Study finds biodiesel blend reduces total particle mass in emissions but may have greater adverse health effect per mass than diesel

Green Car Congress

Findings from a study by researchers from the Department of Medicine and the School of Engineering at the University of Vermont suggest that the addition of biodiesel to diesel fuels will reduce the total particle mass of PM emissions—but that the biodiesel blend particles may contribute to greater biological effects per mass than B0, leading to potentially greater health risks. nm and a shoulder that corresponded to the B0 peak at ?51 Biodiesel Diesel Emissions Fuels Health

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Birmingham study finds butanol-gasoline blend reduces GDI engine-out carbonaceous emissions; similar NOx

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viscosity and heat of vaporization) resulted in a negative impact on carbon monoxide emissions at low load due to combustion inefficiencies. On the other hand, GDI engines have reported to increase the concentration of the Particulate Matter (PM) emissions. Biobutanol Emissions Engine

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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. nmol/min/mg PM for B0 and B100, respectively, and from 22.6 ± 4.5 Biodiesel Diesel Emissions Engines Health

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Optimizing Turbo Diesels for Emissions and Performance with 5% and 20% Biodiesel Blends

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When used in diesel engines, biodiesel usually exhibits several combustion-related advantages, including reductions in CO, UHC and PM emissions, as well as a net CO 2 reduction. Prior studies have shown that higher biodiesel fuel consumption and biodiesel-NO x emissions can be mitigated to some extent via modulation of four engine parameters—air/fuel ratio (AFR), exhaust gas recirculation (EGR) fraction, injection (rail) pressure, and start of main fuel injection (SOI)—alone or in concert.

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Jatropha Biodiesel-FT Blends Reduce Most Criteria Pollutants Compared to Neat FT; Higher NOx

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Blending jatropha biodiesel (JBD) with Fischer-Tropsch synthetic diesel (FT) results in lower CO, THC, smoke and PM emissions compared to neat FT, according to a study by researchers at the Norwegian University of Science and Technology (NTNU) published in the ACS journal Energy & Fuels. However, NO x emissions were higher, and the engine thermal efficiency was slightly lower with higher JBD blends. Higher cetane number was also an additional reason for lower emissions.

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