Standard Guide for Dusting Attrition of Granular Activated Carbon

Importancia y uso:

4.1 Three forces can mechanically degrade a granular activated carbon: impact, crushing, and attrition. Of these three, attrition, or abrasion, is the most common cause of dust formation in actual service. Published test procedures to determine the “hardness” of activated carbons produce results that in general cannot be correlated with field experience. For example, the ball-pan hardness test applies all three forces to the sample in a variable manner determined by the size, shape, and density of the particles. The “stirring bar” abrasion test measures attrition so long as the particle size is smaller than 12 mesh. There is some evidence, however, that the results of this test method are influenced by particle geometry. The procedure set forth in this guide measures the effect of friction forces between vibrating or slowly moving particles during the test and may be only slightly dependent on particle size, shape, and density effects.

Subcomité:

D28.04

Volúmen:

15.01

Número ICS:

19.120 (Particle size analysis. Sieving), 71.040.30 (Chemical reagents)

Palabras clave:

activated carbon; attrition; dusting; granular;