Test run evaluation of a blend of fuel-grade ethanol and regular commercial gasoline: its effect on engine efficiency and exhaust gas composition

Roayaei, Emad; Taheri, Kamran

doi:10.1007/s10098-009-0206-7

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…The effects of using biomass fuels and bioethanol and biodiesel blends on tailpipe emissions have been examined by numerous authors with varying results (Schifter et al, 2004(Schifter et al, , 2011Niven, 2005;Coelho et al, 2006;Fernando et al, 2006;Goldemberg et al, 2008;Graham et al, 2008;Pang et al, 2008;Coronado et al, 2009;Costa and Sodré, 2009;Demirbas, 2009;Hilton and Duddy, 2009;Roayaei and Taheri, 2009;Yanowitz and McCormick, 2009;Yoon et al, 2009;Zhai et al, 2009;Park et al, 2010). Fuel blends, combustion and ambient temperatures as well as additives play a decisive role in air pollutant formation (Lucon et al, 2005;Coelho et al, 2006;Graham et al, 2008;Ginnebaugh et al, 2010).…”

Section: Srren 43 Of 135 Chaptermentioning

confidence: 99%

Renewable Energy in the Context of Sustainable Development

Sathaye¹,

Lucon²,

Rahman³

et al. 2011

Renewable Energy Sources and Climate Change Mitigation

102

107

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Section: Srren 43 Of 135 Chaptermentioning

confidence: 99%

Renewable Energy in the Context of Sustainable Development

Sathaye¹,

Lucon²,

Rahman³

et al. 2011

Renewable Energy Sources and Climate Change Mitigation

102

107

View full text Add to dashboard Cite

“…We determine the vehicle efficiency effect of ethanol by compiling paired energy efficiency data from all known studies of existing SI-engine vehicles operating on ethanol/gasoline blends and pure gasoline. − The statistical analysis is based on those studies that tested both ethanol/gasoline blends (with nominal ethanol volume no less than 5%) and gasoline on the same vehicle models under comparable real-world driving conditions or over the same standard drive cycles on a dynamometer, excluding tests on fuel/vehicle combinations that are not in actual use (e.g., regular gasoline vehicles on blends higher than E20). Tests under different controlled conditions (e.g., different ambient temperatures and accumulated vehicle mileages) and on fuels of different targeted properties (e.g., distillation characteristics and vapor pressures) were considered individually.…”

Section: Methodsmentioning

confidence: 99%

Effects of Ethanol on Vehicle Energy Efficiency and Implications on Ethanol Life-Cycle Greenhouse Gas Analysis

Yan

Inderwildi

King

et al. 2013

Environ. Sci. Technol.

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Bioethanol is the world's largest-produced alternative to petroleum-derived transportation fuels due to its compatibility within existing spark-ignition engines and its relatively mature production technology. Despite its success, questions remain over the greenhouse gas (GHG) implications of fuel ethanol use with many studies showing significant impacts of differences in land use, feedstock, and refinery operation. While most efforts to quantify life-cycle GHG impacts have focused on the production stage, a few recent studies have acknowledged the effect of ethanol on engine performance and incorporated these effects into the fuel life cycle. These studies have broadly asserted that vehicle efficiency increases with ethanol use to justify reducing the GHG impact of ethanol. These results seem to conflict with the general notion that ethanol decreases the fuel efficiency (or increases the fuel consumption) of vehicles due to the lower volumetric energy content of ethanol when compared to gasoline. Here we argue that due to the increased emphasis on alternative fuels with drastically differing energy densities, vehicle efficiency should be evaluated based on energy rather than volume. When done so, we show that efficiency of existing vehicles can be affected by ethanol content, but these impacts can serve to have both positive and negative effects and are highly uncertain (ranging from -15% to +24%). As a result, uncertainties in the net GHG effect of ethanol, particularly when used in a low-level blend with gasoline, are considerably larger than previously estimated (standard deviations increase by >10% and >200% when used in high and low blends, respectively). Technical options exist to improve vehicle efficiency through smarter use of ethanol though changes to the vehicle fleets and fuel infrastructure would be required. Future biofuel policies should promote synergies between the vehicle and fuel industries in order to maximize the society-wise benefits or minimize the risks of adverse impacts of ethanol.

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Comparing the Social Costs of Biofuels and Fossil Fuels: A Case Study of Vietnam

Thanh

2015

Cost-Benefit Studies of Natural Resource Management in Southeast Asia

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Test run evaluation of a blend of fuel-grade ethanol and regular commercial gasoline: its effect on engine efficiency and exhaust gas composition

Cited by 7 publications

References 3 publications

Renewable Energy in the Context of Sustainable Development

Renewable Energy in the Context of Sustainable Development

Effects of Ethanol on Vehicle Energy Efficiency and Implications on Ethanol Life-Cycle Greenhouse Gas Analysis

Comparing the Social Costs of Biofuels and Fossil Fuels: A Case Study of Vietnam

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