ASTM D6761-07(2012)
(Test Method)Standard Test Method for Determination of the Total Pore Volume of Catalysts and Catalyst Carriers
Standard Test Method for Determination of the Total Pore Volume of Catalysts and Catalyst Carriers
SIGNIFICANCE AND USE
This test method provides for the measurement of volume of pores that are in the range of catalytic importance and possibly for adsorption processes. This test method requires the use of mercury in order to perform the measurements.
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 Å).
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 WARNINGMercury 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 websitehttp://www.epa.gov/mercury/faq.htmfor additional information. Users should be aware that selling mercury and/or mercury containing products 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 and health practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 8. Warning statements are given in 9.1.4, 9.1.7, and 9.1.11.
General Information
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D6761 − 07 (Reapproved 2012)
Standard Test Method for
Determination of the Total Pore Volume of Catalysts and
1
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 E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to
1.1 This test method covers the determination of the total
Determine the Precision of a Test Method
pore volume of catalysts and catalyst carriers, that is, the
volume of pores having pore diameter between approximately
3. Terminology
14 µm and 0.4 nm (4 Å).
3.1 Definitions:
1.2 The values stated in SI units are to be regarded as
3.1.1 particle volume—the volume of a particle including
standard. No other units of measurement are included in this
pores into which mercury cannot penetrate at ambient pressure
standard.
(smaller than approximately 14 µm diameter pore mouth).
1.3 WARNING—Mercury has been designated by many
3.1.2 true volume—the volume of a particle, including
regulatory agencies as a hazardous material that can cause
pores, into which helium cannot penetrate (smaller than about
central nervous system, kidney and liver damage. Mercury, or
approximately 0.4 nm (4 Å) diameter pore mouth).
its vapor, may be hazardous to health and corrosive to
3.1.3 Other definitions and terms used in this test method
materials. Caution should be taken when handling mercury and
are defined in Terminology D3766.
mercury containing products. See the applicable product Ma-
3.2 Symbols for Mercury Intrusion:
terial Safety Data Sheet (MSDS) for details and EPA’s
website—http://www.epa.gov/mercury/faq.htm—for addi-
tional information. Users should be aware that selling mercury
W = mass of sample
and/or mercury containing products into your state or country
W = mass of sealed empty sample cell
c
may be prohibited by law.
W' = mass of sealed sample cell filled with mercury
C
1.4 This standard does not purport to address all of the W = mass of sealed sample cell with sample
s
safety concerns, if any, associated with its use. It is the W' = mass of sealed sample cell with sample filled with
S
responsibility of the user of this standard to establish appro- mercury
C
V = volume of mercury in empty sample cell (volume of
priate safety and health practices and determine the applica-
Hg
sample cell)
bility of regulatory limitations prior to use. Specific hazard
S
V = volume of mercury in cell with sample
statements are given in Section 8. Warning statements are
Hg
3
Hg
V = sample volume, cm
S
given in 9.1.4, 9.1.7, and 9.1.11.
V = specific sample volume
Hg
V = particle volume
2. Referenced Documents
P
W = weight mercury reservoir after filling burette with
2
b
2.1 ASTM Standards:
sample
D3766 Terminology Relating to Catalysts and Catalysis
W = mass of mercury reservoir after filling burette with-
b'
E177 Practice for Use of the Terms Precision and Bias in
out sample
ASTM Test Methods
3.3 Symbols for Helium Pycnometry:
1
This test method is under the jurisdiction of ASTM Committee D32 on
3
Catalysts and is the direct responsibility of Subcommittee D32.02 on Physical-
V = volume of sample cell and associated tubing, cm
C
Mechanical Properties. 3
V = reference volume, cm
R
CurrenteditionapprovedMay1,2012.PublishedJuly2012.Originallyapproved
3
He
V = sample volume, cm
S
in 2002. Last previous edition approved in 2007 as D6761–07. DOI: 10.1520/
3
V = volume of calibration cylinder, cm
D6761-07R12.
Cyl
3
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
V = volume of calibration standard, cm
STD
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
V = specific sample volume
He
Standards volume information, refer to the standard’s Document Summary page on
P' = pressure in empty sample cell, psig or pascals
1
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6761 − 07 (2012)
P' = pressure in empty sample cell, after the reference
2
volume has been included in the system, psig or
pascals
P = pressure in sample cell with sample or calibration
1
standard before the reference volume has been
included in the system, psig or pascals
P = pressure with sample or calibration standard in the
2
sample cell, after the reference volume has been
included in the system, psig or pascals
W = tare weight of sample cup, g
1
W = mass of sample + tare weight of sample cup, g
2
W = mass of sample, g
3
P.V. = pore
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.