2. LPG fuel (LPG-C)

Liquefied petroleum gases (LPG) are mixtures of hydrocarbons with three or four carbon atoms, stored in a liquid state at low pressure (a few bar) and used either in a gaseous state, after expansion to atmospheric pressure, or in a liquid state via a suitable injection system. They are produced both by natural gas purification operations during extraction and by various crude oil refining units.

The LPG-C sector is fairly well developed in some countries, such as the Netherlands, Italy and South Korea, where it accounts for a significant proportion of the total vehicle fleet (5 to 10%). In Japan, and Tokyo in particular, urban cabs most often run on LPG. All over...