ASTM D4058-96

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
• Technical Committee: D32 - Catalysts
• Drafting Committee: D32.02 - Physical-Mechanical Properties

Relations

• Replaced By: ASTM D4058-96(2001) - Standard Test Method for Attrition and Abrasion of Catalysts and Catalyst Carriers
• Effective Date: 10-Sep-1996
• 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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 4058 – 96
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 samples of the same material) of comparable size.
1.1 This test method covers the determination of the attri-
5. Apparatus
tion and abrasion resistance of catalysts and catalyst carriers. It
5.1 A cylindrical drum with inside dimensions of 10 in. (254
is applicable to tablets, extrudate, spheres, and irregularly
1 mm) diameter and 6 in. (152 mm) long with a single radial
shaped particles larger than about ⁄16 in. (1.6 mm) and smaller
baffle 2 in. (51 mm) high extending the full length of the
than about ⁄4 in. (19 mm). The materials used in developing
cylinder. A lid shall be provided and secured to the container
the method exhibited losses on attrition less than 7 %; how-
with Allen-head screws, wing nuts or other suitable means as to
ever, the method should be applicable to materials giving much
assure that no fines escape during the test. The inside of the
higher attritions.
drum should have a surface roughness no greater than about
1.2 The values stated in inch-pound units are to be regarded
250 μin. (6.4 μm). (The roughness of cold-rolled steel or a
as the standard. The values given in parentheses are for
smooth grind on a lathe is satisfactory.) A suitable design is
information only.
shown in Fig. 1.
1.3 This standard does not purport to address all of the
5.2 Any convenient means of rotation, such as a ball mill
safety concerns, if any, associated with its use. It is the
roller, geared to give the desired rate of rotation of the drum.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Sampling
bility of regulatory limitations prior to use.
6.1 Obtain a representative sample of about 110 g of the
2. Referenced Documents material to be tested by gently “splitting” or quartering. Any
sampling technique requiring extensive agitation or handling
2.1 ASTM Standards:
will cause some attrition and, therefore, compromise the results
E 177 Practice for Use of the Terms Precision and Bias in
2 of the test.
ASTM Test Methods
6.2 Gently sieve the sample on a No. 20 (850-μm) ASTM
E 456 Terminology Relating to Quality and Statistics
sieve.
E 691 Practice for Conducting an Interlaboratory Study to
6.3 Transfer the presieved sample to a widemouth container
Determine the Precision of a Test Method
tared to the nearest 0.01 g.
3. Summary of Test Method 6.4 Dry the presieved sample in air for3hat 400°C. It may
be necessary to modify or eliminate this step when testing
3.1 A sample of catalyst or catalyst carrier is rotated for a set
materials that might be decomposed or drastically altered by
period of time in a cylindrical drum having a single baffle.
the drying conditions.
“Fines” produced by attrition and abrasion in the test are
determined by sieving through a standard sieve.
NOTE 1—For example, an activated carbon catalyst may be treated for
4 h at 190°C in a vacuum oven.
4. Significance and Use
6.5 Cool the dried sample for at least 30 min in a desiccator
4.1 This test method is considered to be a measure of the
using freshly regenerated 4A molecular sieves as the desiccant.
propensity of a catalyst to produce fines in the course of
The molecular sieves shall be regenerated at 220 to 260°C.
transportation, handling, and use. However, there is no abso-
NOTE 2—Multiple samples can be handled simultaneously in 6.4 and
lute level of acceptability. The values obtained are significant
6.5. However, they should remain in a desiccator before analyzing.
principally in relation to values for other materials (or other
7. Procedure
This test method is under the jurisdiction of ASTM Committee D-32 on 7.1 Clean the test cylinder and lid of the apparatus using a
Catalysts and is the direct responsibility of Subcommittee D32.02 on Physical–Me-
fine-bristle brush
...