title: Rapid assessment of total and polycyclic aromatic contents in heavy oils.
abstract: The monitoring of the content of polycyclic aromatic hydrocarbons (PAHs) is important for evaluating heavy oil products, especially those most likely to cause environmental impacts. In this study, a comparison between samples of heavy petroleum fractions, using different methods, was carried out. The calculation of carbon distribution and polycyclic aromatic contents was compared with other methods using Fourier transform infrared spectroscopy (FTIR). Therefore, it was possible to quickly estimate the aromatic content by the FTIR method, and the results showed consistency with those obtained through traditional methods. A rapid method, using extraction with dimethyl sulfoxide followed by FTIR measurements, was proposed and shown as particularly useful and reliable for a quick quantification of the PAH content, when compared to the traditional IP 346 method. Furthermore, the difference in total aromatic and PAH concentrations may be more clearly established. This rapid method may be used for the evaluation of PAH content in samples obtained from studies for their removal from complex heavy oil fractions.
authors.affiliation: Departamento de Engenharia Química, Grupo de Pesquisa em Separações por Adsorção-GPSA, Universidade Federal do Ceará, Campus do Pici, 709, Fortaleza, CE, 60.455-900, Brasil.
authors.forename: F Murilo T
authors.initials: FM
authors.lastname: Luna
authors.affiliation: Departamento de Engenharia Química, Grupo de Pesquisa em Separações por Adsorção-GPSA, Universidade Federal do Ceará, Campus do Pici, 709, Fortaleza, CE, 60.455-900, Brasil.
authors.forename: Antonio A
authors.initials: AA
authors.lastname: Pontes Filho
authors.affiliation: Petrobras/Cenpes, Ilha do Fundão, Rio de Janeiro, RJ, 21.949-900, Brasil.
authors.forename: Eduardo D
authors.initials: ED
authors.lastname: Trindade
authors.affiliation: Departamento de Engenharia Química, Grupo de Pesquisa em Separações por Adsorção-GPSA, Universidade Federal do Ceará, Campus do Pici, 709, Fortaleza, CE, 60.455-900, Brasil. celio@gpsa.ufc.br.
authors.forename: Celio L
authors.initials: CL
authors.lastname: Cavalcante
mesh_terms: D002244:Carbon; D004784:Environmental Monitoring / Q000379:methods*; D009821:Oils / Q000737:chemistry; D010578:Petroleum / Q000032:analysis*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*
chemical_list: D009821:Oils; D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons; D002244:Carbon
keywords: Carbon distribution; FTIR; Heavy oils; Polycyclic aromatic hydrocarbons