background

Rapid development of hydrogen energy:The global hydrogen fuel cell vehicle industry is experiencing explosive growth, and hydrogen energy has become a strategic industry for national new energy development.

The impact of hydrogen impurities:At present, most of the hydrogen production capacity in China comes from fossil fuel hydrogen production and chemical by-product hydrogen. The products usually include impurity gases such as CO, CO ₂, H ₂ S, carbonyl sulfide, etc. Among them, H ₂ S and other impurities are typical fuel cell catalyst poisons, which weaken catalytic activity and affect fuel cell life.

Quality requirements for hydrogen energy:The "Hydrogen Fuel for Proton Exchange Membrane Fuel Cell Vehicles" (GB/T37244-2018) specifies the impurities such as total sulfur, formaldehyde, and formic acid in hydrogen fuel

There are clear limit requirements for the concentration of hydrogen gas, and it is imperative to analyze impurities such as H ₂ S in hydrogen gas.

standard basis

GB/T 37244-2018 Proton Exchange Membrane Fuel Cells Fuel Hydrogen for Vehicles

ASTM D7652-2011 Determination of Trace Hydrogen Sulfide, Carbonyl Sulfur, Methyl Mercaptan, Carbon Disulfide, and Total Sulfur in Hydrogen Fuel Gas Chromatography Sulfur Chemiluminescence Detection Method

T/CECA-G 0180-2022 Determination of sulfur-containing compounds, formaldehyde, and organic halides in hydrogen by pre concentration/gas chromatography sulfur chemiluminescence and mass spectrometry detection method

Testing components

In order to ensure the quality of hydrogen, the impurity content in hydrogen must meet the requirements of "Hydrogen Fuel for Proton Exchange Membrane Fuel Cell Vehicles" (GB/T37244-2018).

Note: The total sulfur mentioned above includes sulfurtransformTen types of sulfides, including hydrogen, carbonyl sulfide, methyl mercaptan, ethyl mercaptan, dimethyl sulfide, carbon disulfide, methyl ethyl sulfide, thiophene, and diethyl sulfide.

BCT 990H hydrogen energy battery impurity analyzer

Beijing Boside has developed the BCT 990H hydrogen energy impurity analyzer based on the requirements of "Hydrogen Fuel for Proton Exchange Membrane Fuel Cell Vehicles" (GB/T37244-2018) and the difficulties and common problems in the actual analysis of impurities in hydrogen gas, combined with the hardware and quality control requirements of the concentration system by EPATO15 and HJ759 standard methods. It can achieve single needle injection analysis of 12 components such as sulfides, formaldehyde, formic acid, etc. in hydrogen fuel for automobiles, with a detection limit lower than the maximum allowable concentration limit in the national standard by more than one order of magnitude.

Specialized capture trap

The dedicated capture trap design overcomes the problems of easy residue in the packing trap, slow resolution speed, high carrier gas flow rate (requiring split injection), and easy decomposition of the measured substance (such as formic acid)

Accurate volume measurement

The injection range is 5-1000ml, the injection accuracy is ≤ 1ml, and it can achieve sample volume measurement for different matrices, such as hydrogen matrices, with accurate volume measurement and high precision

System without adsorption

All sample flow paths have undergone inerting treatment and strict inertness testing to avoid adsorption of target substances and ensure high recovery rates

Avoid cross contamination

The design of CNC valves can rotate the valve core to any position, isolate the trap and sample, and better avoid cross contamination

Highly adaptable

The testing concentration range can reach the level of 0.01 ppb ppm, suitable for trace impurity analysis in hydrogen products and impurity analysis in hydrogen semi-finished products

Specifications

方法性能

1. Detection limit, precision, and accuracy
The detection limits of each target component are more than one order of magnitude lower than their standard limits, with precision less than 10% and accuracy between 90% and 110%. Excellent detection limits, precision, and accuracy levels can accurately reflect the content of impurities in hydrogen gas, which is beneficial for evaluating the impact of impurities on fuel cells.

2. Test spectrum

3. Calibration curve

The correlation coefficients of all component calibration curves are above 0.99.