Air dried basis: The coal has naturally dried in the open air until it cannot dry or dissipate any more moisture. ... Dry basis: An analysis expressed on the basis of a coal sample from which the total moisture has in theory been removed. Coal in dry basis includes all contents but moisture.
How is air dry basis calculated?
- Air Dry. Dry Basis.
- As Received. - multiply.
- ar by: 100 - IM%
- ad by: —
- db by: 100 - IM%
What is VM in coal?
Coal analysis
Volatile matter (VM) is the percentage loss in mass, adjusted for moisture, when coal is heated out of contact with air under standard conditions.
