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Erschienen in:
2015 | OriginalPaper | Buchkapitel
4. Coals
verfasst von : Jan Schwarzbauer, Branimir Jovančićević
Erschienen in: Fossil Matter in the Geosphere
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Abstract
According to some estimates, coal reserves in the Earth’s crust represent several tens of times greater accumulation of organic carbon than all the oil and gas deposits together. Hence, the coals are still considered energy and raw material source of immense importance in spite of today’s understandably favoured extensive use of oil and gas. Definitions and coal terminology, organic geochemistry of coals, certain major types of humic coals, chemical nature and composition and properties of coals will be discussed here in more detail.