ASTM D5159-04(2009)
(Test Method)Standard Guide for Dusting Attrition of Granular Activated Carbon
Standard Guide for Dusting Attrition of Granular Activated Carbon
SIGNIFICANCE AND USE
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.
SCOPE
1.1 This guide presents a procedure for evaluating the resistance to dusting attrition of granular activated carbons. For the purpose of this guide, the dust attrition coefficient, DA, is defined as the weight (or calculated volume) of dust per unit time, collected on a preweighed 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 D2867).
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 guide 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 guide to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D5159 − 04(Reapproved 2009)
Standard Guide for
Dusting Attrition of Granular Activated Carbon
This standard is issued under the fixed designation D5159; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope then collected on a preweighed filter. The quantities of dust
collected in six 10-min intervals are determined by weighings
1.1 This guide presents a procedure for evaluating the
on an analytical balance.
resistancetodustingattritionofgranularactivatedcarbons.For
the purpose of this guide, the dust attrition coefficient, DA, is
4. Significance and Use
defined as the weight (or calculated volume) of dust per unit
time, collected on a preweighed filter, in a given vibrating
4.1 Three forces can mechanically degrade a granular acti-
deviceduringadesignatedtimeperunitweightofcarbon.The
vated carbon: impact, crushing, and attrition. Of these three,
initial dust content of the sample may also be determined.
attrition, or abrasion, is the most common cause of dust
Granular activated carbon is defined as a minimum of 90 %
formation in actual service. Published test procedures to
being larger than 80 mesh (0.18 mm) (see Test Methods
determine the "hardness" of activated carbons produce results
D2867).
that in general cannot be correlated with field experience. For
example, the ball-pan hardness test applies all three forces to
1.2 The values stated in SI units are to be regarded as the
the sample in a variable manner determined by the size, shape,
standard. The inch-pound units given in parentheses are for
and density of the particles. The "stirring bar" abrasion test
information only.
measuresattritionsolongastheparticlesizeissmallerthan12
1.3 This guide does not purport to address all of the safety
mesh.There is some evidence, however, that the results of this
concerns, if any, associated with its use. It is the responsibility
testmethodareinfluencedbyparticlegeometry.Theprocedure
of the user of this guide to establish appropriate safety and
set forth in this guide measures the effect of friction forces
health practices and determine the applicability of regulatory
between vibrating or slowly moving particles during the test
limitations prior to use.
and may be only slightly dependent on particle size, shape and
density effects.
2. Referenced Documents
2.1 ASTM Standards:
5. Apparatus
D2854Test Method for Apparent Density of Activated
5.1 Vibrating Table , capable of providing an RMS (root
Carbon
mean square) acceleration of 40 m/s/s (4 g).
D2867Test Methods for Moisture in Activated Carbon
E11Specification forWovenWireTest Sieve Cloth andTest
5.2 Test Cell, such as shown in Fig. 1, preferably made of
Sieves
aluminum or other electrically conductive material.
E300Practice for Sampling Industrial Chemicals
5.3 Piezoelectric Accelerometer , capable of measuring an
3. Summary of Guide RMSaccelerationchosenbytheuser.Avalueof40m/s/s(4g)
is suitable when using the apparatus in Fig. 1 and Fig. 2.
3.1 A known volume of known weight of the granular
activated carbon is placed in a sample holder and vibrated at
5.4 Signal Conditioner , to interface the accelerometer with
constant acceleration (g) for a known time. The dust is carried
an AC millivolt meter, capable of producing a linear output
by an air stream passing through the vibrating sample and is
voltage from 0 to 1 V-ac, proportional to the acceleration.
This test method is under the jurisdiction of ASTM Committee D28 on
Activated Carbon and is the direct responsibility of Subcommittee D28.04 on Gas A Buffalo Dental Manufacturing Co., (Underhill Blvd., Syosset, NY 11791)
Phase Evaluation Tests. vibrator, Model No. 1, rated 40 W at 115 V, 60 Hz, and a Syntron Model J-1A
CurrenteditionapprovedSept.1,2009.PublishedDecember2009.Lastprevious vibrating jogger, rated 30 W at 115 V, 60 Hz, have been found suitable for this
version approved in 2004 as D5159–04. DOI: 10.1520/D5159-04R09. purpose.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or An Endevco accelerometer, Model No. 2251, has been found suitable for this
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM purpose.
Standards volume information, refer to the standard’s Document Summary page on An Endevco Model 4416 signal conditioner, battery operated, has been found
the ASTM website. suitable for this purpose.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5159 − 04 (2009)
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 E11 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)
NOTE 1—An Endevco accelerator, Model 2250A, has been found satisfactory for this purpose.
FIG. 2 Apparatus Assembly
D5159 − 04 (2009)
NOTE 1—AModel No. 1 vibrator available from Buffalo Dental Mfg., Underhill Blvd., Syosset, NY11791, has been found suitable for this purpose.
FIG. 3 Test Cell Components Requiring Fabrication ( ⁄4 in.=1in. scale)
5.5 Voltmeter , 0 to 1 V-ac. 6. Sampling, Test Specimens, and Test Units
5.6 Ammeter, ac, 0 to 1000 mA accurate to 1 mA.
6.1 Guidanceinsamplinggranularactivatedcarbonisgiven
in Practice E300 (see also 8.1).
5.7 Variable Transformer,0to120V.
5.8 Timer Control, 0 to 120 min.
7. Preparation of Apparatus
5.9 Rubber Isolation Pad, a 45 durometer neoprene rubber
7.1 Assemble a test cell similar to that shown in Fig. 1 and
pad has be
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