10大汽车新能源盘点

    6. 丙烷

    保养容易、排放减少，这两个优点已使轻型车队（警车和校车）以及大家熟知的肯沃思公司（Kenworth）和彼得比尔特公司（Peterbilt）的重载卡车都用上了丙烷。目前公路上奔驰的丙烷汽车已有27万辆。丙烷也叫液化石油气（LPG），是天然气加工和原油提纯的副产品。尽管拥有较高辛烷值和燃烧清洁的特性，丙烷的成本却比汽油还要便宜三分之一。不过它必须用压力罐储存，同时丙烷加注基础设施也很少。

    6. Propane

    Ease of maintenance and reduced emissions have spurred the use of propane in light-vehicle fleets (police cars and school buses) as well as in heavy-duty trucks with such familiar nameplates as Kenworth and Peterbilt. More than 270,000 propane vehicles are now on the road. Also known as liquefied petroleum gas (LPG), propane is produced as a by-product of natural gas processing and crude oil refining. Despite a high octane rating and clean burning properties, propane costs about one-third less than gasoline. But it must be stored in a pressurized tank, and the propane refueling infrastructure is limited.