Colloidal Analysis of the Asphaltene and Their Fractions With p-Nitrophenol (PNP) of the Furrial Crude Oil for Effect of the Hydrotreating to Different Pressures (ABSTRACT)

摘要

In this work, the effect of the hydrotreating (HDT) to the Furrial crude oil on the asphaltene and their fractions A1 and A2 obtained by the p-Nitrophenol (PNP) method [1] was studied. Eight HDT reactions were carried out to the Furrial crude oil using a batch reactor, to different pressures of hydrogen (70, 85, 100 and 120 bar). After the reactions, it was separate the asphaltene of the crude oil, which was fractioned with PNP being obtained A1 and A2. The asphaltene and their fractions were characterized for: flocculation threshold, percentage (% ) of total sulfur, nuclear magnetic resonance of 13C and elemental composition. With the results obtained it was found that the HDT affected, the colloidal behavior of the asphaltene, it was determined that the presence of the catalyst-favored the conversion of the asphaltene, its stability, and its desulfuration, the relationship Caliphatic/Caromatic what suggests increased that the process of HDS you takes for two mechanism, above the 100 bar the stability is not favored of the asphaltene, giving us that the interval of pressure is between 80 and 100 bar, under the reaction conditions. The HDT affected in more proportion the fraction A2 than At indicating us that the fraction is susceptible to the reactions of HDT, due that is in the periphery and the A1 it is located in the pith[2] being the less reactive one. The percentage of total S indicate that the fraction A1 should be more poliaromatic, and with the percentages m/m of the fractions of PNP it was found that the fraction A1 always had the biggest value.