Hydrogen fuel cell vehicles have been regarded as the main direction of future development of new energy vehicles because of their advantages of zero emissions,high driving range and strong environmental adaptability.Formaldehyde in hydrogen is toxic to fuel cells and affects the performance and service life of fuel cells.The detection limit of formaldehyde in simulated fuel hydrogen was determined by diluting formaldehyde with high purity hydrogen.With liquid nitrogen capacity as the main influence factor,the limit of formaldehyde detection in liquid nitrogen concentration and concentration determination was 3×10-9 and RSD was 2.7%.The results far exceeded the formaldehyde detection limit specified in GB/T 37244-2018.The method for determination of formaldehyde in hydrogen was further optimized to meet the requirements of relevant detection standards.
关键词
燃料氢/甲醛/液氮浓缩/检出限/气相色谱
Key words
hydrogen fuel/formaldehyde/liquid nitrogen concentration/limit of detection/gas chromatography
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