Proximate & ultimate analysis of coal
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Fixed carbon from proximate analysis measures non-volatile carbon remaining after combustion, while total carbon from ultimate analysis includes some organic carbon lost as emissions. Fixed carbon content rises with increasing coal rank, and is used to define ranks above medium-volatile bituminous coal based on the non-volatile carbon percentage.
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Proximate & ultimate analysis of coal
- 1. Fixed carbon from proximate analysis is a different value than total carbon from ultimate analysis. Total carbon includes some organic carbon that escapes as volatile matter emissions during combustion. Fixed-carbon content increases with rank, and is used to define ranks above medium-volatile bituminous coal. Difference between Fixed carbon Proximate analysis AND Carbon in Ultimate analysis