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ASTM D4931-06

(Test Method)

Standard Test Method for Gross Moisture in Green Petroleum Coke

Standard Test Method for Gross Moisture in Green Petroleum Coke

SIGNIFICANCE AND USE
Moisture adds weight to the coke and serves no useful purpose. A knowledge of the moisture content is important in the purchase and sale of green petroleum coke, both of which are conducted on a dry basis.
The collection of the sample as specified for the Drying Oven Method is intended for the express purpose of determining the total moisture of green petroleum coke. The standard is available to producers, sellers, and consumers for determination when other techniques or modifications are not mutually agreed on.
The Preparation Procedure is used only when sample contains free water. Obtaining a representative sample of a coke source is compounded by the presence of free water.
SCOPE
1.1 This test method covers both the preparation procedure for samples containing free water (air drying loss (ADL) on gross moisture samples) and the determination of the gross moisture content of green petroleum coke.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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
30-Jun-2006
ICS
75.160.10 - Solid fuels
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.05 - Properties of Fuels, Petroleum Coke and Carbon Material
Current Stage
Ref Project

Relations

Replaces
ASTM D4931-92(2002) - Standard Test Method for Gross Moisture in Green Petroleum Coke
Effective Date
01-Jul-2006
Replaced By
ASTM D4931-06(2011) - Standard Test Method for Gross Moisture in Green Petroleum Coke
Effective Date
01-May-2011
Referred By
ASTM D6969-23 - Standard Practice for Preparation of Calcined Petroleum Coke Samples for Analysis
Effective Date
01-Jul-2006

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ASTM D4931-06 - Standard Test Method for Gross Moisture in Green Petroleum Coke
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4931–06
Standard Test Method for
1
Gross Moisture in Green Petroleum Coke
This standard is issued under the fixed designation D4931; 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* 3.1.4 green petroleum coke, n—same as raw petroleum
coke.
1.1 This test method covers both the preparation procedure
3.1.5 gross moisture, n—that moisture determined as the
for samples containing free water (air drying loss (ADL) on
loss in mass in an air atmosphere under rigidly controlled
gross moisture samples) and the determination of the gross
conditions of temperature, time, and air flow.
moisture content of green petroleum coke.
3.1.5.1 Discussion—Test Method D3302 prescribes the
1.2 The values stated in SI units are to be regarded as
above controlled conditions.
standard. The values given in parentheses are for information
3.1.6 petroleum coke, n—solid, carbonaceous residue pro-
only.
duced by thermal decomposition of heavy petroleum fractions,
1.3 This standard does not purport to address all of the
or cracked stocks, or both.
safety concerns, if any, associated with its use. It is the
3.1.7 residual moisture, n—that moisture remaining in the
responsibility of the user of this standard to establish appro-
sample after air drying.
priate safety and health practices and determine the applica-
3.1.8 total moisture, n—synonym for gross moisture.
bility of regulatory limitations prior to use.
4. Summary of Test Method
2. Referenced Documents
2
4.1 This test method is based on the loss in mass of a green
2.1 ASTM Standards:
petroleum coke sample in an air atmosphere under controlled
D2013 Practice for Preparing Coal Samples for Analysis
conditions of temperature, time, and air flow.
D2234/D2234M Practice for Collection of a Gross Sample
4.1.1 Preparation Procedure shall be used when the petro-
of Coal
leum coke sample contains free water. The gross moisture
D3302 Test Method for Total Moisture in Coal
sample is weighed and air dried to equilibrate it with the
E11 SpecificationforWovenWireTestSieveClothandTest
atmosphere. Determination of residual moisture is that deter-
Sieves
mined using the Drying Oven Method.Air drying and residual
3. Terminology moisture losses are combined to report gross moisture.
4.1.2 Drying Oven Method shall be used in routine com-
3.1 Definitions of Terms Specific to This Standard:
mercial practice when the sample does not contain free water.
3.1.1 air drying, n—a process of partial drying of a green
The sample is crushed to at least minus 25 mm (1 in.) top sieve
petroleum coke sample to bring it to near equilibrium with the
size and divided into analytical portions of at least 500 g each.
atmosphere in the room in which further reduction/division of
Determinationoftotalgrossmoistureiscalculatedbysumming
the petroleum coke sample is to take place.
the results of the Drying Oven Method and the results of the
3.1.2 air dry loss (ADL), n—the loss in mass, expressed as
Preparation Procedure.
a percentage, resulting from each air drying operation.
3.1.3 free water, n—visible unbound water in the sample.
5. Significance and Use
5.1 Moisture adds weight to the coke and serves no useful
1
This test method is under the jurisdiction of ASTM Committee D02 on
purpose. A knowledge of the moisture content is important in
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
the purchase and sale of green petroleum coke, both of which
D02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.
are conducted on a dry basis.
Current edition approved July 1, 2006. Published August 2006. Originally
approved in 1989. Last previous edition approved in 2002 as D4931–92(2002).
5.2 The collection of the sample as specified for the Drying
DOI: 10.1520/D4931-06.
Oven Method is intended for the express purpose of determin-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ing the total moisture of green petroleum coke. The standard is
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

---------------------- Page: 1 ----------------------
D4931–06
available to producers, sellers, and consumers for determina- 6.2 Drying Pans:
tion when other techniques or modifications are not mutually 6.2.1 Pans for the gross moisture sample (Preparation
ag
...

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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).  
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5.1 The crystallinity of petroleum coke, as reflected by the Lc  value, is a general measure of quality affecting suitability for end use and is a function of the heat treatment.  
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SCOPE
1.1 This test method covers the determination of the mean crystallite thickness of a representative, pulverized sample of calcined petroleum coke by interpretation of a X-ray diffraction pattern produced through conventional X-ray scanning techniques.  
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1.3 The values stated in SI (metric) units are to be regarded as the standard. The inch-pound units given in parentheses are provided for information purposes only.  
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