ASTM D6761-22a

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Designation: D6761 − 22 D6761 − 22a
Standard Test Method for
Determination of the Total Pore Volume of Catalysts and
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Catalyst Carriers
This standard is issued under the fixed designation D6761; 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
1.1 This test method covers the determination of the total pore volume of catalysts and catalyst carriers, that is, the volume of pores
having pore diameter between approximately 14 μm and 0.4 nm (4 ).
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
standard.
1.3 Warning—Mercury has been designated by many regulatory agencies as a hazardous material that can cause central nervous
system, kidney, and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should
be taken when handling mercury and mercury containing products. See the applicable product Material Safety Data Sheet (MSDS)
for details and EPA’s website—http://www.epa.gov/mercury/faq.htm—for additional information. Users should be aware that
selling mercury or mercury containing products, or both, into your state or country may be prohibited by law.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. Specific hazard statements are given in Section 8. Warning statements are given in 10.1.4,
10.1.7, and 10.1.11.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
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2.1 ASTM Standards:
D3766 Terminology Relating to Catalysts and Catalysis
E105 Guide for Probability Sampling of Materials
E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or
Process
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
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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, 2022Aug. 1, 2022. Published April 2022August 2022. Originally approved in 2002. Last previous edition approved in 20172022 as
D6761 – 17.D6761 – 22. DOI: 10.1520/D6761-22.10.1520/D6761-22A.
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volume information, refer to the standard’s Document Summary page on the ASTM website.
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D6761 − 22a
3. Terminology
3.1 Definitions:
3.1.1 particle volume—volume, n—the volume of a particle including pores into which mercury cannot penetrate at ambient
pressure (smaller than approximately 14 μm diameter pore mouth).
3.1.2 true volume—volume, n—the volume of a particle, including pores, into which helium cannot penetrate (smaller than about
approximately 0.4 nm (4 ) diameter pore mouth).
3.1.3 Other definitions and terms used in this test method are defined in Terminology D3766.
3.2 Symbols for Mercury Intrusion:
W = mass of sample
W = mass of sealed empty sample cell
c
W' = mass of sealed sample cell filled with mercury
C
W = mass of sealed sample cell with sample
s
W' = mass of sealed sample cell with sample filled with mercury
S
C
V = volume of mercury in empty sample cell (volume of sample cell)
Hg
S
V = volume of mercury in cell with sample
Hg
3
Hg
V = sample volume, cm
S
V = specific sample volume
Hg
V = particle volume
P
W = weight mercury reservoir after filling burette with sample
b
W = mass of mercury reservoir after fill
...