Aditivação de querosene em diesel S10 B7 e estudo da estabilidade do combustível através de métodos físico-químicos e quimiométricos.

• Autor(a) principal: Araújo, Heloise Oliveira Medeiros de
• Data de Publicação: 2016
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/38372
• topic: Diesel.; Querosene.; Aditivos.; Estabilidade de armazenamento.; FTIR.; PCA.; Storage Stability.; Kerosene.; Additives.; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA

Diesel is the most consumed fuel in Brazil. Often, this petroleum distillate needs to undergo corrections in its physic-chemical properties through the insertion of improvers; however, it is important to evaluate parameters of fuel degradation stability, a determining characteristic of the quality of these products. In this work, it was studied the addition of kerosene to diesel-biodiesel blends using the storage of diesel S10 B7 mixtures with kerosene in different volumetric proportions during sixty days, generating 60 samples. Oxidation stability analysis (PetroOXY method), atmospheric distillation, specific mass at 20 °C, kinematic viscosity at 40 °C, cloud point and Fourier transform infrared spectrometry (FTIR) were used to evaluate the effect of the addition of kerosene on diesel physicochemical properties and aging. Principal Component Analysis (PCA) was applied to the spectrometric data, to extract information about samples composition during storage and to separate them into different classes. The presence of 15% kerosene in blends improved properties such as oxidative stability and crystallization, decreased boiling temperatures, specific mass and viscosity of the blends. FTIR spectra did not show significant differences between the samples with different concentrations of the additive, nor with different days of storage. PCA was able to distinguish, in the PC2 x PC3 scores, two sample classes, those with less than 30 days of storage and those that were stored for longer. In the loadings graphs, PC1 identified as the main difference between the samples the concentration of biodiesel, PC2 distinguished between the diesel bands in the initial mixtures and those related to the substances produced in the oxidation of these hydrocarbons, and PC3 distinguished the characteristic bands of biodiesel from those characteristics of its degradation products.