ASTM D5159-91(1997)
(Test Method)Standard Test Method for Dusting Attrition of Granular Activated Carbon
Standard Test Method for Dusting Attrition of Granular Activated Carbon
SCOPE
1.1 This test method covers the determination of the dusting attrition of granular activated carbons. For the purpose of this test method, the dust attrition coefficient, DA , is defined as the weight (or calculated volume) of dust per unit time, collected on a preweighed glass-fiber filter, in a given vibrating device during a designated time per unit weight of carbon. The initial dust content of the sample may also be determined. Granular activated carbon is defined as a minimum of 90% being larger than 80 mesh (0.18 mm) (see Test Methods D 2867).
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D 5159 – 91 (Reapproved 1997)
Standard Test Method for
Dusting Attrition of Granular Activated Carbon
This standard is issued under the fixed designation D 5159; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This test method covers the determination of the dusting 4.1 Three forces can mechanically degrade a granular acti-
attrition of granular activated carbons. For the purpose of this vated carbon: impact, crushing, and attrition. Of these three,
test method, the dust attrition coefficient, DA, is defined as the attrition, or abrasion, is the most common cause of dust
weight (or calculated volume) of dust per unit time, collected formation in actual service. Published test procedures to
on a preweighed glass-fiber filter, in a given vibrating device determine the “hardness” of activated carbons produce results
during a designated time per unit weight of carbon. The initial that in general cannot be correlated with field experience. For
dust content of the sample may also be determined. Granular example, the ball-pan hardness test applies all three forces to
activated carbon is defined as a minimum of 90 % being larger the sample in a variable manner determined by the size, shape,
than 80 mesh (0.18 mm) (see Test Methods D 2867). and density of the particles. The “stirring bar” abrasion test
1.2 The values stated in SI units are to be regarded as the measures attrition so long as the particle size is smaller than 12
standard. The inch-pound units given in parentheses are for mesh. There is some evidence, however, that the results of this
information only. test method are influenced by particle geometry. This test
1.3 This standard does not purport to address all of the method measures the effect of friction forces between vibrating
safety concerns, if any, associated with its use. It is the or slowly moving particles during the test and may be only
responsibility of the user of this standard to establish appro- slightly dependent on particle size, shape and density effects.
priate safety and health practices and determine the applica-
5. Apparatus
bility of regulatory limitations prior to use.
5.1 Vibrating Table , capable of providing an RMS (root
2. Referenced Documents
mean square) acceleration of 40 m/s/s (4 g).
2.1 ASTM Standards: 5.2 Test Cell, as shown in Fig. 1, made of aluminum.
D 2854 Test Method for the Apparent Density of Activated 5.3 Piezoelectric Accelerometer ,, capable of measuring an
Carbon RMS acceleration of 40 m/s/s (4 g), with an output signal
D 2867 Test Methods for Moisture in Activated Carbon between 5 and 20 m V-ac/peak g.
E 11 Specification for Wire-Cloth Sieves for Testing Pur- 5.4 Signal Conditioner, to interface the accelerometer with
poses an a-c millivolt meter, capable of producing a linear output
E 300 Practice for Sampling Industrial Chemicals voltage from 0 to 100 mV-ac, proportional to the acceleration.
5.5 Voltmeter , 0 to 100 m-ac.
3. Summary of Test Method
5.6 Ammeter, ac, 0 to 1000 mA accurate to 1 mA.
3.1 A specified volume of known weight of the granular 5.7 Variable Transformer,0to120 V.
activated carbon is placed in the prescribed sample holder and
5.8 Timer Control, 0 to 120 min.
vibrated at constant acceleration (g) for a specified time. The 5.9 Isolation Pad, cross-ribbed 9.5 mm ( ⁄8 in.) thick by 100
dust is carried by an air stream passing through the vibrating
mm (3.94 in.) square constructed from 45 durometer neoprene
sample and is then collected on a preweighed glass-fiber filter. rubber.
The quantities of dust collected in six 10-min intervals are
determined by weighings on an analytical balance.
A Buffalo Dental Manufacturing Co., (Underhill Blvd., Syosset, NY 11791)
vibrator, Model No. 1, rated 40 W at 115 V, 60 Hz, and a Syntron Model J-1A
vibrating jogger, rated 30 W at 115 V, 60 Hz, have been found suitable for this
This test method is under the jurisdiction of ASTM Committee D-28 on purpose.
Activated Carbon and is the direct responsibility of Subcommittee D28.04 on Gas An Endevco accelerometer, Model No. 2251, has been found suitable for this
Phase Evaluation Tests. purpose.
Current edition approved Aug. 15, 1991. Published December 1991. An Endevco Model 4416 signal conditioner, battery operated, has been found
Annual Book of ASTM Standards, Vol 15.01. suitable for this purpose.
3 8
Annual Book of ASTM Standards, Vol 14.02. A Keithley 179 digital multimeter, available from Keithley Instruments, Aurora
Annual Book of ASTM Standards, Vol 15.05. Rd., Cleveland, OH 44139, has been found suitable for this purpose.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 5159
3 1
NOTE 1—2 ⁄4 in. (69.9 mm) inside diameter by 3 in. (76.2 mm) outside diameter by ⁄16 in. (1.6 mm) thick.
NOTE 2— Specification E 11 wire cloth, 250 μm, stainless wire, 3 in. (76.2 mm) diameter.
NOTE 3—37 % open area, fabricated from 24 gage stainless steel with 0.45 in. (11.4 mm) diameter holes on 0.066 in. (1.68 mm) centers, square grid
3 in. (76.2 mm) diameter.
FIG. 1 Dust Attrition Cell (full scale)
5.10 Flowmeter, with flow control valve having a capacity 8. Procedure
from 1 to 12 L/min.
8.1 Measure 100 mL of the sample into a tared, graduated
5.11 Glass-Fiber Filter, 75 mm in diameter, having an
cylinder using the method and apparatus described in Test
efficiency of 99.9 % for 0.3 μm particles. Several commercial
Method D 2854 and weigh to the nearest 0.1 g. If the average
glass fiber filters have been found satisfactory.
nominal particle size of the sample is less than 12 mesh, a 50
5.12 Graduated Cylinder, 100 mL capacity.
mL sample may be used.
5.13 Analytical Balance, capable of weighing to 0.1 mg.
8.1.1 Reproducibility in duplicate or quadruplicate determi-
nations may be improved by taking two or four times the
6. Sampling, Test Specimens, and Test Units
volume of the given sample and making one
...
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