Caracterização e pirólise de arenitos asfálticos oriundos da Formação Pirambóia, Bacia do Paraná: avaliação da viabilidade para produção de óleo

• Autor(a) principal: Medeiros Júnior, Iris
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/15801
• topic: Asphaltic sandstones; hydrocarbons; oil production; piramboia formation; pyrolysis process; pyrolytic oil; tar sands; Arenito asfáltico; formação piramboia; hidrocarbonetos; processo de pirólise; pirolisado; produção de óleo; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA

In this work, some chemical characterizations were held on tar sands in the region of Piracicaba-SP, the South American Piramboia Formation from Paraná basin, to check its oil production potential. For this purpose, samples obtained in the region have undergone through evaluation by thermogravimetry, moisture content, ash content, content of organic material using extraction, pyrolysis process, elemental analysis and fractionation on open chromatography column. By TGA was noted that 500° C almost all-organic material present suffered pyrolysis. Extraction procedure collaborated to achieve the classification of samples regarding the content of organic material, from 4 to 13%, and by levels found at the sample AM06 is considered of high productive potential, the samples AM05, AM08 and AM09 have medium potential, the samples AM01, AM02, AM03 and AM07 have low potential, but still attractive, and the AM04 does not have any potential. By evaluating the atomic relationship between H/C and O/C of the extracts was possible to build up the Van Krevelen diagram and see that some samples are in the final process of diagenesis and other early catagenesis, indicating that they are in the early maturation process. Chromatographic evaluation of the extracts revealed that there were losses of oil by weathering process because it remains mostly high molecular weight compounds on the rocks. The fractionation has shown that samples AM01, AM06 and AM09 have higher free hydrocarbon amount and samples AM06, AM07 and AM09 presented a higher level of oil content. The pyrolysis procedure showed that the samples AM01, AM05, AM06 and AM09 presented greater oil generation potential, pyrolytic oil released from 2 to 8%, and through their evaluation by HRGC and HRGC-MS it was observed that it promotes the release of significant quantities of substances that are lighter than related to the extracts obtained directly in the original samples. In addition, it also promotes a production of homologous series of paraffinic and olefinic hydrocarbons. Comparison of pyrolysis products of sandstones with pyrolysis products of vacuum residue by HRGC-MS allowed to observe that there is similarity between their compositions, which pyrolysis process of vacuum residue generates a homologous series of hydrocarbons between C10 the C32, similar to AM09 s pyrolysis products, however with minor variety of types of hydrocarbons. The pre-evaluation of co-pyrolysis of sandstones with plastic waste has indicated that it is possible to increase the liquid generation, but more study is needed for clear statements. Based on the results of the evaluations it can be concluded that the region has an interesting potential for producing oil using pyrolysis process