A Multi-Gas thermal desorber from Markes International was used to analyse impurities in hydrogen fuel. Performance criteria and detection limits were exceeded for a range of target compounds, complying with ISO-14687-2, ISO-21087 and ASTM D7892 standard methods.
Introduction
Hydrogen fuel cells offer great potential for clean, carbonneutral transportation; however, providing an unadulterated source of hydrogen can be a challenge. Contaminants introduced along the hydrogen supply chain could damage fuel cells, shorten component lifespan and increase pollution.
As hydrogen is an emerging sustainable energy source, the quality of hydrogen fuel is being closely regulated by several institutions around the world. For example, method ISO 14687-21 specifies the analysis of total sulfur compounds in hydrogen fuel, which have a maximum allowable concentration of 4 ppb, while ISO 210872 prescribes analytical methods for quality control of hydrogen fuel at distribution facilities. Method ASTM D78923 determines concentrations of total organic halides and total non-methane hydrocarbons by measurement of individual target halocarbons and hydrocarbons, including formaldehyde. SAE 27194 states that hydrogen fuel should contain less than 50 ppb total halogenates (including organic halides), 20 ppb total nonmethane hydrocarbons and 10 ppb formaldehyde.
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