A Natural gas vehicle or NGV is a alternative fuel vehicle that uses compressed natural gas (CNG) or, less commonly, liquefied natural gas (LNG) as a clean alternative to other automobile fuels. Worldwide, there are roughly 5 million NGVs as of 2006, with the largest number of NGVs in Argentina, Brazil, Iran, Pakistan and Thailand. In Europe they are popular in Germany and Italy. Asia just only starting.
The primary component of natural gas is methane (CH4), the shortest and lightest hydrocarbon molecule. It may also contain heavier gaseous hydrocarbons such as ethane (C2H6), propane (C3H8) and butane (C4H10), as well as other gases, in varying amounts. Hydrogen sulfide (H2S) is a common contaminant, which must be removed prior to most uses. Read More
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