Abstract
Global acceptance and use of biofuels is growing rapidly in the transportation sector. Diminishing reserves of limited and costly fossil fuel resources and a growing realization that world peak oil production will most likely occur within the next decade is driving significant investment in sustainable biofuels. Legislative, regulatory and market forces are driving developments which seek to reduce vehicle emissions, improve fuel efficiency, lower environmental greenhouse gases and strengthen the economy. The use of alternate, sustainable, renewable fuels, preferably of domestic origin, is fostering considerable investment in new technologies. One promising technology is the addition of aliphatic alcohols to gasoline and diesel fuels. The compatibility of seal and hose materials commonly used in automotive fuel systems with conventional hydrocarbon fuels is well known. Over the past forty-five years fluorohydrocarbon elastomers have been successfully used in passenger car and truck and offhighway gasoline and petrodiesel fuel delivery and metering systems. More recently, biofuels such as ethanol have become technically and economically attractive blending constituents for gasoline and diesel fuels. These biomass fuels present their own set of material compatibility challenges to automotive fuel storage, delivery, and metering system component hardware.
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