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BIODIESEL PRESENCE EFFECT ON THE THERMAL AND THERMO-OXIDATIVE STABILITY OF ITS BLENDS WITH DIESEL OIL

BIODIESEL PRESENCE EFFECT ON THE THERMAL AND THERMO-OXIDATIVE STABILITY OF ITS BLENDS WITH DIESEL OIL

OLIVEIRA, Tatiana Fernandes de; DWECK, Jo;

Artigo Completo:

Nowadays in Brazil the biodiesel commercialization has to comply with Law #13.263, of March 23rd, 2016, which establishes in 7 vol%, the minimum mandatory percentage of addition to diesel oil. This law also indicates that in the future, this percentage will tend up to 20% (B20). The main objective of this research is to analyze the effects of the presence of biodiesel on the thermal and thermo-oxidative stability temperatures of its blends with diesel oil, as well as on their ignition temperatures. This evaluation of alternative fuels for diesel engines was done using thermogravimetry (TG), derived thermogravimetry (DTG) and differential thermal analysis (DTA). The thermal stability was determined by the extrapolated onset temperature of the TG loss (onset temperature) in a nitrogen environment. The thermo-oxidative stability was determined in two ways: the first by the onset temperature of loss of mass in the TG curve in air and the second, by the onset of the oxidation in liquid phase given by the onset temperature of the first peak of DTA curve, from which, the auto-ignition temperature was also determined. The results indicate that the increase in biodiesel content influences directly the ignition delay of the blends, which occurs during analysis. The thermal and thermooxidative stability temperatures of the blends increase linearly with the added content of biodiesel indicating that heavier products are being formed by oxidation, which may cause problems in the diesel circulation and engine efficiency Keywords: blends biodiesel/diesel , thermal stability, thermoxidative stability, ignition temperature.

Artigo Completo:

Nowadays in Brazil the biodiesel commercialization has to comply with Law #13.263, of March 23rd, 2016, which establishes in 7 vol%, the minimum mandatory percentage of addition to diesel oil. This law also indicates that in the future, this percentage will tend up to 20% (B20). The main objective of this research is to analyze the effects of the presence of biodiesel on the thermal and thermo-oxidative stability temperatures of its blends with diesel oil, as well as on their ignition temperatures. This evaluation of alternative fuels for diesel engines was done using thermogravimetry (TG), derived thermogravimetry (DTG) and differential thermal analysis (DTA). The thermal stability was determined by the extrapolated onset temperature of the TG loss (onset temperature) in a nitrogen environment. The thermo-oxidative stability was determined in two ways: the first by the onset temperature of loss of mass in the TG curve in air and the second, by the onset of the oxidation in liquid phase given by the onset temperature of the first peak of DTA curve, from which, the auto-ignition temperature was also determined. The results indicate that the increase in biodiesel content influences directly the ignition delay of the blends, which occurs during analysis. The thermal and thermooxidative stability temperatures of the blends increase linearly with the added content of biodiesel indicating that heavier products are being formed by oxidation, which may cause problems in the diesel circulation and engine efficiency Keywords: blends biodiesel/diesel , thermal stability, thermoxidative stability, ignition temperature.

Palavras-chave: biodiesel,

Palavras-chave:

DOI: 10.5151/engpro-simea2017-53

Referências bibliográficas
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Como citar:

OLIVEIRA, Tatiana Fernandes de; DWECK, Jo; "BIODIESEL PRESENCE EFFECT ON THE THERMAL AND THERMO-OXIDATIVE STABILITY OF ITS BLENDS WITH DIESEL OIL", p. 712-723 . In: . São Paulo: Blucher, 2017.
ISSN 2357-7592, DOI 10.5151/engpro-simea2017-53

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