HCNG (or H2CNG) is a mixture of compressed natural gas and 4-9 percent hydrogen by energy.[1] It is used as a fuel gas for internal combustion engines[2] and home appliances. Hydrogen contents of less than 50% in the HCNG blend have leakage and flammability risks similar to those of CNG alone[citation needed]. With the hydrogen being part of the mixture, there are no special precautions needed to avoid hydrogen embrittlement of the materials coming in contact with the mixture.[3] HCNG dispensers can be found at Hynor (Norway) Thousand palms and Barstow California[4] Fort Collins Colorado, Dunkerque, Grenoble and Toulouse (France)[5] Goteborg Sweden, Dwarka and Faridabad[6] (Delhi), India [7] and the BC hydrogen highway in Canada.
HCNG for mobile use is premixed at the hydrogen station.
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Research
Testing is underway in Ameland for a 3 year field testing until 2010 were 20 % hydrogen is added to the local CNG distribution net, the appliances involved are kitchen stoves condensing boilers and micro-CHP boilers[8][9]. To get the most out of a ICE in transportation if higher levels of hydrogen are added modifications have to be made in the corresponding engine and the control strategy[10][11][12].
Codes and Standards
The National Fire Protection Association 52 presently covers CNG and hydrogen fueling stations. Blends with < 20% hydrogen by volume are treated identically to CNG[13]
See also
References
- ^ DOE HCNG
- ^ Test of blends of hydrogen and natural gas in a light-duty vehicle
- ^ HCNG and hydrogen embrittlement
- ^ California Air Resources Board to Lease HICE Vehicles
- ^ ALT-HY-TUDE Project
- ^ Hydrogen-CNG mix to fuel Games vehicles
- ^ Hydrogen-CNG Fuel To Debut During Games
- ^ Micro-CHP
- ^ Ameland Field testing
- ^ A Study on quasi-dimensional combustion model of a spark ignition HCNG engine suitable for various hydrogen fractions
- ^ Natural gas vehicle research roadmap -Pag.22
- ^ High-percentage hydrogen/cng blend Ford F-150 operating summary
- ^ Hydrogen enriched natural gas technology-pag.36
External links
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