TAPPI T 684 om-15 determines the gross (or high) heating value of black liquor, containing up to 55% by mass of water, derived from sodium-base kraft.
The products of combustion in the recovery furnace are different from the bomb calorimeter productsbecause of the reducing atmosphere which exists in the hearth zone of the furnace. A "heat of reaction correction" based on an elemental analysis of the waste liquor sample should be used to account for this difference. It is described in a TAPPI Steam and Power Committee Technical Information Sheet for calculation of recovery unit performance (TIP 0416-01 "Recovery Boiler Performance Calculation - Short Form").
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Published: 2015 Number of Pages: 7 File Size: 1 file , 72 KB