ASTM D5159-04
(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 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 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.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D5159 – 04
Standard Guide for
1
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 collected in six 10-min intervals are determined by weighings
on an analytical balance.
1.1 This guide presents a procedure for evaluating the
resistancetodustingattritionofgranularactivatedcarbons.For
4. Significance and Use
the purpose of this guide, the dust attrition coefficient, DA, is
4.1 Three forces can mechanically degrade a granular acti-
defined as the weight (or calculated volume) of dust per unit
vated carbon: impact, crushing, and attrition. Of these three,
time, collected on a preweighed filter, in a given vibrating
attrition, or abrasion, is the most common cause of dust
deviceduringadesignatedtimeperunitweightofcarbon.The
formation in actual service. Published test procedures to
initial dust content of the sample may also be determined.
determine the 9hardness9 of activated carbons produce results
Granular activated carbon is defined as a minimum of 90 %
that in general cannot be correlated with field experience. For
being larger than 80 mesh (0.18 mm) (see Test Methods
example, the ball-pan hardness test applies all three forces to
D2867).
the sample in a variable manner determined by the size, shape,
1.2 The values stated in SI units are to be regarded as the
and density of the particles. The 9stirring bar9 abrasion test
standard. The inch-pound units given in parentheses are for
measuresattritionsolongastheparticlesizeissmallerthan12
information only.
mesh.There is some evidence, however, that the results of this
1.3 This guide does not purport to address all of the safety
testmethodareinfluencedbyparticlegeometry.Theprocedure
concerns, if any, associated with its use. It is the responsibility
set forth in this guide measures the effect of friction forces
of the user of this guide to establish appropriate safety and
between vibrating or slowly moving particles during the test
health practices and determine the applicability of regulatory
and may be only slightly dependent on particle size, shape and
limitations prior to use.
density effects.
2. Referenced Documents
5. Apparatus
2
2.1 ASTM Standards:
3
5.1 Vibrating Table , capable of providing an RMS (root
D2854 Test Method for Apparent Density of Activated
mean square) acceleration of 40 m/s/s (4 g).
Carbon
5.2 Test Cell, such as shown in Fig. 1, preferably made of
D2867 Test Methods for Moisture in Activated Carbon
aluminum or other electrically conductive material.
E11 SpecificationforWovenWireTestSieveClothandTest
4
5.3 Piezoelectric Accelerometer , capable of measuring an
Sieves
RMSaccelerationchosenbytheuser.Avalueof40m/s/s(4g)
E300 Practice for Sampling Industrial Chemicals
is suitable when using the apparatus in Fig. 1 and Fig. 2.
5
3. Summary of Guide 5.4 Signal Conditioner , to interface the accelerometer with
an AC millivolt meter, capable of producing a linear output
3.1 A known volume of known weight of the granular
voltage from 0 to 1 V-ac, proportional to the acceleration.
activated carbon is placed in a sample holder and vibrated at
6
5.5 Voltmeter , 0 to 1 V-ac.
constant acceleration (g) for a known time. The dust is carried
5.6 Ammeter, ac, 0 to 1000 mA accurate to 1 mA.
by an air stream passing through the vibrating sample and is
5.7 Variable Transformer,0to120V.
then collected on a preweighed filter. The quantities of dust
3
A Buffalo Dental Manufacturing Co., (Underhill Blvd., Syosset, NY 11791)
1
This test method is under the jurisdiction of ASTM Committee D28 on vibrator, Model No. 1, rated 40 W at 115 V, 60 Hz, and a Syntron Model J-1A
Activated Carbon and is the direct responsibility of Subcommittee D28.04 on Gas vibrating jogger, rated 30 W at 115 V, 60 Hz, have been found suitable for this
Phase Evaluation Tests. purpose.
4
Current edition approved Feb. 1, 2004. Published March 2004. Last previous An Endevco accelerometer, Model No. 2251, has been found suitable for this
version approved in 1997 as D5159–91 (1997). DOI: 10.1520/D5159-04. purpose.
2 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or An Endevco Model 4416 signal conditioner, battery operated, has been found
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM suitable for this purpose.
6
Standards volume information, refer to the standard’s Document Summary page on AKeithley179digitalmultimeter,availablefromKeithleyInstruments,Aurora
the ASTM website. Rd., Cleveland, OH 44139, has been found suitable
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.