ASTM D8339-20

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: D8339 − 20
Standard Test Method for
The Analysis of Flue Gas Desulfurization Solids by Macro
1
Thermogravimetric Analysis
This standard is issued under the fixed designation D8339; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E691Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1.1 This instrumental test method covers the determination
E1601Practice for Conducting an Interlaboratory Study to
of free moisture, gypsum (CaSO •2H O), calcium sulfite
4 2
Evaluate the Performance of an Analytical Method
hemihydrate (CaSO •½H2O), calcium hydroxide (Ca(OH) ),
3 2
calciumcarbonate(CaCO ),andashinfluegasdesulfurization
3 3. Terminology
solids using a macro thermogravimetric analyzer.
3.1 Definitions of Terms Specific to This Standard:
1.2 This instrumental test method is not applicable to
3.1.1 flue-gas desulfurization solids, n—generally are finely
thermogravimetric analyzers using microgram size samples.
divided materials containing various amounts of free moisture.
3.1.1.1 Discussion—The origin of the materials is dewa-
1.3 Units—The values stated in SI units are to be regarded
teredslurriesresultingfromtheabsorptionofsulfurdioxideby
as standard. The values given in parentheses after SI units are
slurries of lime or limestone fines in a flue gas desulfurization
provided for information only and are not considered standard.
process.
1.4 This standard does not purport to address all of the
3.1.2 free moisture, n—the moisture that evolves from
safety concerns, if any, associated with its use. It is the
flue-gas desulfurization solids, clay materials, hydrated lime,
responsibility of the user of this standard to establish appro-
and similar materials, when they are heated at temperatures
priate safety, health, and environmental practices and deter-
ranging from 45°C to 60°C until a constant mass is reached.
mine the applicability of regulatory limitations prior to use.
3.1.2.1 Discussion—Free moisture in these materials is not
1.5 This international standard was developed in accor-
thesameasthefreemoistureincoal,asdefinedinTerminology
dance with internationally recognized principles on standard-
D121.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3.2 For definitions of other terms used in this test method,
mendations issued by the World Trade Organization Technical
refer to Terminology D121.
Barriers to Trade (TBT) Committee.
4. Summary of Test Method
2. Referenced Documents
4.1 In thermogravimetric analysis, the mass of a sample in
2
a controlled atmosphere is recorded repeatedly as a function of
2.1 ASTM Standards:
temperature or time, or both. Macro thermogravimetric analy-
D121Terminology of Coal and Coke
sis (macro TGA) of flue gas desulfurization solids (FGD-
D3180Practice for Calculating Coal and Coke Analyses
Solids) uses a sample mass of approximately 1 g. In a typical
from As-Determined to Different Bases
analysis, the temperature is normally ramped from ambient to
D8146Guide for Evaluating Test Method Capability and
a specific temperature and held at that temperature for a
Fitness for Use
prescribed length of time, and the correspondent specimen
E177Practice for Use of the Terms Precision and Bias in
mass is repeatedly recorded by the instrument.
ASTM Test Methods
4.2 FGD-Solids components: free moisture, gypsum, cal-
cium sulfite hemihydrate, calcium hydroxide, calcium
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal carbonate, and ash are sequentially determined in a single
and Coke and is the direct responsibility of Subcommittee D05.29 on Major
multi-step heating program. The analysis of a particular com-
Elements in Ash and Trace Elements of Coal.
ponentiscompletewhenthespecimenreachesaconstantmass
Current edition approved July 1, 2020. Published September 2020. DOI:
or at the end of the step.
10.1520/D8339-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.3 Free Moisture is determined by measuring the mass
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
loss, caused by evaporating free water from the analysis
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. specimen when heated to 50°C.
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