Resumo

VELAZQUEZ, E; DULLAK, A  e  DUARTE, S. Conventional disused tire pyrolysis for the production of liquid fuels. Rev. ciente. UCSA [online]. 2016, vol.3, n.2, pp.25-32. ISSN 2409-8752.  https://doi.org/10.18004/ucsa/2409-8752/2016.003(02)025-032.

Characteristics of the liquid product obtained from waste tire pyrolysis were assessed after 40 minutes of isothermal pyrolysis. The process was carried out in conditions ranging 450 to 550 °C, 10 to 20 °C/min and 1 to 3 mm particle size, according to a 2^3 factorial design with center point runs. The regression model indicates that, within a confidence interval of 95%, the heating rate and its interactions have no statistically significant effect in the liquid product yield, within the search space of the experiment. The liquid product's density, viscosity, flash point, cetane index, and heating value resemble those of diesel fuel. Nonetheless it needs previous refinement to reduce its sulfur content, a hundred times larger than the specified in Paraguayan standards, prior to its use in modern diesel engines. Additionally, the solid product's characteristics resemble those of anthracite, with a higher heating value of 29.3 MJ/kg.

Palavras-chave : pyrolysis; fuels; waste tires; factorial design; mathematical model.

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