Welcome to the National Transport Library Catalogue

Normal view MARC view

Blending of ethanol in gasoline for spark ignition engines : Problem inventory and evaporative measurements Egebäck, Karl-Erik et al

By: Series: Publication details: Haninge AVL MTC Motortestcenter AB, 2005; MTC 5407, Description: 104 s. + bilSubject(s): Online resources: Abstract: Presently all gasoline sold in Sweden contain 5 % of ethanol. Ethanol mixing above 5% is not possible because of the EU-fuel directive as well as The European standard EN 228. However, there is in Sweden an interest in further increasing the bio-ethanol content in gasoline up to at least 10 %. The main reason is that even relatively small percentage additions will result in a substantial total volume of gasoline substitution, and the present infrastructure for distributing fuels can be used largely unchanged. Based on that background the purposes of the study were to collect information on national and international findings and experience related to the use of blends of ethanol in gasoline as fuels in spark ignition engines. The project also included a first study on the impact of the evaporative emissions with different grades of base gasoline and different blending proportions of ethanol. The main conclusion from using ethanol-gasoline blends in practice is that blends with up to 15 percent ethanol will not have any significant negative effects on the wear of the engine or vehicle performance. No significant difference can be seen in regulated emissions when comparing the use of blended fuel (with up to 10-15% ethanol) to the use of neat gasoline. Concerning unregulated emissions views differ. Regarding the emissions of benzene, toluene, ethyl benzene and xylene (BTEX) the main conclusion is that there is a slight decrease when using ethanol blends, while for aldehydes there is a significant increase, especially of acetaldehyde and (to a lesser extent) formaldehyde emissions. However, there is a serious lack of data describing the effects under Swedish conditions. There will be a slight increase (~2-3%) in fuel consumption when shifting from neat gasoline to a 10 percent ethanol-gasoline blend, depending on the design of the vehicle. Cold starts, in particular, will affect fuel consumption more when using blended gasoline than when using neat gasoline. There is a need to generate data and experience by running tests and analysing the environmental effects of blending ethanol with gasoline. The lack of data is more marked for blends with high ethanol contents (~20 %). Such blends should be avoided before a thorough analysis has been carried out and more data are available.
Item type: Reports, conferences, monographs
No physical items for this record

Presently all gasoline sold in Sweden contain 5 % of ethanol. Ethanol mixing above 5% is not possible because of the EU-fuel directive as well as The European standard EN 228. However, there is in Sweden an interest in further increasing the bio-ethanol content in gasoline up to at least 10 %. The main reason is that even relatively small percentage additions will result in a substantial total volume of gasoline substitution, and the present infrastructure for distributing fuels can be used largely unchanged. Based on that background the purposes of the study were to collect information on national and international findings and experience related to the use of blends of ethanol in gasoline as fuels in spark ignition engines. The project also included a first study on the impact of the evaporative emissions with different grades of base gasoline and different blending proportions of ethanol. The main conclusion from using ethanol-gasoline blends in practice is that blends with up to 15 percent ethanol will not have any significant negative effects on the wear of the engine or vehicle performance. No significant difference can be seen in regulated emissions when comparing the use of blended fuel (with up to 10-15% ethanol) to the use of neat gasoline. Concerning unregulated emissions views differ. Regarding the emissions of benzene, toluene, ethyl benzene and xylene (BTEX) the main conclusion is that there is a slight decrease when using ethanol blends, while for aldehydes there is a significant increase, especially of acetaldehyde and (to a lesser extent) formaldehyde emissions. However, there is a serious lack of data describing the effects under Swedish conditions. There will be a slight increase (~2-3%) in fuel consumption when shifting from neat gasoline to a 10 percent ethanol-gasoline blend, depending on the design of the vehicle. Cold starts, in particular, will affect fuel consumption more when using blended gasoline than when using neat gasoline. There is a need to generate data and experience by running tests and analysing the environmental effects of blending ethanol with gasoline. The lack of data is more marked for blends with high ethanol contents (~20 %). Such blends should be avoided before a thorough analysis has been carried out and more data are available.

Powered by Koha