INFLUÊNCIA DA TEMPERATURA E DE MATERIAIS PARTICULADOS NA PRECIPITAÇÃO DOS ASFALTENOS

Abstract

The oil´s behavior s study, mainly the hard fractions, including asphaltenes and resins, have became extremely important, since the relations between theses constituents during the oil mixing operations and its derivatives may bring several problems with the asphaltenes precipitance. Undesirable, the precipitance may cause pipe s obstruction during the oil s extraction, slowing down the production and rising up the expenses. These facts have motivated this work, that seek determine the influence of temperature and adding particulate materials, in the beginning of asphaltenes precipitation (IP) in models solutions, intending in better characterize the precipitation process, once many of the models applied to determinate the stability and compatibility between these oils, for example, are based on data from the beginning of the precipitation (IP). The technique spectroscopy near Infrared was used to determine the precipitation of asphaltenes in the temperature range from 10 to 30 ºC and with different particle materials (calcareous, sandstone, clay) and a optical microscopy technique determining IP with no temperature variations, contributing as basis for the obtained value, using the NIR technique. The results will designate the temperature variation, with little influences on precipitation, according to the literature. Particle adding (calcareous and clay) have proved to be significant, modifying significantly the asphaltenes precipitation outset, however, the same thing hasn t been noticed with the sandstone particles.