ASTM D4179-01

Standard Test Method for Single Pellet Crush Strength of Formed Catalyst Shapes

SCOPE
1.1 This test method covers determining the resistance of formed catalysts to compressive force and is applicable to regular catalyst shapes such as tablets and spheres. Extrudates, granular materials, and other irregular shapes are specifically excluded.  
1.2 This test method determines the average crush strength in the range from 0 to 50 lbf (0 to 220 N).  
1.3 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses for information only.  
1.4  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-Oct-2001
• ICS: 71.040.30 - Chemical reagents
• Technical Committee: D32 - Catalysts
• Drafting Committee: D32.02 - Physical-Mechanical Properties

Relations

• Replaced By: ASTM D4179-01(2006) - Standard Test Method for Single Pellet Crush Strength of Formed Catalyst Shapes
• Effective Date: 01-Apr-2006

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4179–01
Standard Test Method for
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Single Pellet Crush Strength of Formed Catalyst Shapes
This standard is issued under the fixed designation D4179; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Summary of Test Method
1.1 This test method covers determining the resistance of 4.1 Individualpelletstakenfromarepresentativesampleare
formed catalysts to compressive force and is applicable to placed between two flat surfaces, subjected to a compressive
regular catalyst shapes such as tablets and spheres. Extrudates, load,andtheforcerequiredtocrushthepelletismeasured.The
granular materials, and other irregular shapes are specifically procedure is replicated and the average of all measurements
excluded. taken is determined.
1.2 This test method determines the average crush strength
2 5. Significance and Use
in the range from 0 to 50 lbf (0 to 220 N).
5.1 This test method is intended to provide information
1.3 The values stated in inch-pound units are to be regarded
asthestandard.Thevaluesinparenthesesforinformationonly. concerning the ability of a catalyst shape to retain physical
integrity during use.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
6. Apparatus
responsibility of the user of this standard to establish appro-
6.1 A suitable compression testing device is required, con-
priate safety and health practices and determine the applica-
sisting of the following:
bility of regulatory limitations prior to use.
6.1.1 Calibrated Gage, marked for direct reading of the
2. Referenced Documents
force in pounds (newtons). Additionally, a suitable system
(mechanical,hydraulic,orpneumatic)mustbeprovidedsothat
2.1 ASTM Standards:
E177 Practice for Use of the Terms Precision and Bias in the rate of force application is both uniform and controllable
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within specified limits.
ASTM Methods
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E456 Terminology Relating to Quality and Statistics 6.1.2 Tool Steel Anvils, between which the sample will be
E691 Practice for Conducting an Interlaboratory Study to crushed. The faces of the tool steel anvils shall be smooth and
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free from recesses or ridges that would interfere with uniform
Determine the Precision of a Test Method
IEEE/ASTM SI 10 Standard for Use of the International contact along the major axis of the pellet. When testing tablets
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or spheres, the anvils may be of any convenient size or shape
System of Units (SI): The Modern Metric System
as long as their length and width are greater than the corre-
3. Terminology
sponding dimensions of the tablet or pellet being tested (see
3.1 Definitions of Terms Specific to This Standard: Fig. 1).
3.1.1 tablets—tabletted cylindrical catalyst particles, either
7. Sampling
solid or hollow core, with lengths that do not vary from the
mean by more than 610%. 7.1 A test sample of 50 to 200 individual pieces shall be
obtained from larger composites by riffling or splitting in
3.1.2 pellets—any catalyst shape—tablets, spheres, or other
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similar configuration—that is not otherwise excluded from the accordance with STP 447A, (paragraph 5.12) with the aim of
obtaining a representative sample that represents shape and
scope of this test.
sizedistributionofthelargercomposite.Thesizeofthesample
shall depend on the precision required and the homogeneity of
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This test method is under the jurisdiction of ASTM Committee D32 on
the material being tested.
Catalysts and is the direct responsibility of Subcommittee D32.02 on Physical
Mechanical Properties.
Current edition approved Oct. 10, 2001. Published December 2001. Originally
e1 4
published as D4179–82. Last previous edition D4179–88a (1994) . Available fromASTM International Headquarters, 100 Barr Harbor Drive, PO
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Annual Book of ASTM Standards, Vol 14.04. Box C700, West Conshohocken, PA 19428–2959, STP 447A, Manual on Test
3
Annual Book of ASTM Standards, Vol 14.02. Sieving Methods.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D4179
pellet followed by continued resistance to increasing load are
not to be used as criteria for determining the end-point of this
test.
9.4 Read and record, to the nearest one-half graduation, the
force indicated on the calibrated dial of the apparatus at the
instant of collapse.
9.5 Separate the anvils and remove all residue with a soft
cloth or brush. Ensure that the faces of the anvils are free from
adhering particles.
9.6 Repeat Steps 9.2 through 9.6 until all pellets in the
sample h
...