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

Green Car Congress

They found that total particulate gravimetric mass collected over the engine test cycle was more than 2 times higher for B0 than for B20 fuel. Particle number distributions aggregated over one example drive cycle indicate a unimodal B0 distribution centered at 51 nm, but a B20 distribution with a smaller diameter mode at 32.2

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

Green Car Congress

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. nmol/min/mg PM for B0 and B100, respectively, and from 22.6 ± 4.5 PM-normalized DTT Activity for biodiesel exhaust PM. Click to enlarge.

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

Green Car Congress

A team at the University of Birmingham reports that a blend of 33% v/v of butanol in EN228 commercial gasoline containing 5% of ethanol (B33) reduces GDI (gasoline direct injection) engine-out carbonaceous emissions, while maintaining similar levels of NO x emissions when compared to standard gasoline combustion at low and medium engine loads.

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Massachusetts to Accept Only Waste-Derived Biofuels to Qualify for Mandate for Diesel and Home Heating Oil

Green Car Congress

All biofuels must meet high standards for reduction of greenhouse gas emissions over their entire lifecycles (growing, processing, and combustion) in order to qualify for the content mandate. Low Carbon Fuel Standard. Low Carbon Fuel Standard. The Mandate.