ASTM-D2798 › Standard Test Method for Microscopical Determination of the Vitrinite Reflectance of Coal
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Scope
1.1 This test method covers the microscopical determination of both the mean maximum and mean random reflectances measured in oil of polished surfaces of vitrinite and other macerals present in coals ranging in rank from lignite to anthracite. This test method can be used to determine the reflectance of other macerals.
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Significance and Use
5.1 The mean maximum reflectance of the vitrinite component in coal as determined by this test method is often used as an indicator of rank as presented in Classification D388, independent of petrographic composition, and in the characterization of coal as feedstock for carbonization, gasification, liquefaction, and combustion processes.
5.2 This test method is for use in scientific and industrial research.
Keywords
coal; maceral; microscopy; rank; reflectance; vitrinite;
To find similar documents by ASTM Volume:
05.06 (Gaseous Fuels; Coal and Coke)
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Document Number
ASTM-D2798-21
Revision Level
2021 EDITION
Status
Current
Modification Type
Revision
Publication Date
June 11, 2021
Document Type
Test Method
Page Count
6 pages
Committee Number
D05.28