Performance evaluation of a four-stroke engine powered by biofuel blends made from waste olives of Sfax region

Abstract

Biofuel as an alternative fuel might be a future option to satisfy fossil fuel scarcity while also lowering pollution emissions from internal combustion engines. The purpose of this study is to evaluate the impact of employing diesel-biofuel mixes on the performance and emissions of a single-cylinder direct-injection engine, both experimentally and statistically. The use of waste oil derived from olive trees in Tunisia's Sfax area is presented in this study. To make biofuel from recycled olive oil, a chemical transesterification procedure was performed. A single-cylinder engine test facility was used to create and test six mixes of varied amounts of diesel and biofuel. In terms of exhaust emissions and torque, the experimental findings were compared to those of a one-dimensional engine model, which revealed a good agreement between test and numerical data. Furthermore, the engine's thermodynamics characteristics for various blends were provided in order to better understand the elements that influence the engine's response to changes in fuel composition.