The need to reduce fossil fuel dependency and the stringent legislations on environmental and greenhouse gas emissions from diesel engines are the main drivers for researchers in the study of alternative combustion modes and non-conventional fuel sources. In the field of second generation biofuels, ethanol is receiving considerable attention as a valid alternative to fossil oils in internal combustion engines thanks to its storage facility, availability and handling. The most common use of ethanol is for gasoline engine applications, but the interest in burning ethanol in diesel engine is increasing [1]. Like other oxygenated biofuels, ethanol can significantly contribute to the particulate emission reduction, thus appearing very interesting for soot critical conditions, like diesel engine high/full load operations [2,3]. Several methods and systems have been examined in order to evaluate the applicability of ethanol in compression ignition engines; these include dual fuel (DF) injection systems [2,4] and direct injection of alcohol-diesel fuel emulsions or blends. In DF configuration, the port fuel injection (PFI) of ethanol is coupled with the direct injection (DI) of the conventional diesel fuel [2]. Despite many advances the exploiting of the full potential of the DF approach, still requires research efforts. This study aimed to characterize the impact of the dual-fuel ethanol-diesel combustion system on size, number, morphology, reactivity and chemical features of the emitted carbonaceous particles [5]. These aspects are relevant on the design and management of the engine-DPF system of a potential DF ethanol-diesel engine.
The impact of the dual-fuel ethanol-diesel combustion system on size, number, morphology, and chemical features of the emitted soot
M Alfe';V Gargiulo;G Di Blasio;C Beatrice
2015
Abstract
The need to reduce fossil fuel dependency and the stringent legislations on environmental and greenhouse gas emissions from diesel engines are the main drivers for researchers in the study of alternative combustion modes and non-conventional fuel sources. In the field of second generation biofuels, ethanol is receiving considerable attention as a valid alternative to fossil oils in internal combustion engines thanks to its storage facility, availability and handling. The most common use of ethanol is for gasoline engine applications, but the interest in burning ethanol in diesel engine is increasing [1]. Like other oxygenated biofuels, ethanol can significantly contribute to the particulate emission reduction, thus appearing very interesting for soot critical conditions, like diesel engine high/full load operations [2,3]. Several methods and systems have been examined in order to evaluate the applicability of ethanol in compression ignition engines; these include dual fuel (DF) injection systems [2,4] and direct injection of alcohol-diesel fuel emulsions or blends. In DF configuration, the port fuel injection (PFI) of ethanol is coupled with the direct injection (DI) of the conventional diesel fuel [2]. Despite many advances the exploiting of the full potential of the DF approach, still requires research efforts. This study aimed to characterize the impact of the dual-fuel ethanol-diesel combustion system on size, number, morphology, reactivity and chemical features of the emitted carbonaceous particles [5]. These aspects are relevant on the design and management of the engine-DPF system of a potential DF ethanol-diesel engine.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
