Impurities in hydrogen for fuel cells

Background

New zero-emission vehicles equipped with a polymer electrolyte fuel cell are powered by hydrogen. These fuel cells require a hydrogen quality that can only be achieved by means of modern hydrogen purification technologies, such as pressure swing adsorption or by means of selective diffusion across a palladium-coated membrane. The use of hydrogen with impurities can result in damaged fuel cells after a relatively short time.

To counteract this, guidelines for acceptable hydrogen units have been established in the international standard ISO 14687:2019. This defines the maximum allowable levels of impurities for compounds such as H2O, O2, He, N2, Ar, CO, CO2, TS, THC, HCHO, HCOOH, NH3, HBr , HCl and Cl2. EU Directive 2014/94/EU also specifies that all hydrogen filling stations must take these thresholds into account.

Solution

The V&F ComboSense is the analyzer that can measure all impurities defined in the ISO 14687:2019 standard.

This allows hydrogen manufacturers to deliver hydrogen with a certificate of analysis proving that the fuel is of satisfactory quality for vehicles.

Photo Industry Solution V&F Hydrogen Purity

Advantage

V&F on-line mass spectrometers provide very fast results compared to technologies such as instruments using gas chromatography technology. A ComboSense measures a complete set of impurities using a single setup within minutes.

The user needs only one instrument for the entire analysis, compared to several different instruments (such as GS-MS, FTIR, FID, IC, etc.) recommended in the ISO standard.

Highlights

  • Complies with the ISO 14687:2019 specification
  • A single analyzer for testing the purity of hydrogen for fuel cells
  • Fully automated analysis with generation of certificates of analysis and compliance

Reference clients (excerpt)

Reference Tokyo Gas

Reference clients (excerpt)

Reference Carburos
Reference Catarc
Reference DVGW
Reference Forschungszentrum Juelich
Reference Hycenta
Reference Indian Oil
Reference Nast
Reference OGE
Reference Tokyo Gas
Reference Unipetrol
Reference Universität Magdeburg
Reference Weichai New Energy Technology
Reference ZBT