Question

what are the significance of volatile content determination of coal​

Answer 1

Answer:

Along with moisture and ash contents, the percentage of volatile matter in a coal sample is needed to calculate the fixed-carbon content of a coal. Many electric utilities prefer coals within a narrow range of volatile matter (25 to 35 percent) for optimal flame stability in the boiler (Thomas, 1992).

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Answer 2

Answer:

Volatile matter is directly related to coal rank; as rank increases, volatile matter content decreases (Stach and others, 1982). Volatile matter has the opposite trend of fixed carbon with rank. As volatile matter is driven from the coal matrix with increasing rank, the relative carbon percentage tends to increase. Both volatile matter and fixed carbon are used to define coal rank in high-volatile, medium-volatile bituminous, and higher-rank coals in the U.S. classification system (ASTM method D388-12; American Society for Testing and Materials, 2013, p. 390–396). Along with moisture and ash contents, the percentage of volatile matter in a coal sample is needed to calculate the fixed-carbon content of a coal.