ASTM D2638-21
(Test Method)Standard Test Method for Real Density of Calcined Petroleum Coke by Helium Pycnometer
Standard Test Method for Real Density of Calcined Petroleum Coke by Helium Pycnometer
SIGNIFICANCE AND USE
5.1 The real density of calcined petroleum coke directly influences the physical and chemical properties of the manufactured carbon and graphite artifacts for which it is used. Density, therefore, is a major quality specification of calcined petroleum coke and is used as a control in coke calcination.
SCOPE
1.1 This test method covers the determination of the real density (RD) of calcined petroleum coke. Real density, by definition is obtained when the particle size of the specimen is smaller than 75 µm (U.S. No. 200 Sieve).
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, 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
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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: D2638 − 21
Standard Test Method for
Real Density of Calcined Petroleum Coke by Helium
1
Pycnometer
This standard is issued under the fixed designation D2638; 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* 3. Terminology
1.1 This test method covers the determination of the real 3.1 Definitions:
density (RD) of calcined petroleum coke. Real density, by 3.1.1 calcined petroleum coke, n—petroleum coke that has
definition is obtained when the particle size of the specimen is been thermally treated to drive off the volatile matter and to
smaller than 75 µm (U.S. No. 200 Sieve). develop crystalline structure.
3.1.2 petroleum coke, n—a solid, carbonaceous residue
1.2 The values stated in SI units are to be regarded as
produced by thermal decomposition of heavy petroleum frac-
standard. No other units of measurement are included in this
tions or cracked stocks, or both.
standard.
1.3 This standard does not purport to address all of the 3.2 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the 3.2.1 dedusting material, n—See Test Method D4930.
responsibility of the user of this standard to establish appro-
3.2.2 real density, n—(RD) (also be referred to as true
priate safety, health, and environmental practices and deter-
specific gravity). The mass divided by the volume occupied by
mine the applicability of regulatory limitations prior to use.
thematerialexcludingporesandvoids.Itisrequired,therefore,
1.4 This international standard was developed in accor-
that voids in the coke be eliminated and that pores in the
dance with internationally recognized principles on standard-
materialbefilledbythefluidbeingdisplaced.Thisrequirement
ization established in the Decision on Principles for the
ismetforthepurposesofthistestmethodbyreducingthecoke
Development of International Standards, Guides and Recom-
particles to a size smaller than 75 µm.
mendations issued by the World Trade Organization Technical
3.2.2.1 Discussion—The density of particles larger than
Barriers to Trade (TBT) Committee.
75 µm up to the largest that can be put into the helium
pycnometer can also be determined, but must be designated as
2. Referenced Documents
particle density (PD). The precision data obtained for RD may
2
2.1 ASTM Standards:
not be applicable to PD.
D4930 Test Method for Dust Control Material on Calcined
Petroleum Coke 4. Summary of Test Method
D6969 Practice for Preparation of Calcined Petroleum Coke
4.1 A representative sample of calcined petroleum coke is
Samples for Analysis
dried and ground to pass a 75 µm (200-mesh) screen.The mass
D6970 Practice for Collection of Calcined Petroleum Coke
of the sample is determined directly and the volume derived by
Samples for Analysis
the volume of helium displaced when the sample is introduced
E11 Specification for Woven Wire Test Sieve Cloth and Test
into a helium pycnometer. The ratio of the mass of the sample
Sieves
to the volume is reported as the real density.
E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
5. Significance and Use
5.1 The real density of calcined petroleum coke directly
1 influences the physical and chemical properties of the manu-
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of factured carbon and graphite artifacts for which it is used.
SubcommitteeD02.05onPropertiesofFuels,PetroleumCokeandCarbonMaterial.
Density, therefore, is a major quality specification of calcined
Current edition approved Jan. 1, 2021. Published January 2021. Originally
petroleum coke and is used as a control in coke calcination.
ɛ1
approved in 1991. Last previous edition approved in 2015 as D2638 – 10 (2015) .
DOI: 10.1520/D2638-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Interferences
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 Oil or other dedust material sprayed on calcined petro-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. leum coke to control dust will interfere with the determination
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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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.
´1
Designation: D2638 − 10 (Reapproved 2015) D2638 − 21
Standard Test Method for
Real Density of Calcined Petroleum Coke by Helium
1
Pycnometer
This standard is issued under the fixed designation D2638; 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
ε NOTE—Editorial changes were made throughout in December 2015.
1. Scope Scope*
1.1 This test method covers the determination of the real density (RD) of calcined petroleum coke. Real density, by definition is
obtained when the particle size of the specimen is smaller than 75 μm (U.S. No. 200 Sieve).
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 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:
D346D4930 Practice for Collection and Preparation of Coke Samples for Laboratory AnalysisTest Method for Dust Control
Material on Calcined Petroleum Coke
D2013D6969 Practice for Preparing Coal Preparation of Calcined Petroleum Coke Samples for Analysis
D2234/D2234MD6970 Practice for Collection of a Gross Sample of CoalCalcined Petroleum Coke Samples for Analysis
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4292 Test Method for Determination of Vibrated Bulk Density of Calcined Petroleum Coke
D4930 Test Method for Dust Control Material on Calcined Petroleum Coke
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions:
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.
Current edition approved Oct. 1, 2015Jan. 1, 2021. Published December 2015January 2021. Originally approved in 1991. Last previous edition approved in 20102015 as
ɛ1
D2638 – 10.D2638 – 10 (2015) . DOI: 10.1520/D2638-10R15E01. 10.1520/D2638-21.
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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D2638 − 21
3.1.1 calcined petroleum coke, n—petroleum coke that has been thermally treated to drive off the volatile matter and to develop
crystalline structure.
3.1.2 petroleum coke, n—a solid, carbonaceous residue produced by thermal decomposition of heavy petroleum fractions or
cracked stocks, or both.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 bulk density, n—the mass of the particles divided by the volume they occupy which includes the space between the particles.
Refer to Test Method D4292 for bulk density procedures.
3.2.1 dedusting material, n—See Test Method D4930.
3.2.2 real density, n—(RD) (also be referred to as true specific gravity). The mass divided by the volume occupied by the material
excluding pores and voids. It is required, therefore, that voids in the coke be eliminated and that pores in the material be filled by
the fluid being displaced. This requirement is met for the purposes of this test method by reducing the coke particles to a size
smaller than 75 μm.
3.2.2.1 Discussion—
The density of particles larger than 75 μm up to the largest that can be put into the helium pycnometer can also be determined,
but must be designated as par
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