ASTM D7459-08
(Practice)Standard Practice for Collection of Integrated Samples for the Speciation of Biomass (Biogenic) and Fossil-Derived Carbon Dioxide Emitted from Stationary Emissions Sources
Standard Practice for Collection of Integrated Samples for the Speciation of Biomass (Biogenic) and Fossil-Derived Carbon Dioxide Emitted from Stationary Emissions Sources
SIGNIFICANCE AND USE
Greenhouse gases are reported to be a major contributor to global warming. Since “biomass CO2” emitted from combustion devices represents a net-zero carbon contribution to the atmosphere (that is, plants remove CO2 from the atmosphere and subsequent combustion returns it), it does not contribute additional CO2 to the atmosphere. The measurement of biomass (biogenic) CO2 allows regulators and stationary source owners/operators to determine the ratio of fossil-derived CO2 and biomass CO2 in developing control strategies and to meet federal, state, local and regional greenhouse gas reporting requirements.
The distinction of the two types of CO2 has financial, control and regulatory implications.
SCOPE
1.1 This practice defines specific procedures for the collection of gas samples from stationary emission sources for subsequent laboratory determination of the ratio of biomass (biogenic) carbon to total carbon (fossil derived carbon plus biomass or biogenic carbon) in accordance with D 6866.
1.2 This practice applies to stationary sources that burn municipal solid waste or a combination of fossil fuel (for example, coal, oil, natural gas) and biomass fuel (for example, wood, wood waste, paper, agricultural waste, biogas) in boilers, combustion turbines, incinerators, kilns, internal combustion engines and other combustion devices.
1.3 This practice applies to the collection of integrated samples over periods from 1 hour to 24 hours, or longer.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D7459 − 08
StandardPractice for
Collection of Integrated Samples for the Speciation of
Biomass (Biogenic) and Fossil-Derived Carbon Dioxide
Emitted from Stationary Emissions Sources
This standard is issued under the fixed designation D7459; 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 2.2 Federal Standards:
40 CFR 60Appendix B, Performance Specification
1.1 This practice defines specific procedures for the collec-
40 CFR 60Appendix A, Reference Method
tion of gas samples from stationary emission sources for
UncertaintiesInNon-ProportionalSampling,Part75Policy
subsequent laboratory determination of the ratio of biomass
AndCommunicationEfforts,EPAContractNo.EP-W-07-
(biogenic) carbon to total carbon (fossil derived carbon plus
064, WorkAssignment No. 0-8, Task No. 6 (February 15,
biomass or biogenic carbon) in accordance with D6866.
2008 – Draft)
1.2 This practice applies to stationary sources that burn
municipal solid waste or a combination of fossil fuel (for
3. Terminology
example, coal, oil, natural gas) and biomass fuel (for example,
3.1 Definitions—For additional definitions of terms used in
wood, wood waste, paper, agricultural waste, biogas) in
this practice, refer to Terminology D1356 and Test Methods
boilers, combustion turbines, incinerators, kilns, internal com-
D6866.
bustion engines and other combustion devices.
3.2 Definitions of Terms Specific to This Standard:
1.3 This practice applies to the collection of integrated
3.2.1 biomass (biogenic) CO,n— CO recently removed
2 2
samples over periods from 1 hour to 24 hours, or longer.
fromtheatmospherebyplants,thenreturnedtotheatmosphere
1.4 The values stated in SI units are to be regarded as
by combustion or biogenic decay.
standard. No other units of measurement are included in this
3.2.1.1 Discussion—BiomassCO emittedfromcombustion
standard.
devices is often referred to as “carbon-neutral CO .”
3.2.1.2 Discussion—Biomass carbon contains the isotope
1.5 This standard does not purport to address all of the
radiocarbon(carbon-14)inmeasurablequantities.Radiocarbon
safety concerns, if any, associated with its use. It is the
is a radioactive isotope of the element carbon, carbon-14,
responsibility of the user of this standard to establish appro-
having 8 neutrons, 6 protons, and 6 electrons making up 1 ×
priate safety and health practices and determine the applica-
-12
10 naturalabundanceofcarbononearth.Itdecaysexponen-
bility of regulatory limitations prior to use.
tially with a half-life of about 5700 years and as such is not
2. Referenced Documents
measurable in fossil materials derived from petroleum, coal,
natural gas or any other source more than about 50,000 years
2.1 ASTM Standards:
old.
D1356Terminology Relating to Sampling and Analysis of
Atmospheres
3.2.2 constant rate sampling, n—sampling conducted at a
D4840Guide for Sample Chain-of-Custody Procedures
fixed sampling rate.
D6866Test Methods for Determining the Biobased Content
3.2.3 Fossil CO,n—CO introduced into the atmosphere
2 2
of Solid, Liquid, and Gaseous Samples Using Radiocar-
through the combustion or thermal dissociation of fossil
bon Analysis
materials.
3.2.3.1 Discussion—Fossil-derived CO is void of radiocar-
1 bon and consists entirely of the “stable carbon” isotopes
ThispracticeisunderthejurisdictionofASTMCommitteeD22onAirQuality
and is the direct responsibility of Subcommittee D22.03 on Ambient Atmospheres
carbon-13 (having 7 neutrons, 6 protons, and 6 electrons)
and Source Emissions.
making up 1.2% natural abundance carbon on earth and
Current edition approved Aug. 1, 2008. Published August 2008. DOI: 10.1520/
D7459-08.
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 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Standards volume information, refer to the standard’s Document Summary page on Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
the ASTM website. www.dodssp.daps.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7459 − 08
carbon-12 (having 6 neutrons, 6 protons, and 6 electrons) and 6.2 Condenser—Air-cooled, water-cooled, or other con-
making up 98.8% natural abundance carbon on earth. densertoremoveexcessmoisturethatwouldinterferewiththe
operationofthepumpandflowmeter.Thecondensermustnot
3.2.4 proportional sampling, n—sampling conducted such
remove any CO . The condenser may be omitted if the
that the ratio of the sampling rate to stack gas velocity or
moisture concentrations are too low for condensation, for
volumetric flow rate is constant.
example, after dilution CEMS.
3.2.5 speciation, n—identificationofthebiomassandfossil-
NOTE 4—CO is slightly soluble in water; its effect is estimated to be
derived CO components within bulk air effluents.
less than about 0.2%. Acid gases (for example, SO , HCl) reduce the
3.2.6 sub-sampling, n—the process of taking a representa-
solubility of CO to a negligible level. In addition, since the method
tive smaller amount of sample volume from a large bulk
involves ratios of biomass to fossil derived CO , any solubility (if any) of
CO in water does not affect the results.
sample volume.
6.3 Valve—Needle valve, or equivalent, to adjust sampling
4. Summary of Practice
flow rate. The valve may be omitted if a pump that samples at
4.1 Representative gas samples are collected at a constant
a constant rate is used.
rate from stationary emission sources into portable containers
6.4 Pump—Leak-free diaphragm-type pump, or equivalent,
for shipment to off-site analytical facilities performing D6866
totransportsamplegastotheflexiblebag.Itmaybenecessary
analysis.
to install a small surge tank between the pump and rate meter
NOTE 1—The complexity of the analytical method requires analysis to
to eliminate the pulsation effect of the diaphragm pump on the
be performed off-site.
rotameter.
4.2 If the variability of stack gas velocity or CO
6.5 Rate Meter—Rotameter, or equivalent rate meter, ca-
concentration, or both, is beyond specified limits, proportional
pable of measuring sample flow rate to within 62.0% of the
rate sampling may need to be used. See Section 8.
selected flow rate.
NOTE 2—The majority of combustion sources are such that their
6.6 Sample Container—Air tight vessel that is compatible
operational conditions do not vary significantly and, hence, constant rate
with the system design, which includes flexible bags, evacu-
sampling would provide representative samples. However, there are some
sources, for example, peaking units, whose effluent flow rate (velocity) atedcanisterssuchasSummacanisters,vacutainer,Tedlarbag,
andCO concentrationsvaryconsiderably.Insuchcases,itisnecessaryto
or syringes.
sample proportionally. Guidelines are given on when proportional sam-
6.6.1 The capacity of the sample container must be large
pling is necessary.
enough to contain at least 2 cm of CO (sample container
5. Significance and Use
capacity (L) × %CO ×10≥2cm ) at the end of the sampling
period.
5.1 Greenhousegasesarereportedtobeamajorcontributor
6.6.2 Ifsub-samplesareusedforshipmenttothelaboratory,
to global warming. Since “biomass CO ” emitted from com-
thendeterminethesizeofthesub-samplecontainersuchthatit
bustiondevicesrepresentsanet-zerocarboncontributiontothe
will contain at least 2 cm of pure CO .
atmosphere (that is, plants remove CO from the atmosphere
and subsequent combustion returns it), it does not contribute
6.7 Flow Rate Indicator—Indicator that is proportional to
additional CO to the atmosphere. The measurement of bio-
stack gas velocity or volumetric flow rate. The following are
mass (biogenic) CO allows regulators and stationary source
2 acceptable indicators: Type S pitot tube (velocity pressure, as
owners/operators to determine the ratio of fossil-derived CO
measured by manometer, transducer, etc.); ultrasonic,
and biomass CO in developing control strategies and to meet
2 scintillation, thermal or other continuous flow devices; steam
federal, state, local and regional greenhouse gas reporting
rates, boiler feed water, power generation (MW), process
requirements.
loads, fuel rates, or other proportional effluent flow equiva-
lents.
5.2 The distinction of the two types of CO has financial,
con
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