Standard Test Method for
Attrition and Abrasion of Catalysts and Catalyst Carriers1

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

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.

2. Referenced Documents

2.1 ASTM Standards:
E 177 Practice for Use of the Terms Precision and Bias in
ASTM Test Methods2
E 456 Terminology Relating to Quality and Statistics2
E 691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method2

3. Summary of Test Method

3.1 A sample of catalyst or catalyst carrier is rotated for a set
period of time in a cylindrical drum having a single baffle.
“Fines” produced by attrition and abrasion in the test are
determined by sieving through a standard sieve.

4. Significance and Use

4.1 This test method is considered to be a measure of the
propensity of a catalyst to produce fines in the course of
transportation, handling, and use. However, there is no absolute level of acceptability. The values obtained are significant
principally in relation to values for other materials (or other

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