SEDL / STP / STP1477-EB / STP49358S

The Influence of the Addition of Oils in the Diesel Fuel Density

Santo Filho, Dalni Malta do Espirito
Inmetro, Duque de Caxias, Rio de Janeiro,

De Abreu, Fernando Luiz Barbuda
Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (Inmetro)Univ. Federal Fluminense/PGMEC-UFF, Duque de Caxias, Rio de JaneiroRio de Janeiro,

Pereira, Roberto Guimarães
Univ. Federal Fluminense/PGMEC-UFF/TEM/MSG, Rio de Janeiro,

dos Santos Júnior, José Júlio Pinheiro
Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (Inmetro), Rio de Janeiro,

Siqueira, José Renato Real
Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (Inmetro), Rio de Janeiro,

Ferreira, Paulo Lyra Sim ões
Eng., Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (Inmetro), Rio de Janeiro,

Barbosa, Thales de Paula
Technician, Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (Inmetro), Rio de Janeiro,

Lima, Leandro Santos
Technician, Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (Inmetro), Rio de Janeiro,

Baldner, Felipe de Oliveira
Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (Inmetro), Rio de Janeiro,

Pages: 14    Published: Jan 2011

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Abstract

The world is looking for changes in its energetic matrix through the use of biofuels to reduce the dependence on oil derivatives. Currently, the number of studies concerning mixtures of triglycerides from animals or plants with diesel fuel has risen due to efforts to reduce the consumption of diesel oil. This paper studies the behavior of the density of plant oils mixed with diesel fuel in relation to temperature, which is essential to guarantee engine efficiency. The density is related to the mass and to the volume being a critical property to the assessment of the subministered energy to the engine by the injection system, which behaves like a pump of positive displacement. Samples of the diesel fuel mixture were made with plant triglycerides in proportion and range of ∼5–20%. The densities of the samples were measured in a density meter with temperature varying between 18 and 25°C, as well as at 15°C, according to ASTM standard. Afterwards, the uncertainties of measurement were calculated, and the density change with respect to temperature is presented and shown in density variation curves. An analysis of the density variation curves shows that.