ASTM D4239-12
(Test Method)Standard Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High-Temperature Tube Furnace Combustion
Standard Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High-Temperature Tube Furnace Combustion
SIGNIFICANCE AND USE
Sulfur is part of the ultimate analysis of coal and coke.
Results of the sulfur analysis are used for evaluation of coal preparation and cleaning, evaluation of potential sulfur emissions from coal and coke combustion or conversion processes, and evaluation of coal and coke quality in relation to contract specifications, as well as for scientific purposes.
The competency of laboratories with respect to use of this standard can be established through reference to Practice D7448.
SCOPE
1.1 This test method covers the determination of sulfur in samples of coal or coke by high-temperature tube furnace combustion.
1.1.1 Two analysis methods are described.
1.2 When automated equipment is used, either method can be classified as an instrumental method.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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: D4239 − 12
StandardTest Method for
Sulfur in the Analysis Sample of Coal and Coke Using High-
1
Temperature Tube Furnace Combustion
This standard is issued under the fixed designation D4239; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope Coke by Macro Thermogravimetric Analysis
E691 Practice for Conducting an Interlaboratory Study to
1.1 This test method covers the determination of sulfur in
Determine the Precision of a Test Method
samples of coal or coke by high-temperature tube furnace
3
2.2 ISO Standard:
combustion.
ISO 11722 Solid Mineral Fuels-Hard Coal – Determination
1.1.1 Two analysis methods are described.
of Moisture in the general analysis test sample by drying
1.2 When automated equipment is used, either method can
in nitrogen
be classified as an instrumental method.
3. Summary of Test Method
1.3 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
3.1 Combustion Method A (1350°C)—A weighed test por-
standard.
tion of sample is burned in a tube furnace at a minimum
combustion tube operating temperature of 1350°C in a stream
1.4 This standard does not purport to address all of the
of oxygen. During combustion at temperatures above 1350 ºC,
safety concerns, if any, associated with its use. It is the
the sulfur and sulfur compounds contained in the sample are
responsibility of the user of this standard to establish appro-
decomposed and oxidized almost exclusively to gaseous sulfur
priate safety and health practices and determine the applica-
dioxide, SO . Moisture and particulates are removed from the
bility of regulatory limitations prior to use. 2
gas by filters. The gas stream is passed through a cell in which
sulfur dioxide is measured by an infrared (IR) absorption
2. Referenced Documents
detector. Sulfur dioxide absorbs IR energy at a precise wave-
2
2.1 ASTM Standards:
length within the IR spectrum. Energy is absorbed as the gas
D346 Practice for Collection and Preparation of Coke
passes through the cell body in which the IR energy is being
Samples for Laboratory Analysis
transmitted: thus, at the detector, less energy is received. All
D2013 Practice for Preparing Coal Samples for Analysis
other IR energy is eliminated from reaching the detector by a
D3173 Test Method for Moisture in the Analysis Sample of
precisewavelengthfilter.Thus,theabsorptionofIRenergycan
Coal and Coke
be attributed only to sulfur dioxide whose concentration is
D3176 Practice for Ultimate Analysis of Coal and Coke
proportional to the change in energy at the detector. One cell is
D3180 Practice for Calculating Coal and Coke Analyses
used as both a reference and a measurement chamber. Total
from As-Determined to Different Bases
sulfur as sulfur dioxide is detected on a continuous basis.
D7448 Practice for Establishing the Competence of Labora-
3.2 Combustion Method B (1150°C)—A weighed test por-
tories Using ASTM Procedures in the Sampling and
Analysis of Coal and Coke tion of sample is burned in a quartz combustion tube in a
stream of oxygen with an equal or excess weight of tungsten
D7582 Test Methods for Proximate Analysis of Coal and
trioxide (WO ). Sulfur is oxidized during the reaction of the
3
sample and WO . The tube furnace is operated at a minimum
3
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal combustion tube operating temperature of 1150°C and tin (Sn)
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of
sample boats are utilized. Moisture and particulates are re-
Analysis.
moved from the combustion gas by filters. The gas stream is
Current edition approved Feb. 1, 2012. Published February 2012. Originally
then passed through a cell in which sulfur dioxide is measured
approved in 1983. Last previous edition approved in 2011 as D4239 – 11. DOI:
10.1520/D4239-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from International Organization for Standardization (ISO), 1, ch. de
Standards volume information, refer to the standard’s Document Summary page on la Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http://
the ASTM website. www.iso.ch.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4239 − 12
by an infrared (IR) absorption detector.
...
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:D4239–11 Designation: D4239 – 12
Standard Test Method for
Sulfur in the Analysis Sample of Coal and Coke Using High-
1
Temperature Tube Furnace Combustion
This standard is issued under the fixed designation D4239; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 Thistestmethodcoversthedeterminationofsulfurinsamplesofcoalorcokebyhigh-temperaturetubefurnacecombustion.
1.2When automated equipment is used the procedure can be classified as an instrumental method.
1.1.1 Two analysis methods are described.
1.2 When automated equipment is used, either method can be classified as an instrumental method.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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
D3173 Test Method for Moisture in the Analysis Sample of Coal and Coke
D3176 Practice for Ultimate Analysis of Coal and Coke
D3180 Practice for Calculating Coal and Coke Analyses from As-Determined to Different Bases
D7448 PracticeforEstablishingtheCompetenceofLaboratoriesUsingASTMProceduresintheSamplingandAnalysisofCoal
and Coke
D7582 Test Methods for Proximate Analysis of Coal and Coke by Macro Thermogravimetric Analysis
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3
2.2 ISO Standard:
ISO11722 SolidMineralFuels-HardCoal–DeterminationofMoistureinthegeneralanalysistestsamplebydryinginnitrogen
3. Summary of Test Method
3.1 Combustion Method with Infrared Absorption DetectionA (1350°C)—Aweighed test portion of sample is burned in a tube
furnaceataminimumcombustiontubeoperatingtemperatureof1350°Cinastreamofoxygen.Duringcombustionattemperatures
above 1350 ºC, the sulfur and sulfur compounds contained in the sample are decomposed and oxidized almost exclusively to
gaseous sulfur dioxide, SO . Moisture and particulates are removed from the gas by filters.The gas stream is passed through a cell
2
in which sulfur dioxide is measured by an infrared (IR) absorption detector. Sulfur dioxide absorbs IR energy at a precise
wavelength within the IR spectrum. Energy is absorbed as the gas passes through the cell body in which the IR energy is being
transmitted: thus, at the detector, less energy is received.All other IR energy is eliminated from reaching the detector by a precise
wavelength filter. Thus, the absorption of IR energy can be attributed only to sulfur dioxide whose concentration is proportional
to the change in energy at the detector. One cell is used as both a reference and a measurement chamber. Total sulfur as sulfur
dioxide is detected on a continuous basis.
1
This test method is under the jurisdiction ofASTM Committee D05 on Coal and Coke and is the direct responsibility of Subcommittee D05.21 on Methods ofAnalysis.
´1
Current edition approved April 1, 2011. Published April 2011. Originally approved in 1983. Last previous edition approved in 2010 as D4239–10 . DOI:
10.1520/D4239-11.
Current edition approved Feb. 1, 2012. Published February 2012. Originally approved in 1983. Last previous edition approved in 2011 as D4239 – 11. DOI:
10.1520/D4239-12.
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.
3
Available from International Organization for Standardization (ISO), 1, ch. de la Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http://www.iso.ch.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D4239 – 12
3.2 Combustion Method B (1150°C)—A weighed test portion of sa
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