ASTM D4058-96(2006)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D4058–96 (Reapproved 2006)
Standard Test Method for
Attrition and Abrasion of Catalysts and Catalyst Carriers
This standard is issued under the fixed designation D4058; 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 (´) 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 attri- 4.1 This test method is considered to be a measure of the
tion and abrasion resistance of catalysts and catalyst carriers. It propensity of a catalyst to produce fines in the course of
is applicable to tablets, extrudate, spheres, and irregularly transportation, handling, and use. However, there is no abso-
shaped particles larger than about ⁄16 in. (1.6 mm) and smaller lute level of acceptability. The values obtained are significant
than about ⁄4 in. (19 mm). The materials used in developing principally in relation to values for other materials (or other
the method exhibited losses on attrition less than 7 %; how- samples of the same material) of comparable size.
ever,themethodshouldbeapplicabletomaterialsgivingmuch
5. Apparatus
higher attritions.
1.2 The values stated in inch-pound units are to be regarded 5.1 Acylindricaldrumwithinsidedimensionsof10in.(254
mm) diameter and 6 in. (152 mm) long with a single radial
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only baffle 2 in. (51 mm) high extending the full length of the
cylinder. A lid shall be provided and secured to the container
and are not considered standard.
1.3 This standard does not purport to address all of the withAllen-headscrews,wingnutsorothersuitablemeansasto
ensure that no fines escape during the test. The inside of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- drum should have a surface roughness no greater than about
250 µin. (6.4 µm). (The roughness of cold-rolled steel or a
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. smooth grind on a lathe is satisfactory.) A suitable design is
shown in Fig. 1.
2. Referenced Documents
5.2 Any convenient means of rotation, such as a ball mill
2.1 ASTM Standards: roller, geared to give the desired rate of rotation of the drum.
E177 Practice for Use of the Terms Precision and Bias in
6. Sampling
ASTM Test Methods
E456 Terminology Relating to Quality and Statistics 6.1 Obtain a representative sample of about 110 g of the
material to be tested by gently splitting or quartering. Any
E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method sampling technique requiring extensive agitation or handling
willcausesomeattritionand,therefore,compromisetheresults
3. Summary of Test Method
of the test.
3.1 Asampleofcatalystorcatalystcarrierisrotatedforaset 6.2 Gently sieve the sample on a No. 20 (850-µm) ASTM
period of time in a cylindrical drum having a single baffle. sieve.
Fines produced by attrition and abrasion in the test are 6.3 Transfer the presieved sample to a widemouthed con-
determined by sieving through a standard sieve. tainer tared to the nearest 0.01 g.
6.4 Dry the presieved sample in air for3hat 400°C. It may
be necessary to modify or eliminate this step when testing
This test method is under the jurisdiction of ASTM Committee D32 on
materials that might be decomposed or drastically altered by
Catalysts and is the direct responsibility of Subcommittee D32.02 on Physical–Me-
the drying conditions.
chanical Properties.
Current edition approved April 1, 2006. Published April 2006. Originally
NOTE 1—For example, an activated carbon catalyst may be treated for
approved in 1981. Last previous edition approved in 2001 as D4058 –96(2001).
4 h at 190°C in a vacuum oven.
DOI: 10.1520/D4058-96R06.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.5 Cool the dried sample for at least 30 min in a desiccator
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
using freshly regenerated 4Amolecular sieves as the desiccant.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. The mol
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