Mixtures of bioethanol and gasoline as a fuel for SI engines

Abstract

The importance of alternative fuels, especially bioethanol and biodiesel, rises due to the limited oil sources, secure supply, prices changes, and environment pollution. Bioethanol is an alternative fuel which will be important in future, as a fuel produced from different crops and lignocelluloses materials. The quality of bioethanol has significant influence on the characteristics of mixtures with gasoline and engine performance. The investigations were performed with the bioethanol obtained as by-product from sugar industry, which is not denaturated and produced according the requests prescribed by standards for ethanol used in mixtures with gasoline. Main target was to examine the possibility of utilisation of bioethanol obtained as by-product and without additional technologies for purification and additional costs. The results of standard and non-standard investigations and engine tests of bioethanol and gasoline mixtures are presented.

An experimental study of the combusition and emission performances of 2,5-dimethylfuran diesel blends on a diesel engine

“…In particular, this search is highly significant in terms of the internal combustion engine (ICE) for approximately 60% of fossil fuels are consumed by transportation. According to current research, biofuels, such as ethanol [3,4], methanol [5,6], biodiesel [7,8], and n-butanol [9,10], have shown great potential to meet these challenges.…”

A review of emission products from bioethanol and its blends with gasoline. Background for new guidelines for emission control

“…A third study involving measurements of these emissions products reports that CO, CO 2 and NOx are all reduced by blending gasoline with bioethanol; CO is reduced by 20-30% for both low-and high-level blends, CO 2 is drastically decreased when bioethanol part is increased towards high-level blends (E85), while NOx decreases from 5% to 20% when blending from E10 to E85 [59]. A recent Serbian study on bioethanol-gasoline blends shows that CO emissions decrease at low-level blends (E1-E3), also compared to pure gasoline, and that HC content interestingly increases abruptly for E1 blends on idle driving compared to 100% gasoline, while E2 and E3 decrease HC content, during idling, low and high number of running revolutions [60]. The advantage of E1 blends is in that they do not require additional stabilizers, while blends from E2 and upward require stabilizers of the blends [60].…”

“…A recent Serbian study on bioethanol-gasoline blends shows that CO emissions decrease at low-level blends (E1-E3), also compared to pure gasoline, and that HC content interestingly increases abruptly for E1 blends on idle driving compared to 100% gasoline, while E2 and E3 decrease HC content, during idling, low and high number of running revolutions [60]. The advantage of E1 blends is in that they do not require additional stabilizers, while blends from E2 and upward require stabilizers of the blends [60]. The reason for the large difference in emissions between E1 and the two other blends may nevertheless be attributed to the missing effect of removing phase-separation in the fuels, and thus a potentially lower ignition boundary of the E1 fuel compared to E2 and E3.…”

A comprehensive numerical study of the ethanol blended fuel effect on the performance and pollutant emissions in spark-ignition engine

“…Stojiljkovi} et al [9] studied the effect of bioethanol-gasoline blends on performance and pollutant emission. It was observed that the maximum values of engine power, torque, and specific fuel consumption are approximately identical with pure gasoline.…”