based more firmly on physical/chemical characteristics of a coal. The relations of reflectance of vitrinite to other commonly used or proposed rank parameters have been studied, using voluminous data supplied by United States and European laboratories. These relations were found to be excellent for high-rank bituminous coals, good for anthracitic coals, fair for low-rank bituminous coals, and rather poor for subbituminous coals, lignites, and brown coals. The data for the last category are least numerous, and work is continuing on their reflectance-rank characteristics, especially for the International Commission on Coal Petrology. The reflectance ranges established for present rank categories are listed and it is proposed that they be included in standard classification systems as supplementary criteria of rank.
Publication Date
19720101
Document Type
OP;
Fiscal Year
1972
Identifying No.
OP 62-72
Source Name
Fuel, V. 51, January 1972, PP. 64-68
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division