ASTM D4438-13
(Test Method)Standard Test Method for Particle Size Distribution of Catalysts and Catalyst Carriers by Electronic Counting
Standard Test Method for Particle Size Distribution of Catalysts and Catalyst Carriers by Electronic Counting
SIGNIFICANCE AND USE
4.1 This test method can be used to determine particle size distributions for material specifications, manufacturing control, and research and development work in the particle size range usually encountered in fluidizable cracking catalysts.
SCOPE
1.1 This test method covers the determination of particle size distribution of catalyst and catalyst carrier particles using an electroconductive sensing method and is one of several valuable methods for the measurement of particle size.
1.2 The range of particle sizes investigated was 20 to 150 μm (see IEEE/ASTM SI 10) equivalent spherical diameter. The technique is capable of measuring particles above and below this range. The instrument used for this method is an electric current path of small dimensions that is modulated by individual particle passage through an aperture, and produces individual pulses of amplitude proportional to the particle volume.
1.3 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
Relations
Buy Standard
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D4438 − 13
Standard Test Method for
Particle Size Distribution of Catalysts and Catalyst Carriers
1
by Electronic Counting
This standard is issued under the fixed designation D4438; 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 position on the instrument sample stand. The suspension is
forced through a restricting aperture. Each passing particle is
1.1 This test method covers the determination of particle
recordedonanelectroniccounter,andthedataareaccumulated
size distribution of catalyst and catalyst carrier particles using
according to selected particle size intervals for subsequent
an electroconductive sensing method and is one of several
processing.
valuable methods for the measurement of particle size.
3.2 The instrument response is proportional to liquid dis-
1.2 The range of particle sizes investigated was 20 to 150
placement by the particle volume. Equivalent spherical diam-
µm(seeIEEE/ASTM SI 10)equivalentsphericaldiameter.The
eter is commonly used to express the particle size.
technique is capable of measuring particles above and below
this range. The instrument used for this method is an electric
4. Significance and Use
current path of small dimensions that is modulated by indi-
4.1 This test method can be used to determine particle size
vidual particle passage through an aperture, and produces
individual pulses of amplitude proportional to the particle distributionsformaterialspecifications,manufacturingcontrol,
and research and development work in the particle size range
volume.
usually encountered in fluidizable cracking catalysts.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3
5. Apparatus
responsibility of the user of this standard to establish appro-
5.1 Electronic Particle Counter, with sample stand and
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. stirring motor.
5.2 Aperture Tubes, with varying diameters. The diameter
2. Referenced Documents
required is dependent upon the particle size distribution of the
2
2.1 ASTM Standards:
sample. Generally, any given tube will cover a particle size
D1193 Specification for Reagent Water
range from 2 to 40 % of its aperture diameter.
E177 Practice for Use of the Terms Precision and Bias in
5.3 Ultrasonic Tank, 100 W.
ASTM Test Methods
5.4 Beaker, 100-mL.
E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
5.5 Graduated Glass Pipet, 5-mL.
IEEE/ASTM SI 10 Standard for Use of the International
5.6 Wash Bottles.
System of Units (SI): The Modern Metric System
5.7 Membrane Filtering Device with 0.22-µm filters.
3. Summary of Test Method
5.8 Round-Bottom Sample Beakers, 250-mL.
3.1 Acarefully dispersed, dilute suspension of the sample in
5.9 Micro-Riffler or Chute Riffler.
a beaker filled with an electrolyte is placed in the counting
6. Reagents
1
This test method is under the jurisdiction of ASTM Committee D32 on
6.1 Purity of Reagents—Reagent grade chemicals shall be
Catalysts and is the direct responsibility of Subcommittee D32.02 on Physical-
used in all tests. Unless otherwise indicated, it is intended that
Mechanical Properties.
all reagents shall conform to the specifications of the Commit-
Current edition approved Dec. 1, 2013. Published December 2013. Originally
approved in 1985. Last previous edition approved in 2007 as D4438 – 85 (2007). tee onAnalytical Reagents of theAmerican Chemical Society,
DOI: 10.1520/D4438-13.
2
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
3
Standards volume information, refer to the standard’s Document Summary page on Supporting data have been filed at ASTM International Headquarters and may
the ASTM website. be obtained by requesting Research Report RR:D32-1011.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4438 − 13
4
where such specifications are available. Other grades may be 7.4.3 During stirring, using a 5-mL pipet, transfer 2 mL of
used, provided it is first ascertained that the reagent is of the sample suspension (from 7.4.2) to another 250-mL round-
sufficiently high purity to permit its use without lessening the
bottom beaker containing 200 mLof clean electrolyte. Be sure
accuracy of the determination. all the contents in the pipet are transferred.
7.4.4 Remove the beaker (from 7.4.1
...
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: D4438 − 85 (Reapproved 2007) D4438 − 13
Standard Test Method for
Particle Size Distribution of Catalytic Material Catalysts and
1
Catalyst Carriers by Electronic Counting
This standard is issued under the fixed designation D4438; 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 particle size distribution of catalyst and catalyst carrier particles using an
electroconductive sensing method and is one of several valuable methods for the measurement of particle size.
1.2 The range of particle sizes investigated was 20 to 150 μm (see IEEE/ASTM SI 10) equivalent spherical diameter. The
technique is capable of measuring particles above and below this range. The instrument used for this method is an electric current
path of small dimensions that is modulated by individual particle passage through an aperture, and produces individual pulses of
amplitude proportional to the particle volume.
1.3 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
2.1 ASTM Standards:
D1193 Specification for Reagent Water
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
IEEE/ASTM SI 10 Standard for Use of the International System of Units (SI): The Modern Metric System
3. Summary of Test Method
3.1 A carefully dispersed, dilute suspension of the sample in a beaker filled with an electrolyte is placed in the counting position
on the instrument sample stand. The suspension is forced through a restricting aperture. Each passing particle is recorded on an
electronic counter, and the data are accumulated according to selected particle size intervals for subsequent processing.
3.2 The instrument response is proportional to liquid displacement by the particle volume. Equivalent spherical diameter is
commonly used to express the particle size.
4. Significance and Use
4.1 This test method can be used to determine particle size distributions for material specifications, manufacturing control, and
research and development work in the particle size range usually encountered in fluidizable cracking catalysts.
3
5. Apparatus
5.1 Electronic Particle Counter, with sample stand and stirring motor.
5.2 Aperture Tubes, with varying diameters. The diameter required is dependent upon the particle size distribution of the sample.
Generally, any given tube will cover a particle size range from 2 to 40 % of its aperture diameter.
5.3 Ultrasonic Tank, 100 W.
1
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, 2007Dec. 1, 2013. Published April 2007December 2013. Originally approved in 1985. Last previous edition approved in 20012007 as
ε1
D4438–85(2001)D4438 – 85 (2007). . DOI: 10.1520/D4438-85R07.10.1520/D4438-13.
2
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:D32-1011.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4438 − 13
5.4 Beaker, 100-mL.
5.5 Graduated Glass Pipet, 5-mL.
5.6 Wash Bottles.
5.7 Membrane Filtering Device with 0.22-μm filters.
5.8 Round-Bottom Sample Beakers, 250-mL.
5.9 Micro-Riffler or Chute Riffler.
6. Reagents
6.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all
reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where
4
such specifications are available. Other grades may be used, provided it
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.