HCNG

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HCNG-CNG pollutant emissions in comparison. Specification in grams per horsepower and hour

HCNG (or H2CNG) is a mixture of compressed natural gas (CNG) and hydrogen (H) that has been developed for over 20 years. The hydrogen content is up to 50 percent by volume, but mostly around 20%. It is used as a fuel for internal combustion engines . In principle, this fuel can be burned in any conventional natural gas engine.

advantages

The hydrogen content improves combustion and performance and reduces pollutant emissions. The emission of nitrogen oxides (NO x ) is reduced by around 50% and that of carbon dioxide by 7% compared to the combustion of pure natural gas . Compared to modern diesel engines, nitrogen oxide emissions are even reduced by 65% ​​and particulate matter emissions by 80%.

hazards

A hydrogen content of less than 50 percent in the HCNG mixture has the same risk of leakage and inflammation as pure compressed natural gas. Despite the hydrogen in the mixture, no additional measures are required to prevent hydrogen embrittlement of the materials that come into contact with the mixture.

Gas station network

HCNG filling stations exist between Bergen and Romerike in Norway and along the "British Columbia Hydrogen Highway" between Vancouver and Whistler in Canada . As far as Switzerland is concerned, there is an HCNG filling station ("mixture of natural / biogas and hydrogen (HCNG)") for Dübendorf in the canton of Zurich .

Individual evidence

  1. ^ A b Westport Innovations Inc.: Program Overview: Hydrogen Enriched Compressed Natural Gas ( Memento of February 21, 2007 in the Internet Archive ).
  2. ↑ hzwei.info, November 20, 2008: Statoil invents the HCNG vehicle ( article on archive.org ), HZwei - magazine for hydrogen and fuel cells, accessed on December 16, 2018.
  3. ↑ HCNG and hydrogen embrittlement (PDF; 51 kB).
  4. ↑ empa.ch, October 6, 2016: Refueled quickly and with a large range , accessed on January 16, 2019.

Web links