ASTM D5757-22

Standard Test Method for Determination of Attrition of FCC Catalysts by Air Jets

SIGNIFICANCE AND USE
5.1 This test method is intended to provide information concerning the ability of a powdered catalyst to resist particle size reduction during use in a fluidized environment.  
5.2 This test method is suitable for specification acceptance, manufacturing control, and research and development purposes.
SCOPE
1.1 This test method covers the determination of the relative attrition characteristics of FCC catalysts by means of air jet attrition. Other fine powder catalysts can be analyzed by this test method, but the precision of this test method has been determined only for FCC catalysts. It is applicable to spherically or irregularly shaped particles which range in size between 10 and 180 μm, have skeletal densities between 2.4 and 3.0 g/cm3 (2400 and 3000 kg/m3) (see IEEE/ASTM SI-10) and are insoluble in water. Particles less than 20 μm are considered fines. (See Terminology D3766.)  
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 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.  
1.4 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.

General Information

• Status: Published
• Publication Date: 30-Sep-2022
• ICS: 71.040.30 - Chemical reagents
• Technical Committee: D32 - Catalysts
• Drafting Committee: D32.02 - Physical-Mechanical Properties

Standards Content (Sample)

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.
Designation: D5757 − 22
Standard Test Method for
1
Determination of Attrition of FCC Catalysts by Air Jets
This standard is issued under the fixed designation D5757; 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 E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1.1 This test method covers the determination of the relative
IEEE/ASTM SI-10 Standard for Use of the International
attrition characteristics of FCC catalysts by means of air jet
System of Units (SI): The Modern Metric System
attrition. Other fine powder catalysts can be analyzed by this
test method, but the precision of this test method has been
3. Terminology
determined only for FCC catalysts. It is applicable to spheri-
3.1 Definitions of Terms Specific to This Standard:
cally or irregularly shaped particles which range in size
between 10 and 180 µm, have skeletal densities between 2.4 3.1.1 Air Jet Index (AJI), n—a unitless value numerically
3 3
equal to the percent attrition loss at 5 h.
and 3.0 g⁄cm (2400 and 3000 kg⁄m ) (see IEEE/ASTM SI-
10) and are insoluble in water. Particles less than 20 µm are
4. Summary of Test Method
considered fines. (See Terminology D3766.)
4.1 A sample of dried powder is humidified and attrited by
1.2 Units—The values stated in SI units are to be regarded
means of three high velocity jets of humidified air. The fines
as standard. No other units of measurement are included in this
are continuously removed from the attrition zone by elutriation
standard.
into a fines collection assembly.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 4.2 The AJI is calculated from the elutriated fines to give a
relative estimate of the attrition resistance of the powdered
responsibility of the user of this standard to establish appro-
catalyst as may be observed in commercial use.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
5. Significance and Use
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
5.1 This test method is intended to provide information
ization established in the Decision on Principles for the
concerning the ability of a powdered catalyst to resist particle
Development of International Standards, Guides and Recom-
size reduction during use in a fluidized environment.
mendations issued by the World Trade Organization Technical
5.2 This test method is suitable for specification acceptance,
Barriers to Trade (TBT) Committee.
manufacturing control, and research and development pur-
poses.
2. Referenced Documents
2
2.1 ASTM Standards:
6. Apparatus
D3766 Terminology Relating to Catalysts and Catalysis
6.1 The air jet attrition system consists of the following:
E105 Guide for Probability Sampling of Materials
6.1.1 Attrition Tube, a stainless steel tube 710 mm long with
E177 Practice for Use of the Terms Precision and Bias in
a 35 mm inside diameter.
ASTM Test Methods
1
E456 Terminology Relating to Quality and Statistics NOTE 1—NPS 1 ⁄4 in. pipe, Schedule 40 has the appropriate inside
diameter.
6.1.2 Three 2 mm Long Drilled Sapphire Square Edged
1
This test method is under the jurisdiction of ASTM Committee D32 on
Nozzles, precision drilled 0.381 6 0.005 mm in diameter.They
Catalysts and is the direct responsibility of Subcommittee D32.02 on Physical-
are mounted equidistant from each other, 10 mm from center
Mechanical Properties.
and flush with the top surface in a circular orifice plate 6.4 mm
Current edition approved Oct. 1, 2022. Published October 2022. Originally
thick. The plate is designed to be attached to the bottom of the
approved in 1995. Last previous edition approved in 2017 as D5757 – 11(2017).
DOI: 10.1520/D5757-22.
vertical attrition tube within an air delivery manifold.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1.3 Settling Chamber, a 300 mm long cylinder with a
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
110 mm inside diameter and with conical ends reducing to
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 30 mm inside diameter. The upper cone is approximately
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
...

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: D5757 − 11 (Reapproved 2017) D5757 − 22
Standard Test Method for
1
Determination of Attrition of FCC Catalysts by Air Jets
This standard is issued under the fixed designation D5757; 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 relative attrition characteristics of FCC catalysts by means of air jet attrition.
Other fine powder catalysts can be analyzed by this test method, but the precision of this test method has been determined only
for FCC catalysts. It is applicable to spherically or irregularly shaped particles which range in size between 10 and 180 μm,
3 3
180 μm, have skeletal densities between 2.4 and 3.0 3.0 g g/cm⁄cm (2400 and 3000 kg ⁄m ) (see IEEE/ASTM SI-10) and are
insoluble in water. Particles less than 20 μm are considered fines. (See Terminology D3766.)
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 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 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
2
2.1 ASTM Standards:
D3766 Terminology Relating to Catalysts and Catalysis
E105 Guide for Probability Sampling of Materials
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
IEEE/ASTM SI-10 Standard for Use of the International System of Units (SI): The Modern Metric System
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 Air Jet Index (AJI)—(AJI), n—a unitless value numerically equal to the percent attrition loss at 5 h.5 h.
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 Feb. 1, 2017Oct. 1, 2022. Published February 2017October 2022. Originally approved in 1995. Last previous edition approved in 20112017 as
D5757D5757 – 11–11.(2017). DOI: 10.1520/D5757-11R17.10.1520/D5757-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
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
1

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D5757 − 22
4. Summary of Test Method
4.1 A sample of dried powder is humidified and attrited by means of three high velocity jets of humidified air. The fines are
continuously removed from the attrition zone by elutriation into a fines collection assembly.
4.2 The AJI is calculated from the elutriated fines to give a relative estimate of the attrition resistance of the powdered catalyst
as may be observed in commercial use.
5. Significance and Use
5.1 This test method is intended to provide information concerning the ability of a powdered catalyst to resist particle size
reduction during use in a fluidized environment.
5.2 This test method is suitable for specification acceptance, manufacturing control, and research and development purposes.
6. Apparatus
6.1 The air jet attrition system consists of the following:
6.1.1 Attrition Tube, a stainless steel tube 710-mm710 mm long with a 35-mm35 mm inside diameter.
1
NOTE 1—NPS 1 ⁄4-in. in. pipe, Schedule 40 has the appropriate inside diameter.
6.1.2 Three 2-mm2 mm Long Drilled Sapphire Square Edged Nozzles, precision drilled 0.381 6 0.005 mm 0.005 mm in diameter.
They are mounted equidistant from each other, 10 mm from center and flush with the
...