ASTM D2638-10
(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
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 microns (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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D2638 − 10
StandardTest 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
3.1 Definitions:
1.1 This test method covers the determination of the real
density (RD) of calcined petroleum coke. Real density, by 3.1.1 calcined petroleum coke, n—petroleum coke that has
been thermally treated to drive off the volatile matter and to
definition is obtained when the particle size of the specimen is
smaller than 75 microns (No. 200 Sieve). develop crystalline structure.
3.1.2 petroleum coke—a solid, carbonaceous residue pro-
1.2 The values stated in SI units are to be regarded as
duced by thermal decomposition of heavy petroleum fractions
standard. No other units of measurement are included in this
or cracked stocks, or both.
standard.
3.2 Definitions of Terms Specific to This Standard:
1.3 This standard does not purport to address all of the
3.2.1 bulk density—the mass of the particles divided by the
safety concerns, if any, associated with its use. It is the
volume they occupy which includes the space between the
responsibility of the user of this standard to establish appro-
particles. Refer to Test Method D4292 for bulk density
priate safety and health practices and determine the applica-
procedures.
bility of regulatory limitations prior to use.
3.2.2 dedusting material—See Test Method D4930.
2. Referenced Documents
3.2.3 real density—(RD) (also be referred to as true specific
2
2.1 ASTM Standards: gravity). The mass divided by the volume occupied by the
D346 Practice for Collection and Preparation of Coke material excluding pores and voids. It is required, therefore,
Samples for Laboratory Analysis that voids in the coke be eliminated and that pores in the
D2013 Practice for Preparing Coal Samples for Analysis materialbefilledbythefluidbeingdisplaced.Thisrequirement
D2234/D2234M Practice for Collection of a Gross Sample ismetforthepurposesofthistestmethodbyreducingthecoke
particles to a size smaller than 75 microns.
of Coal
D4057 Practice for Manual Sampling of Petroleum and 3.2.3.1 Discussion—The density of particles larger than 75
microns up to the largest that can be put into the helium
Petroleum Products
D4292 Test Method for Determination of Vibrated Bulk pycnometer can also be determined, but must be designated as
particle density (PD). The precision data obtained for RD may
Density of Calcined Petroleum Coke
D4930 Test Method for Dust Control Material on Calcined not be applicable to PD.
Petroleum Coke
4. Summary of Test Method
E11 Specification for Woven Wire Test Sieve Cloth and Test
Sieves
4.1 A representative sample of calcined petroleum coke is
E691 Practice for Conducting an Interlaboratory Study to
dried and ground to pass a 75-micron (200-mesh) screen. The
Determine the Precision of a Test Method
mass of the sample is determined directly and the volume
derived by the volume of helium displaced when the sample is
introduced into a helium pycnometer. The ratio of the mass of
1 the sample to the volume is reported as the real density.
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.
5. Significance and Use
CurrenteditionapprovedMay1,2010.PublishedJuly2010.Originallyapproved
5.1 The real density of calcined petroleum coke directly
in 1991. Last previous edition approved in 2006 as D2638–06. DOI: 10.1520/
D2638-10.
influences the physical and chemical properties of the manu-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
factured carbon and graphite artifacts for which it is used.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Density, therefore, is a major quality specification of calcined
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. petroleum coke and is used as a control in coke calcination.
*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 − 10
6. Interferences 10.3 Connect, either manually or automatically, the control
chamber, containing helium at a higher pressure than the
6.1 Oil or other dedust material sprayed on calcined petro-
sample chamber, with the sample cha
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:D2638–06 Designation:D2638–10
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*
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 microns (No. 200 Sieve).
1.2The values stated in acceptable metric units are to be regarded as the standard.
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:
D346 Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
D2013 Practice for Preparing Coal Samples for Analysis
D2234/D2234M Practice for Collection of a Gross Sample of Coal
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 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:
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—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—themassoftheparticlesdividedbythevolumetheyoccupywhichincludesthespacebetweentheparticles.
Refer to Test Method D4292 for bulk density procedures.
3.2.2 dedusting material—See Test Method D4930.
3.2.3 real density(RD)—(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 microns.
3.2.3.1 Discussion—The density of particles larger than 75 microns up to the largest that can be put into the helium pycnometer
can also be determined, but must be designated as particle density (PD).The precision data obtained for RD may not be applicable
to PD.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.05 on
Properties of Fuels, Petroleum Coke and Carbon Material.
Current edition approved JulyMay 1, 2006.2010. Published July 2006.2010. Originally approved in 1991. Last previous edition approved in 20022006 as
D2638–91(2002).D2638–06. DOI: 10.1520/D2638-106.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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
---------------------- Page: 1 ----------------------
D2638–10
4. Summary of Test Method
4.1 Arepresentative sample of calcined petroleum coke is dried and ground to pass a 75-micron (200-mesh) screen. The mass
of the sample is determined directly and the volume derived by the volume of helium displaced when the sample is introduced
into a helium pycnometer. The ratio of the mass of the sample to the volume is reported as the real density.
5. Significance and Use
5.1 The real density of calcined petroleum coke dir
...
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