VOLATILE MATTER IN GREEN PETROLEUM COKE: D6374
EXPLANATION
The volatile matter of 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. This test method covers the determination of the volatile matter produced by pyrolysis or evolved when petroleum coke is subjected to the specific conditions of the test method. This test method is empirical and requires the entire test procedure to be closely followed to ensure that the results from different laboratories will be comparable. This method is not satisfactory for determining dedusting material content. Samples having a thermal history above 600° C are excluded from this test.
There are two sources of interferences in this test method. Moisture increases the mass loss, and the moisture free sample weight is decreased by the amount of moisture actually present in the test sample. The particle size range of the analysis sample affects the volatile matter. The coarser the sample, the lower the reported volatile matter will be.
TEST SUMMARY
Volatile matter of a moisture free petroleum coke sample is determined by measuring the mass loss of the coke when heated under the exact conditions of this test method.
TEST PRECISION
Repeatability: 0.01905 x (X + 2.826)
Reproducibility: 0.06662 x (X + 2.826)
Where X is the average of two results in weight percent.
Bias is not known.
