Métodos de aplicação de fluorescência no estudo de petróleo

Abstract

Brazil is one of the world's largest oil producers, but still lacks technologies and low-cost methods for the immediate characterization of crude oils extracted from Brazilian rigs. With this in mind, the objective of this work was to apply three techniques of linear and nonlinear optics and their efficiency in the differentiation and characterization of non-homogeneous oil samples, and their respective asphaltenes. The samples were taken from four Brazilian rigs and a simplified cold separation procedure was used. For the samples analysis, three photonic techniques were used: Photoluminescence Excitation (PLE), Fluorescence Lifetime Imaging Microscopy (FLIM) and Fluorescence Correlation Spectroscopy (FCS). The obtained results, from the procedure adopted for dilution and separation of the crude oil samples and their constituent asphaltenes were not reliable results in the FLIM and FCS techniques, but we were able to draw differentiable profiles in the results of the PLE technique. From the obtained results analysis and the discussion of the data, it was possible to conclude that the samples study used procedures did not take into account their complexity and there is much to be learned about the fluorescent profiles of crude oils and their fractions constituents.