Agosto 2024 vol. 11 num. 1 - XXXI Simpósio Internacional de Engenharia Automotiva

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Efeito do HVO e do biodiesel na estabilidade à oxidação e nas propriedades de escoamento de misturas de óleo diesel

Effect of HVO and biodiesel on oxidation stability and flow properties of diesel fuel blends

SOUZA, V.M.G. ; D AVILA, L. A. ;

Trabalho completo:

Devido a problemas de campo, a estabilidade à oxidação de misturas de óleo diesel precisa ser abordada. HVO, três amostras de biodiesel (Bios 1, 2 e 3) e um óleo diesel S10 foram utilizados para se gerar formulações B10, B15, B20 e B10R5 (10% biodiesel e 5% HVO). Os combustíveis foram envelhecidos a 43 °C por 15 semanas, e frascos dedicados foram analisados pelo menos mensalmente, considerando-se os períodos de indução de Rancimat e PetroOxy, o número de hidroperóxidos, a formação de material insolúvel, viscosidade e o FBT. MANOVA, HCA e ACP indicaram que o aumento no teor de biodiesel levou à redução dos períodos de indução e ao aumento do número de hidroperóxidos, material insolúvel e FBT, diminuindo a estabilidade. A adição de HVO manteve as propriedades do B10 para o B10R5, demonstrando que o aumento no conteúdo renovável ocorreu sem inconvenientes, como esperado pelo seu perfil saturado de hidrocarbonetos. Todavia, os B15 tiveram desempenho inferior, confirmando que a piora observada foi em função das insaturações do biodiesel. Do ponto de vista do biodiesel, o Bio 2, produzido a partir de óleo de soja, sebo e outras fontes, foi menos sujeito à oxidação devido à sua maior saturação e menor proporção de hidrogênio lábil, tornando as formulações com Bio 2 mais estáveis.

Trabalho completo:

Due to field problems, the oxidation stability of diesel fuel blends needs to be addressed. HVO, three biodiesel samples (Bios 1, 2, and 3), and one S10 diesel fuel produced B10, B15, B20, and B10R5 (10 % biodiesel and 5 % HVO) formulations. Fuels were aged under standardized procedure at 43 °C for 15 weeks, and dedicated flasks were analyzed at least every four weeks, considering Rancimat and PetroOxy induction periods, hydroperoxide number, insoluble material formation, viscosity, and FBT. MANOVA, HCA, and PCA indicated that the increment in the biodiesel proportion led to a reduction in the induction periods and a rise in hydroperoxide number, insoluble material, and FBT, lowering the oxidation stability. Adding HVO maintained the stability and flow features of B10 to B10R5, demonstrating an increase in renewables without drawbacks, as expected by its saturated hydrocarbon profile. On the other hand, the B15 formulations had lower performance, confirming that the worsening observed must be due to unsaturations in the biodiesel. From a biodiesel perspective, Bio 2, produced from a mixture of soybean oil, tallow, and minor sources, was less prone to oxidation due to its higher saturation and lower proportion of labile hydrogen, making formulations with Bio 2 more stable.

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DOI: 10.5151/simea2024-PAP88

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Como citar:

SOUZA, V.M.G.; D AVILA, L. A.; "Efeito do HVO e do biodiesel na estabilidade à oxidação e nas propriedades de escoamento de misturas de óleo diesel", p. 473-480 . In: Anais do XXXI Simpósio Internacional de Engenharia Automotiva . São Paulo: Blucher, 2024.
ISSN 2357-7592, DOI 10.5151/simea2024-PAP88

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