ASTM D4058-96(2001)

Standard Test Method for Attrition and Abrasion of Catalysts and Catalyst Carriers

SCOPE
1.1 This test method covers the determination of the attrition and abrasion resistance of catalysts and catalyst carriers. It is applicable to tablets, extrudate, spheres, and irregularly shaped particles larger than about 1/16 in. (1.6 mm) and smaller than about 3/4 in. (19 mm). The materials used in developing the method exhibited losses on attrition less than 7%; however, the method should be applicable to materials giving much higher attritions.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values 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.

General Information

• Status: Historical
• Publication Date: 09-Sep-1996
• ICS: 71.040.30 - Chemical reagents
• Technical Committee: D32 - Catalysts
• Drafting Committee: D32.02 - Physical-Mechanical Properties

Relations

• Replaces: ASTM D4058-96 - Standard Test Method for Attrition and Abrasion of Catalysts and Catalyst Carriers
• Effective Date: 10-Sep-1996
• Replaced By: ASTM D4058-96(2006) - Standard Test Method for Attrition and Abrasion of Catalysts and Catalyst Carriers
• Effective Date: 01-Apr-2006
• Referred By: ASTM D8353-20 - Standard Guide for Determination of Individual Particle Strength of Low Surface Area Catalysts and Catalyst Carriers by Drop Test onto a Steel Plate
• Effective Date: 10-Sep-1996

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4058–96 (Reapproved 2001)
Standard Test Method for
Attrition and Abrasion of Catalysts and Catalyst Carriers
This standard is issued under the fixed designation D 4058; 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 principally in relation to values for other materials (or other
samples of the same material) of comparable size.
1.1 This test method covers the determination of the attri-
tion and abrasion resistance of catalysts and catalyst carriers. It
5. Apparatus
is applicable to tablets, extrudate, spheres, and irregularly
5.1 Acylindricaldrumwithinsidedimensionsof10in.(254
shaped particles larger than about ⁄16 in. (1.6 mm) and smaller
mm) diameter and 6 in. (152 mm) long with a single radial
than about ⁄4 in. (19 mm). The materials used in developing
baffle 2 in. (51 mm) high extending the full length of the
the method exhibited losses on attrition less than 7 %; how-
cylinder. A lid shall be provided and secured to the container
ever,themethodshouldbeapplicabletomaterialsgivingmuch
withAllen-headscrews,wingnutsorothersuitablemeansasto
higher attritions.
assure that no fines escape during the test. The inside of the
1.2 The values stated in inch-pound units are to be regarded
drum should have a surface roughness no greater than about
as the standard. The values given in parentheses are for
250 µin. (6.4 µm). (The roughness of cold-rolled steel or a
information only.
smooth grind on a lathe is satisfactory.) A suitable design is
1.3 This standard does not purport to address all of the
shown in Fig. 1.
safety concerns, if any, associated with its use. It is the
5.2 Any convenient means of rotation, such as a ball mill
responsibility of the user of this standard to establish appro-
roller, geared to give the desired rate of rotation of the drum.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
6. Sampling
2. Referenced Documents 6.1 Obtain a representative sample of about 110 g of the
material to be tested by gently “splitting” or quartering. Any
2.1 ASTM Standards:
sampling technique requiring extensive agitation or handling
E 177 Practice for Use of the Terms Precision and Bias in
2 willcausesomeattritionand,therefore,compromisetheresults
ASTM Test Methods
2 of the test.
E 456 Terminology Relating to Quality and Statistics
6.2 Gently sieve the sample on a No. 20 (850-µm) ASTM
E 691 Practice for Conducting an Interlaboratory Study to
2 sieve.
Determine the Precision of a Test Method
6.3 Transfer the presieved sample to a widemouth container
3. Summary of Test Method tared to the nearest 0.01 g.
6.4 Dry the presieved sample in air for3hat 400°C. It may
3.1 Asampleofcatalystorcatalystcarrierisrotatedforaset
be necessary to modify or eliminate this step when testing
period of time in a cylindrical drum having a single baffle.
materials that might be decomposed or drastically altered by
“Fines” produced by attrition and abrasion in the test are
the drying conditions.
determined by sieving through a standard sieve.
NOTE 1—For example, an activated carbon catalyst may be treated for
4. Significance and Use
4 h at 190°C in a vacuum oven.
4.1 This test method is considered to be a measure of the
6.5 Cool the dried sample for at least 30 min in a desiccator
propensity of a catalyst to produce fines in the course of
using freshly regenerated 4Amolecular sieves as the desiccant.
transportation, handling, and use. However, there is no abso-
The molecular sieves shall be regenerated at 220 to 260°C.
lute level of acceptability. The values obtained are significant
NOTE 2—Multiple samples can be handled simultaneously in 6.4 and
6.5. However, they should remain in a desiccator before analyzing.
This test method is under the jurisdiction of ASTM Committee D32 on
7. Procedure
Catalysts and is the direct responsibility of Subcommittee D32.02 on Physical–Me-
chanical Properties.
7.1 Clean the test cylinder and lid of the apparatus u
...