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NREL study probes emissions impact of butanol-gasoline blends in light-duty vehicles

Green Car Congress

They tested these fuels in a 2009 Honda Odyssey (a Tier 2 Bin 5 vehicle) over triplicate LA92 cycles, and determined emissions of oxides of nitrogen, carbon monoxide, non-methane organic gases (NMOG), unburned alcohols, carbonyls, and C 1 ?C C 8 hydrocarbons (particularly 1,3-butadiene and benzene).

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Study quantifies impact of fuel composition on PM emissions from gasoline direct injection engines

Green Car Congress

The GDI tailpipe particulates consist mainly of EC (elemental carbon), OM (organic matter) and small amounts of inorganic ions. 2014) “Novel Characterization of GDI Engine Exhaust for Gasoline and Mid-Level Gasoline-Alcohol Blends,” SAE Int. The mass percentage of EC in the total tailpipe PM increased as load increased.

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Perspective: US Needs to Transition to Hydrous Ethanol as the Primary Renewable Transportation Fuel

Green Car Congress

d) further provides for alcohol blends as follows: Special provisions for alcohol blends. (1) Hydrous ethanol blends (oxygenated hydrocarbons) lower engine operating temperatures due to cooling of intake fuel mixture with 3-6% more water and increasing heat of vaporization when compared to anhydrous ethanol.