Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by and is under the jurisdiction of the National Technical Committee on Hydrogen Energy of Standardization Administration of China (SAC/TC 309).
Fuel specification for proton exchange membrane fuel cell vehicles - Hydrogen
1 Scope
This standard specifies the terms and definitions, hydrogen purity, requirements of impurity content in hydrogen and the analytical test methods for hydrogen fuel used for proton exchange membrane fuel cell (PEMFC) vehicles.
It is applicable to the quality requirements of hydrogen fuel used for PFSA proton exchange membrane fuel cell vehicles.
Note: Molecular formula of hydrogen: H2. The relative molecular mass is 2.01588 (as per 2007 international relative atomic mass).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 3634.1-2006 Hydrogen - Part 1: Industrial hydrogen
GB/T 3634.2-2011 Hydrogen - Part 2: Pure hydrogen, high pure hydrogen and ultrapure hydrogen
GB/T 3723 Sampling of chemical products for industrial use - Safety in sampling
GB/T 5832.2-2016 Gas analysis - Determination of moisture - Part 2: Dew point method
GB/T 6285-2016 Determination of trace oxygen in gases - Electrochemical method
GB/T 6680 General rules for sampling liquid chemical products
GB/T 6681 General rules for sampling gaseous chemical products
GB/T 8984-2008 Determination of carbon monoxide carbon dioxide and hydrocarbon in gases - Gas chromatographic method
GB/T 14669-1993 Air quality - Determination of ammonia - Ion selective electrode method
GB/T 15432-1995 Ambient air - Determination of total suspended particulates - Gravimetric method
GB/T 16129-1995 Standard method for hygienic examination of formaldehyde in air of residential areas - Spectrophotometric method
GB/T 27894.3-2011 Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 3: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C8 using two packed columns
GB/T 28816 Fuel cell - Terminology
ASTM D7652 Standard test method for determination of trace hydrogen sulfide, carbonyl sulfide, methyl mercaptan, carbon disulfide and total sulfur in hydrogen fuel by gas chromatography and sulfur chemiluminescence detection
ASTM D7653 Standard test method for determination of trace gaseous contaminants in hydrogen fuel by Fourier transform infrared (FTIR) spectroscopy
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 28816, GB/T 3634.1-2006, GB/T 3634.2-2011 and the following apply.
3.1
total sulfur compounds
sulfides in hydrogen present in various forms such as sulfur dioxide (SO2), hydrogen sulfide (H2S), carbonyl sulfide (COS) and methyl sulfhydryl (CH3SH)
3.2
total halogenated compounds
halides in hydrogen present in various forms such as hydrogen chloride (HCl), hydrogen bromide (HBr), chlorine (Cl2) and organic halide (R-X)
4 Requirements
The technical indexes of hydrogen fuel shall meet those specified in Table 1.
Table 1 Technical indexes
Item Index
Hydrogen purity (molar fraction) 99.97%
Total amount of non-hydrogen gas 300μmol/mol
Maximum concentration of single impurity
Water (H2O) 5μmol/mol
Total hydrocarbon (by methane) a 2μmol/mol
Oxygen (O2) 5μmol/mol
Helium (He) 300μmol/mol
Total nitrogen (N2) and argon (Ar) 100μmol/mol
Carbon dioxide (CO2) 2μmol/mol
Carbon monoxide (CO) 0.2(mol/mol
Total sulfur compounds (by H2S) 0.004μmol/mol
Formaldehyde (HCHO) 0.01μmol/mol
Formic acid (HCOOH) 0.2μmol/mol
Ammonia (NH3) 0.1μmol/mol
Total halogenated compounds (by halide ion) 0.05μmol/mol
Maximum concentration of particulate matters 1mg/kg
a When the methane concentration exceeds 2μmol/mol, the total concentration of methane, nitrogen and argon shall not exceed 100mol/mol.
5 Test methods
5.1 Sampling, determination and re-inspection
5.1.1 The sampling, determination and re-inspection of hydrogen products shall be in accordance with GB/T 3634.1-2006.
5.1.2 The safety matters in sampling shall be in accordance with GB/T 3723.
5.1.3 The sampling principle and general rules of gas sample shall be in accordance with GB/T 6681.
5.1.4 The compressed gas shall be decompressed by needle valve and then sent into the inspection equipment through sampling pipe.
5.1.5 The sampling of liquid hydrogen shall be in accordance with GB/T 6680. After vaporizing, the sample is directly sent into the inspection equipment through a passivated metal connecting pipe.
5.1.6 The gas transported by pipeline shall be sampled at the sampling points, and the samples shall be sent into the inspection equipment through the sampler or sampling pipe.
5.1.7 During sampling of normal or negative pressure sample, the aspirator is used to pump the sample directly into the inspection equipment.
5.1.8 The air tightness of the sampling gas pipeline shall be strictly guaranteed, and metal pipes should be adopted to prevent the environmental gas from polluting the samples.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Test methods
Annex A (Normative) Method for determining the content of total halogenated compounds
