Proximate & ultimate analysis of coal

Basics of 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