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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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In the study, the team examined the relationships between biodiesel fuel blend, exhaust particle oxidative potential (OP), and PM composition. OP in oxidized aerosols, including engine exhaust, is commonly quantified using the DTT (dithiothreitol) assay. PM-normalized DTT Activity for biodiesel exhaust PM. to 13.6 ± 3.8

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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

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liter Volkswagen light-duty diesel engine and Klam dynamometer running at various throttle and brake settings over a 9-mode steady-state cycle to enable triplicate time-resolved measurement of particle number distributions with a scanning mobility particle sizer. nm and a shoulder that corresponded to the B0 peak at ?51

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

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

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However, NO x emissions were higher, and the engine thermal efficiency was slightly lower with higher JBD blends. The authors tested JBD blended with FT fuel in volumetric ratios of 0:100, 25:75, 50:50, 75:25, and 100:0 (B0, B25, B50, B75, and B100). Energy Fuels , 24 (5), pp 2868–2874 doi: 10.1021/ef901317u.

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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. The engine used in the study was a 2007 Cummins ISB 6.7 Their study was published online 21 December in the ACS journal Energy & Fuels.

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