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UC Riverside study finds emissions benefits for E15 blend in California

Green Car Congress

A study by a team from UC Riverside has assessed the potential of increasing ethanol content in California reformulated gasoline (CaRFG) by investigating the exhaust emissions from a fleet of 20 Tier 3 light-duty vehicles. Acetaldehyde and ethanol emissions responded strongly with ethanol across the fleet of 20 vehicles.

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CARB releases results of multi-year E15 study; multiple air quality benefits with slight reduction in fuel economy

Green Car Congress

The California Air Resources Board (CARB) has released the results of a multiyear study evaluating exhaust emissions from the use of California Reformulated Gasoline (CaRFG) that contains 15 volume percent ethanol (E15). The vehicle test matrix had provisions for five vehicles on each emissions standards category (i.e.,

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

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Summary of significant emissions results from the fuel testing. Given equivalent deployment of butanols and ethanol, the results suggest emissions of unburned alcohols would decrease, but carbonyl emissions would increase; some of these compounds have poorly understood health effects, they note. Credit: ACS, Ratcliff et al.

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Those who flew in 2020 had twice the environmental impact of those in 2019

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Until recently, the energy intensity of domestic flying was higher than the energy intensity of driving light-duty vehicles (cars and light trucks). However, the energy intensity of flying became lower than that of long-wheel-base light-duty vehicles starting in 1995, and of short-wheel-base light-duty vehicles starting in 2005. (A

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California ARB study finds commuters’ exposures to air pollution greatly depends on mode of travel; light rail, personal vehicles the lowest

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The researchers found that electricity-powered light rail trains offer the least polluted travel environment followed by personal vehicles, while commute trips by older technology diesel-powered trains experienced the highest average air pollution levels in Sacramento. Commute modes included travel by car, bus, light rail, train, and bicycle.

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Study finds PM from biodiesel blends may be 50-80% less toxic per unit PM mass than from petroleum diesel

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However, the relative toxicity of biodiesel emissions compared to petroleum diesel remains unclear. Error bars are one standard deviation from the mean, letters indicate statistical similarity. The inset compares the absolute statistical differences in DTT PM activity (nmol/min/mg PM ) between feedstocks for the same blend.

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Researchers urge Chinese government to encourage bikes, buses and rail over cars and commercial vehicles due to emissions and health concerns

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In their paper, published in the journal Energy Policy, Ling-Yun HE and Lu-Yi QIU, observe that regulatory policies imposed on vehicle usage as well as on car ownership can not solve the growing emissions problem. billion pkm in 2014, according to the National Bureau of Statistics of China—an increase of 72.3%. —He and Qiu.

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