VOLATILES MATTER IN PETROLEUM COKE: ASTM D4421
EXPLANATION
The volatile matter in petroleum coke affects the density of coke particles and can affect artifacts produced from further processing of the coke. The volatile matter can be used in estimating the calorific value of coke. Samples having a thermal history above 600° C are excluded. The test method is also not satisfactory for dedusting material content. This test method is empirical and requires the entire test procedure to be closely followed to ensure results from different laboratories to be comparable.
TEST SUMMARY
Volatile matter of a moisture free petroleum coke is determined by measuring the mass loss of the coke when heated under the exact conditions of this procedure. The particle size range of the sample affects the volatile matter. The coarser the sample, the lower the volatile matter will be. Particular care must be taken against mechanical defects in the furnace operations.
TEST PRECISION
This test method has a repeatability of 0.08X and a reproducibility of 0.21X where X is the average of two results in mass %.
Bias for this test method is not applicable.
