HCNG is a vehicle fuel which is a blend of natural gas and hydrogen in various proportions, typically 8-50 vol% hydrogen. Mixtures below 20% are often referred to as Hythane™. HCNG is can bridge the gap between traditional liquid fuels and hydrogen. By using HCNG as a transition fuel and taking advantage of the CNG existing infrastructure, it is possible to start building a hydrogen infrastructure at a minimum cost, even though dedicated hydrogen vehicles, on a large scale, are 15-30 years away, many critical aspects of the whole hydrogen chain as a vehicle fuel can be investigated right away in commercial HCNG operation. Besides this benefit as a transition fuel, HCNG has its own specific advantages in terms of noxious emissions and, if in addition, the hydrogen is produced from renewable resources, HCNG could also contribute to reduced GHG emissions.
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