ASTM D8413-21

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Designation: D8413 − 21
Standard Guide for
Measuring the Water Pore Volume of Catalytic Materials by
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Centrifuge
This standard is issued under the fixed designation D8413; 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.
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1. Scope 2.2 Other ASTM Documents:
STP 447A Manual on Test Sieving Methods
1.1 This guide describes how to measure the pore volume of
catalytic materials by water immersion with the excess water
3. Terminology
removed with a centrifuge. The measured pore volume is
3.1 Definitions—See Terminology D3766.
converted to the dry pore volume by using the loss on ignition
(LOI) of the material. It is generally applicable to both
3.2 Definitions of Terms Specific to This Standard:
powdered materials and particles greater than about 1 mm.
3.2.1 water pore volume, n—also known as the pore volume
determined by water absorption, is a measure of the porosity of
1.2 Units—The values stated in SI units are to be regarded
a catalytic material.
as standard. No other units of measurement are included in this
standard.
4. Summary of Guide
1.3 This standard does not purport to address all of the
4.1 This guide measures pore volume by water immersion
safety concerns, if any, associated with its use. It is the
withtheexcesswaterremovedwithacentrifuge.Themeasured
responsibility of the user of this standard to establish appro-
pore volume is converted to the dry pore volume by using the
priate safety, health, and environmental practices and deter-
LOI of the material.
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
5. Significance and Use
dance with internationally recognized principles on standard-
5.1 This guide provides an alternative way to measure the
ization established in the Decision on Principles for the
porosity of catalytic materials without the use of mercury
Development of International Standards, Guides and Recom-
porosimetry. It is useful for research and development as well
mendations issued by the World Trade Organization Technical
as quality control purposes. (See Test Methods D4284 and
Barriers to Trade (TBT) Committee.
D6761.)
2. Referenced Documents
6. Interferences
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2.1 ASTM Standards:
6.1 There are no known interferences. This method cannot
D3766 Terminology Relating to Catalysts and Catalysis
be used for materials that react with or dissolve in water.
D4284 Test Method for Determining Pore Volume Distribu-
tion of Catalysts and Catalyst Carriers by Mercury Intru- 7. Apparatus
sion Porosimetry
7.1 Balance, accurate to nearest 0.0001 g.
D6761 Test Method for Determination of the Total Pore
7.2 Centrifuge Tubes, custom made according to drawings
Volume of Catalysts and Catalyst Carriers
using the tube described in Fig. 1 for particles >~1 mm or the
E1272 Specification for Laboratory Glass Graduated Cylin-
tube described in Fig. 2 for powders. These tubes can be
ders
fabricated from any suitable material, including glasses such as
borosilicate glass or plastics such as nylon.
7.3 Centrifuge, capable of a force of at least 456 G and
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This guide is under the jurisdiction ofASTM Committee D32 on Catalysts and
equipped with timer, speed control and shields, such as a
is the direct responsibility of Subcommittee D32.02 on Physical-Mechanical
Properties.
Dynac 11 or equivalent. (See Note 1.)
Current edition approved Oct. 1, 2021. Published November 2021. DOI:
7.4 Beaker, 1000 ml.
10.1520/D8413-21.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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the ASTM website. Service at service@astm.org.
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D8413 − 21
NOTE 1—These tubes can be fabricated from any suitable material, including glasses such as borosilicate glass or plastics such as nylon.
FIG. 1 Sample Holder for >1 mm Particles
7.5 Graduated Cylinder, capacity 100 mL, conforming to 14.2 Divide 85 6 10 cc of sample between the two centri-
Specification E1272, Class A. fuge tubes. The final weight of the tubes should be within
6 0.2 g of each other.
7.6 Porcelain Crucible, 100 ml.
14.3 Weigh each of the filled tubes to the nearest 0.01 g and
7.7 Furnace, capable of 482 °C.
record this weight as (M2).
7.8 Timer.
14.4 Set the speed of the centrifuge at the approx
...