Experimental Investigation on the Stability of Hydrous Ethanol Gasoline Blends and Emission Products from SI Engine

Abstract

In this study, gasoline–ethanol–water mixtures were tested for stability, at two gasoline compositions (gasohol E10 and commercial gasoline E0) and five additives. Then, Comparative experiments were carried on a port injection gasoline engine fueled with hydrous ethanol gasoline (HE10), ethanol gasoline (E10) and commercial gasoline (E0). The effects of the engine loads and the additions of ethanol and water on exhaust emission (NOx, HC, CO2, CO) were analyzed deeply. The experimental results showed the phase separation temperature of hydrous ethanol gasoline made up by gasohol (E10) is lower than that made up by commercial gasoline by 14oC, at the same ethanol content and the same water content. The use of chemical additives can importantly decrease the phase separation temperature of E25 hydrous ethanol gasoline. The usage of HE10 decreased NOX, HC and CO emissions significantly at 20 N.m, 40 N.m and 60 N.m While CO2 emissions increased for HE10. From the results, it can be decided that HE10 fuel can be considered as a possible alternative fuel for gasoline engine applications.