Combustion and Emission of a DI Diesel Engine Fueled with Oxygenate Additives

This article presents the comparative bench testing results of a direct injection diesel engine when running on diesel that has been treated with Nitromethane (NM) and Nitroethane (NE) and 2- methoxy ethyl ether (MXEE) as oxygenate additives. The purpose of this study is to evaluate the effectiveness of the oxygenate additives as well as to verify their ability to increase energy conversion and reduce brake specific fuel consumption (BSFC) and exhaust emission when fueling the diesel engine with diesel with these additives. These additives blended with diesel fuel, 10% in volume. The experimental study was carried out on ECE R-96 8-modes cycle. The result showed that application of these additives reduces viscosity but increases cetane index. The maximum cetane index resulted with MXEE additive. Brake thermal efficiency (BTE) increased with NM and NE additives and exhaust emission such as smoke reduced to the minimum value 44% with NE. With MXEE the NOx values increase slightly, this value with NM and NE increased significantly

Keywords:

Diesel fuel , Oxygenated additives , Cetane index , Emission reduction