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The aim of this study is to evaluate the land requirement, energy consumption and GHG (greenhouse gases) emissions of microalgal biodiesel (M-BD) and Jatropha curcas seeds (J-BD) based biodiesel from the perspective of life cycle assessment (LCA). ...The well to pump (WTP) stage for microalgal biodiesel had higher fossil energy requirement but lower petroleum energy consumption and GHG emissions compared to Jatropha curcas and conventional diesel (CD). The WTP energy efficiency for J-BD100 and M-BD 100 were 26% and 17.4%, respectively. ...The WTW results showed good performance for MBD100 on petroleum consumption and GHG emissions. The high fossil energy use for microalgae BD100 was attributed to the large inputs for microalgae growth, including fertilizer and process fuels.

This paper focused on the fuel consumption and GHG reductions. The fuel consumption was determined by volumetric, mass and energy per km travelled and per ton of GVW. ...The substitution ratio of PD by the C2G Ultra Biofuel is 86∼91% and 74∼81% for hot start and cold start trips respectively. The GHG reductions by the C2G Ultra Biofuel are 85∼89% and 73∼78% for hot start and cold start trips respectively.

A fuel selection process was also completed and B20 Biodiesel was selected as the primary fuel due to lower GHG (Greenhouse Gases) emissions and Embry-Riddle's ability to produce biodiesel onsite using the cafeteria's discarded vegetable oil.

Therefore this study confirms the benefits of the biodiesel use also on the current automotive engines, reducing simultaneously their environmental impact in terms of GHG and smoke emissions.

Biofuels offer the benefits of lower and even negative GHG emissions, sustainability, and domestic fuel production. The herbaceous and woody biomass–based ethanol options are more attractive than producing ethanol and biodiesel from food products.

Not evident tendencies can be drawn about the improvement of GHG reduction (i.e. N2O and CO2) by splitting the diesel pilot injection. However, a strategy when the pre and the main injections being set closer to TDC, proves to be the best configuration due to the improvement of the combustion process, with a minimum diesel energy amount.

Changes in GHG and BSFC varied with the different bioblends and test modes. Emissions of CO and HC were found to be at or near ambient background levels.

The experimental test results indicate that biodiesel produced with heterogeneous catalyst (CaO) showed more power than its counterpart. The GHG emission (CO2) is slightly higher for B50C & B100C. In the case of NOx emissions, it is higher for blends and particularly for B50C & B100C as the flash point is higher leading to increased combustion temperature.

Biofuel usage is increasingly expanding thanks to its significant contribution to a well-to-wheel (WTW) reduction of greenhouse gas (GHG) emissions. In addition, stringent emission standards make mandatory the use of Diesel Particulate Filter (DPF) for the particulate emissions control.

The University of Wisconsin - Madison Hybrid Vehicle Team has designed, fabricated, tested and optimized a four-wheel drive, charge sustaining, split-parallel hybrid-electric crossover vehicle for entry into the 2006 Challenge X competition. This multi-year project is based on a 2005 Chevrolet Equinox platform. Trade-offs in fuel economy, greenhouse gas impact (GHGI), acceleration, component packaging and consumer acceptability were weighed to establish Wisconsin's Vehicle Technical Specifications (VTS). Wisconsin's Equinox, nicknamed the Moovada, utilizes a General Motors (GM) 110 kW 1.9 L CIDI engine coupled to GM's 6-speed F40 transmission. The rear axle is powered by a 65 kW Ballard induction motor/gearbox powered from a 44-module (317 volts nominal) Johnson Controls Inc., nickel-metal hydride hybrid battery pack. It includes a newly developed proprietary battery management algorithm which broadcasts the battery's state of charge onto the CAN network.