CARACTERIZAÇÃO DE MISTURAS DE ÓLEO DIESEL COM ÓLEO DE PINHÃO MANSO PARA ACIONAMENTO DE UM TRATOR AGRÍCOLA/CHARACTERIZATION OF DIESEL OIL BLENDS WITH Jatropha OIL TO POWER A FARM TRACTOR

The aim of this work was to characterize blends of diesel oil (OD) with jatropha oil (OPM) and evaluate the performance of the power output of an agricultural tractor. For characterization of the mixtures the following parameters were analyzed: specific gravity, viscosity, water content, acid index, sulfated ash, and oxidative stability. After analysis, the dynamometer tests indicatedthe performance of the engine fed with blends of OD and OPM, in different proportions. The main conclusions of this work were: only the results of sulfated ash meet the regulations of ANP No. 7, 2008, and the maximum power encountered, 31.93 kW, was observed for the blend of 25% OD and 75% OPM. The change of fuel caused variation in the torque and specific consumption of the tractor and for all mixtures studied the torque reserve was 1.75%, classified as bad.