Standard Test Method for
Mechanically Tapped Packing Density of Formed Catalyst
and Catalyst Carriers1
This standard is issued under the fixed designation D 4164; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the 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.
1.1 This test method covers the determination of the mechanically tapped density of formed catalyst and catalyst
carriers. For the purpose of this test method, catalyst particles
are defined as extrudates, spheres, or formed pellets of 0.8 to
4.8-mm (1⁄32 to 3⁄16-in.) nominal diameter.
1.2 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: 2
D 3766 Terminology Relating to Catalysts and Catalysis
E 177 Practice for Use of the Terms Precision and Bias in
ASTM Test Methods
E 456 Terminology Relating to Quality and Statistics
E 691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
3.1 Definitions—See Terminology D 3766.
4. Summary of Test Method
4.1 A preconditioned sample of formed catalyst or catalyst
carrier is tapped in a graduated cylinder. The mechanically
tapped packing density is determined from the known mass and
5. Significance and Use
5.1 This test method is to be used for measuring the
mechanically tapped packing density of formed particles that
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