ASTM D5757-11

Standard Test Method for Determination of Attrition and Abrasion of Powdered Catalysts by Air Jets

SIGNIFICANCE AND USE
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.
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 powdered catalysts by means of air jet attrition. It is applicable to spherically or irregularly shaped particles which range in size between 10 and 180 m, 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 m are considered fines.
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

• Status: Historical
• Publication Date: 14-Nov-2011
• ICS: 71.040.30 - Chemical reagents
• Technical Committee: D32 - Catalysts
• Drafting Committee: D32.02 - Physical-Mechanical Properties

Relations

• Replaces: ASTM D5757-00(2006) - Standard Test Method for Determination of Attrition and Abrasion of Powdered Catalysts by Air Jets
• Effective Date: 15-Nov-2011

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D5757 − 11
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 4. Summary of Test Method
1.1 This test method covers the determination of the relative 4.1 A sample of dried powder is humidified and attrited by
attrition characteristics of FCC catalysts by means of air jet means of three high velocity jets of humidified air. The fines
attrition. Other fine powder catalysts can be analyzed by this are continuously removed from the attrition zone by elutriation
test method but the precision of this test method has been into a fines collection assembly.
determined only for FCC catalysts. It is applicable to spheri-
4.2 The AJI is calculated from the elutriated fines to give a
cally or irregularly shaped particles which range in size
relative estimate of the attrition resistance of the powdered
between 10 and 180 µm, have skeletal densities between 2.4
catalyst as may be observed in commercial use.
3 3
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
5. Significance and Use
considered fines.
5.1 This test method is intended to provide information
1.2 The values stated in SI units are to be regarded as
concerning the ability of a powdered catalyst to resist particle
standard. No other units of measurement are included in this
size reduction during use in a fluidized environment.
standard.
5.2 This test method is suitable for specification acceptance,
1.3 This standard does not purport to address all of the
manufacturing control, and research and development pur-
safety concerns, if any, associated with its use. It is the
poses.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Apparatus
bility of regulatory limitations prior to use.
6.1 The air jet attrition system consists of the following:
2. Referenced Documents
6.1.1 Attrition Tube,astainlesssteeltube710-mmlongwith
2
a 35-mm inside diameter.
2.1 ASTM Standards:
1
E177 Practice for Use of the Terms Precision and Bias in
NOTE 1—NPS 1 ⁄4-in. pipe, Schedule 40 has the appropriate inside
ASTM Test Methods diameter.
E456 Terminology Relating to Quality and Statistics
6.1.2 Three 2-mm Long Drilled Sapphire Square Edged
E691 Practice for Conducting an Interlaboratory Study to
Nozzles, precision drilled 0.381 6 0.005 mm in diameter.They
Determine the Precision of a Test Method
are mounted equidistant from each other, 10 mm from center
IEEE/ASTM SI-10 Standard for Use of the International
and flush with the top surface in a circular orifice plate 6.4-mm
2
System of Units (SI): The Modern Metric System
thick. The plate is designed to be attached to the bottom of the
vertical attrition tube within an air delivery manifold.
3. Terminology
6.1.3 Settling Chamber, a 300-mm long cylinder with a
3.1 Definitions of Terms Specific to This Standard:
110-mm inside diameter and with conical ends reducing to
3.1.1 Air Jet Index (AJI)—a unitless value numerically
30-mm inside diameter. The upper cone is approximately
equal to the percent attrition loss at 5 h.
100-mm long and the lower cone is approximately 230-mm
long. The chamber is mounted to the top of the attrition tube.
1
This test method is under the jurisdiction of ASTM Committee D32 on 6.1.4 Fines Collection Assembly, made up of a 250-mL
Catalysts and is the direct responsibility of Subcommittee D32.02 on Physical-
filtering flask, an extraction thimble connected to the side arms
Mechanical Properties.
of the flask, and a 200 by 13-mm diameter metal tubing bent to
Current edition approved Nov. 15, 2011. Published December 2011. Originally
anangleof125°connectingthetopoftheflasktothetopofthe
approved in 1995. Last previous edition approved in 2006 as D5757–00(2006).
DOI: 10.1520/D5757-11.
settling chamber.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
NOTE 2—The flask may be eliminated and the thimble connected
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on directly to the tubing if the attrition is expected to be low enough to avoid
the ASTM website. clogging the thimble and creating a backpressure in the settling chamber.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5757
...

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:D5757–00 (Reapproved 2006) Designation:D5757–11
Standard Test Method for
Determination of Attrition and Abrasion of PowderedFCC
1
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
1.1This test method covers the determination of the relative attrition characteristics of powdered catalysts by means of air jet
attrition. 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/cm
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
have skeletal densities between 2.4 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 considered fines.
1.2
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 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:
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
2
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)—a unitless value numerically equal to the percent attrition loss at 5 h.
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 TheAJI 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.
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 Oct. 1, 2006. Published November 2006. Originally approved in 1995. Last previous edition approved in 2000 as D5757–00. DOI:
10.1520/D5757-00R06.
Current edition approved Nov. 15, 2011. Published December 2011. Originally approved in 1995. Last previous edition approved in 2006 as D5757–00(2006). DOI:
10.1520/D5757-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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

---------------------- Page: 1 ----------------------
D5757–11
6. Apparatus
6.1 The air jet attrition system consists of the following:
6.1.1 Attrition Tube, a stainless steel tube 710-mm long with a 35-mm inside diameter.
1
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 Nozzles, precision drilled 0.381 6 0.005 mm in diameter. They are
mounted equidistant from each other, 10 mm from center and flush with the top surface in a circular orifice plate 6.4-mm thick.
The plate is designed to be attached to the bottom of
...