ASTM D7651-10

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Designation: D7651 − 10
Standard Test Method for
Gravimetric Measurement of Particulate Concentration of
Hydrogen Fuel
This standard is issued under the fixed designation D7651; 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 2.3 Other Standards:
California Code of Regulations ,Title 4, Division 9, Chapter
1.1 This test method is primarily intended for gravimetric
6, Article 8, Sections 4180 – 4181
determination of particulates in hydrogen intended as a fuel for
ISO 14687 Hydrogen fuel -- Product specification -- Part 1:
fuel cell or internal combustion engine powered vehicles. This
All applications except proton exchange membrane
test method describes operating and quality control procedures
(PEM) fuel cell for road vehicles
required to obtain data of known quality satisfying the require-
ments of SAE J2719 and the California Code of Regulations,
Title 4, Division 9, Chapter 6,Article 8, Sections 4180 – 4181. 3. Terminology
The levels of precision and accuracy stated. This test method
3.1 Acronyms:
can be applied to other gaseous samples requiring determina-
3.1.1 FCV—Hydrogen Fuel Cell Vehicle
tion of particulates provided the user’s data quality objectives
are satisfied.
3.1.2 PSA—Particulate sampling adapter for sampling par-
ticulate in hydrogen fuel.
1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
3.1.3 PEM—Polymer Electrolyte Membrane, also called
standard.
Proton Exchange Membrane
1.3 This standard does not purport to address all of the
3.1.4 SAE—Society of Automotive Engineering
safety concerns, if any, associated with its use. It is the
3.2 Definitions:
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
3.2.1 contaminant—impuritythatadverselyaffectsthecom-
bility of regulatory limitations prior to use.
ponents within the fuel cell system or the hydrogen storage
system
2. Referenced Documents
3.2.2 density—Massperunitofvolumeofthefuelgasorair
2.1 ASTM Standards:
being considered.
D7650 Test Method for Test Method for Sampling of Par-
ticulate Matter in High Pressure Hydrogen used as a
3.2.3 fuel cell hydrogen—hydrogen satisfying the specifica-
Gaseous Fuel with an In-Stream Filter
tions in SAE J2719.
2.2 SAE Standards:
3.2.4 weight monitoring filter, WMF—This filter is put
SAE J2719 Hydrogen Quality Guideline for Fuel Cell
inside the glove box (7.3) with balance (7.1) and not removed
Vehicles, April 2008
from the glove box (7.3). The weight of this filter is always
SAE J2600 Compressed Hydrogen Surface Vehicle Refuel-
measured before and after each measurement event.
ing Connection Devices
3.3 SAE J2719—Informational Report on the development
of a hydrogen quality guideline for fuel cell vehicles. This
ThistestmethodisunderthejurisdictionofASTMCommitteeD03onGaseous
report specifies PEM FCV hydrogen fuel quality from the
Fuels and is the direct responsibility of Subcommittee D03.14 on Hydrogen and
fueling nozzle.
Fuel Cells.
Current edition approved July 1, 2010. Published August 2010. DOI: 10.1520/
D7651–10.
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D7651 − 10
3.4 SAE J2600 Compressed Hydrogen Surface Vehicle Re- 7. Apparatus
fueling Connection Devices—This document specifies the de-
7.1 Balance—The balance must measure to 10-5 g. The
sign requirements for nozzles and receptacles used in high
balance should have the capability to download the weight
pressure hydrogen applications such as delivery from a fueling
6,7
measurement into Microsoft Excel , or a similar program, for
station to a FCV
weight recording and calibration. In order to prevent contami-
nation of particulates from ambient air, the balance must be
4. Summary of Test Method
placed inside a glove box in a small confined room with a
8,7
4.1 This procedure is for the weight determination of filters
HEPA air cleaner.
before and after collection of particulates contained within
7.2 Calibration weight–Class 1 (Class S)—categorycalibra-
hydrogen fuel or other gaseous streams at fueling station
tionweightswithatoleranceof 60.1mg.certifiedastraceable
dispenser nozzles (Test Method D7650, SAE J2600) or other
to NIST mass standards. The weights used for calibration are a
gaseous fuel delivery system dispenser interfaces. The particu-
0.05 g and 0.2 g weight, of corrosion-resistant construction.
late concentration is determined by dividing the particulate
Calibration weight is to be certified on an annual basis. The
weight,whichisthedifferenceoffilterweightsbeforeandafter
weight of the particular 0.2µm polytetrafluoroethylene (PTFE)
sampling, by the total volume of hydrogen or other gaseous
filter used in this method test was around 0.1g.
fuel passing through a filter. Every precaution should be taken
to avoid contamination of particulates 10 µm or larger onto the
7.3 Glove box—A glove box is a sealed container that, in
filter coming from the PSA, the analytical system, ambient air,
this application, is designed to allow weight measurement by
filter handling or other environmental sources.
balance without particulate contamination from ambient air.
Two gloves are generally built into the front sides of the glove
5. Significance and Use
box with entry arranged in such a way that the user can place
5.1 Low operating temperature fuel cells such as proton
their hands into the gloves and perform weight measurement,
exchange membrane fuel cells (PEMFCs) require high purity
install filters and assemble the filter holder inside the box. The
hydrogen for maximum material performance and lifetime.
glove box must be maintained clean at all times and any visual
Measurement of particulates in hydrogen is necessary for
particulate matter must be removed immediately. A HEPA
assuring a feed gas of sufficient purity to satisfy fuel cell and
vacuum can be used for cleaning purposes. A side evacuation
internal combustion system needs as defined in SAE J2719.
port or anti-chamber should also be used to minimize contami-
The particulates in hydrogen fuel for FCVs and gaseous
nating the glove box environment. The glove box should be
hydrogen powered internal combustion engine vehicles may
flushedatalltimeswithcleandryN2maintainingaRHof30%
adverselyaffectpneumaticcontrolcomponents,suchasvalves,
or less inside the glove box as determined by a data logger or
or other critical system components. Therefore, the concentra-
other device installed in the glove box.
tion of particulates in the hydrogen fuel should be limited as
7.4 Static Charge Removal Device—Astaticchargeremoval
specified by ISO 14687, SAE J2719, or other hydrogen fuel
device, such as an ionization bar, must be placed inside the
quality specifications.
glovebox(7.3)nexttothebalance.Beforemeasurementofany
5.2 Although not intended for application to gases other
material,suchasstandardweightsandfilters,thestaticcharges
than hydrogen fuel, techniques within this test method can be
on the material must be removed using a static charge removal
applied to gas samples requiring determination of particulate
device. Alternatively, anti-static strips which consist of radio-
matter.
active (α - particle) Polonium-210 strips can be used to
discharge static from weights and filters. Polonium strips
6. Interferences
should be replaced every 6 months (conservatively) or accord-
6.1 Particulate matter 10 µm or larger originating in the
ing to the useful life quoted by the manufacturer.
environmentorequipmentwillinterferewiththedetermination
7.5 Moisture/Temperature Data Logger—A data logger is
of total particulate matter collected on the filter. Every precau-
placed inside the glove box to measure both moisture and
tion should be taken to avoid contamination of particulates 10
temperature of atmosphere inside the glove box either continu-
µmorlargerontothefiltercomingfromthePSA,theanalytical
ouslyora
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