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GB/T 40045-2021 PDF in English


GB/T 40045-2021 (GB/T40045-2021, GBT 40045-2021, GBT40045-2021)
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GB/T 40045-2021: PDF in English (GBT 40045-2021)

GB/T 40045-2021 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 75.160.20 F 19 Fuel specification for hydrogen powered vehicles - Liquid hydrogen (LH2) ISSUED ON: APRIL 30, 2021 IMPLEMENTED ON: NOVEMBER 01, 2021 Issued by: State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of Contents Foreword ... 3  1 Scope ... 4  2 Normative references ... 4  3 Terms and definitions ... 5  4 Requirements ... 5  5 Test methods ... 6  6 Packaging, marks, storage and transportation ... 9  Annex A (informative) Schematic diagram of the gas path of gas chromatograph ... 10  Annex B (normative) Temperature-parahydrogen content curve ... 11  Fuel specification for hydrogen powered vehicles - Liquid hydrogen (LH2) 1 Scope This Standard specifies technical indicators, test methods and requirements for packaging, marks, storage and transportation for fuel specification for hydrogen powered vehicles - liquid hydrogen (hereinafter referred to as liquid hydrogen). This Standard is applicable to liquid hydrogen - the fuel, used for proton exchange membrane fuel cell vehicles stored in storage tanks, pipelines or tank trucks. 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 3634.2, 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, Gas analysis - Determination of moisture - Part 2: Dew point method GB/T 6285, Determination of trace oxygen in gases - Electrochemical method GB/T 6681, General rules for sampling gaseous chemical products GB/T 8984, Determination of carbon monoxide carbon dioxide and hydrocarbon in gases - Gas chromatographic method GB/T 24499, Technology glossary for gaseous hydrogen, hydrogen energy and hydrogen energy system GB/T 27894.3, Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 3: Determination of hydrogen, φ6 - Carbon dioxide content, in micromoles per mole (μmol/mol); φ7 - Carbon oxide content, in micromoles per mole (μmol/mol); φ8 - Total sulfur content, in micromoles per mole (μmol/mol); φ9 - Formaldehyde content, in micromoles per mole (μmol/mol); φ10 - Formic acid content, in micromoles per mole (μmol/mol); φ11 - Ammonia content, in micromoles per mole (μmol/mol); φ12 - Total halide content, in micromoles per mole (μmol/mol). 5.3 Determination of parahydrogen content 5.3.1 Methods and instruments Use the parahydrogen conversion and measurement device to obtain the equilibrium hydrogen under the temperature zone of liquid nitrogen as the standard sample. Use thermal conductivity gas chromatography to determine parahydrogen content. The detection limit of thermal conductivity gas chromatograph for parahydrogen shall be less than 30×10-2 (volume fraction). The installation and commissioning of the instrument are carried out according to the instrument manual. Refer to Annex A for the gas flow process of the gas chromatograph. 5.3.2 Instrument conditions 5.3.2.1 Chromatographic column A stainless-steel column of which the column length is about 3m, the inner diameter is about 2mm, with built-in 13X molecular sieve, or 5A molecular sieve, or NaY molecular sieve. 5.3.2.2 Operating parameters The operating parameters of the instrument are selected according to the instrument specification and detection limit requirements. 5.3.3 Determination steps 5.3.3.1 Turn on the instrument according to the instrument manual. Adjust the operating parameters until the instrument parameters are stable. 5.3.3.2 Select appropriate chromatographic conditions, including: carrier gas flow, sample gas flow, and instrument gas path balance. 5.3.3.3 Determination of standard sample. Immerse the conversion column of determine the water content in hydrogen. When there is an objection to the determination result, the method specified in GB/T 5832.2 shall be the arbitration method. 5.5 Determination of total hydrocarbon content The determination of total hydrocarbon content is carried out in accordance with the provisions of GB/T 8984. Other equivalent methods are allowed. When there is an objection to the determination result, the method specified in GB/T 8984 shall be the arbitration law. 5.6 Determination of oxygen content The determination of oxygen content is carried out in accordance with the provisions of GB/T 6285. Other equivalent methods are allowed. When there are objections to the determination result, the method specified in GB/T 6285 shall be the arbitration law. 5.7 Determination of helium content The determination of helium content is carried out in accordance with the provisions of GB/T 27894.6. It is allowed to carry out the determination of helium content according to the method specified in GB/T 27894.3. When there are objections to the determination result, the method specified in GB/T 27894.6 shall be the arbitration method. 5.8 Determination of nitrogen and argon, carbon dioxide, carbon monoxide content The determination of the content of nitrogen, argon, carbon dioxide, and carbon monoxide shall be carried out in accordance with the provisions of GB/T 3634.2. 5.9 Determination of total sulfur, formaldehyde, formic acid, ammonia, total halide content, particulate matter concentration The determination of total sulfur, formaldehyde, formic acid, ammonia, total halide content, and particulate matter concentration shall be carried out in accordance with the provisions of GB/T 37244. Other equivalent methods are allowed. When there are objections to the determination result, the method specified in GB/T 37244 shall be the arbitration law. 6 Packaging, marks, storage and transportation The packaging, marks, storage and transportation of liquid hydrogen shall meet the requirements of GB/T 40060. ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.