2. Tests
2.1 Complex materials and special tests
It's important to remember that solid fuels (and coal in particular) are among the most chemically complex materials present in the earth's crust. Developed over the centuries under diverse geological conditions, their analysis is intended to reveal the slow evolution of the plant precursors of which they are composed.
In other words, it's clear that the characteristics of coal from the Asia-Pacific continent have a completely different profile to that of coal from the European continent, and that this difference can also be seen with coal from the North or South American continents. Within the coal seam itself, there are variations linked to deposits in aquatic and anaerobic basins, their chemical alteration, the depth...
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Bibliography
Reference standards
Warning: revision dates are the latest available at the time of publication of this booklet. Standards are revised at regular intervals, so it's important to check for the latest edition.
- Standard terminology of coal and coke. - ASTM D 121 - 2015
- Standard classification of coals by rank. - ASTM D 388 - 2017
- Classification des charbons. - ISO 11760 - 2005
- Solid mineral fuels....
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