ASTM D4781-03(2008)
(Test Method)Standard Test Method for Mechanically Tapped Packing Density of Fine Catalyst Particles and Catalyst Carrier Particles
Standard Test Method for Mechanically Tapped Packing Density of Fine Catalyst Particles and Catalyst Carrier Particles
SIGNIFICANCE AND USE
This test method is for measuring the mechanically tapped packing density of powders that are smaller than 0.8 mm in diameter, such as Fluidized Catalytic Cracking Catalysts (FCC).
SCOPE
1.1 This test method covers the determination of the mechanically tapped packing density of fine catalyst and catalyst carrier particles smaller than 0.8 mm in 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.
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Designation: D4781 − 03(Reapproved 2008)
Standard Test Method for
Mechanically Tapped Packing Density of Fine Catalyst
Particles and Catalyst Carrier Particles
This standard is issued under the fixed designation D4781; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 6. Apparatus
1.1 This test method covers the determination of the me-
6.1 Graduated Cylinder, capacity 100 mL.
chanically tapped packing density of fine catalyst and catalyst
6.2 Holder—A cylinder holder weighing 454 g (1 lb).
carrier particles smaller than 0.8 mm in diameter.
6.3 Tapping Device, consisting of a baseplate with worm
1.2 This standard does not purport to address all of the
drive, with specifications of 250 r/min camshaft speed, tapping
safety concerns, if any associated with its use. It is the
stroke travel of 3.2 mm ( ⁄8 in.).
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6.4 Counter—A four-digit adjustable counter, which can be
bility of regulatory limitations prior to use.
preset to deliver number of taps between 1 and 9999.
6.5 Desiccator, with a desiccant grade molecular sieve such
2. Referenced Documents
2 as 4A.
2.1 ASTM Standards:
D3766 Terminology Relating to Catalysts and Catalysis 6.6 Balance having a sensitivity of 0.1 g.
E177 Practice for Use of the Terms Precision and Bias in
6.7 Drying Oven.
ASTM Test Methods
E456 Terminology Relating to Quality and Statistics
7. Procedure
E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method 7.1 Heatanadequatesampleat400 615°Cfornotlessthan
3 h. Normally, this treatment can take place in air. However, in
3. Terminology
the case of materials that might react with air at elevated
temperature (such as prereduced catalysts) the heat treatment
3.1 Definitions—See Terminology D3766.
should take place in an inert atmosphere. After heating, cool
4. Summary of Test Method
the test sample in a desiccator or other suitable container to
eliminate the possibility of moisture adsorption prior to testing.
4.1 A preconditioned sample of dried fine catalyst or cata-
lyst carrier particles is tapped in a graduated cylinder. The
NOTE 1—These conditions may not be appropriate for all materials.
mechanically tapped packing density is determined from the
NOTE 2—Since many catalyst formulations are strong adsorbents, the
known mass and tapped volume.
use of 4A indicating (cobalt-treated) molecular sieves as a desiccating
medium is recommended. The desiccant should be regenerated at 220 to
5. Significance and Use
260°C, as required.
NOTE 3—Multiple samples can be pretreated but must be desiccated
5.1 This test method is for measuring the mechanically
prior to analysis.
tapped packing density of powders that are smaller than 0.8
mmindiameter,suchasFluidizedCatalyticCrackingCatalysts 7.2 Carefully pour between 90 and 100 mL of the test
(FCC). specimen into the tared-graduated cylinder using a funnel. To
ensure proper level, rotate the funnel while pouring the test
specimen. Weigh immediately to the nearest tenth of a gram.
This test method is under the jurisdiction of ASTM Committee D32 on
Catalysts and is the direct responsibility of Subcommittee D32.02 on Physical- The entire transfer time should be between 35 and 50 s.
Mechanical Properties.
7.3 Preset the counter to 1000 taps.
Current
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D4781–99 Designation: D 4781 – 03 (Reapproved 2008)
Standard Test Method for
Mechanically Tapped Packing Density of Fine Catalyst
Particles and Catalyst Carrier Particles
This standard is issued under the fixed designation D 4781; 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 mechanically tapped packing density of fine catalyst and catalyst carrier
particles smaller than 0.8 mm in 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:
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. Summary of Test Method
3.1Apreconditioned sample of dried fine catalyst or catalyst carrier particles is tapped in a graduated cylinder.The mechanically
tapped packing density is determined from the known weight and tapped volume. Terminology
3.1 Definitions—See Terminology D 3766.
4. Significance and Use
4.1This test method is for measuring the mechanically tapped packing density of powders that are smaller than 0.8 mm in
diameter, such as Fluidized Catalytic Cracking Catalysts (FCC). Summary of Test Method
4.1 A preconditioned sample of dried fine catalyst or catalyst carrier particles is tapped in a graduated cylinder. The
mechanically tapped packing density is determined from the known mass and tapped volume.
5. Significance and Use
5.1 This test method is for measuring the mechanically tapped packing density of powders that are smaller than 0.8 mm in
diameter, such as Fluidized Catalytic Cracking Catalysts (FCC).
6. Apparatus
5.1
6.1 Graduated Cylinder, capacity 100 mL.
5.26.2 Holder—A cylinder holder weighing 454 g (1 lb).
5.3
6.3 Tapping Device, consisting of a baseplate with worm drive, with specifications of 250 r/min camshaft speed, tapping stroke
travel of 3.2 mm ( ⁄8 in.).
5.4
This test method is under the jurisdiction of ASTM Committee D-32 on Catalysts and is the direct responsibility of Subcommittee D32.02 on Physical-Mechanical
Properties.
Current edition approved Oct. 10, 1999. Published December 1999. Originally published as D4781–88. Last previous edition D4781–94.
This test method is under the jurisdiction of ASTM Committee D32 on Catalysts and is the direct responsibility of Subcommittee D32.02 on Physical-Mechanical
Properties.
Current edition approved April 1, 2008. Published May 2008. Originally approved in 1988. Last previous edition approved in 2003 as D 4781–03.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 14.02.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 4781 – 03 (2008)
6.4 Counter—A four-digit adjustable counter, which can be preset to deliver number of taps between 1 and 9999.
5.5
6.5 Desiccator, with a desiccant grade molecular sieve such as 4A.
5.6
6.6 Balance having a sensitivity of 0.1 g.
5.7
6.7 Drying Oven.
6.
7. Procedure
6.1Heat7.1 Heat an adequate sample at 673 K (400°C ) 400 6 15 K15°C for not less than
...
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