Avaliação das incertezas associadas à determinação do parâmetro de solubilidade de Hildebrand de petróleos

AUTOR(ES)

Moura, Lyzette Gonçalves Moraes de, Rolemberg, Marlus Pinheiro, Ramos, Antonio Carlos da Silva, Santos, Maria de Fátima Pereira dos, Zilio, Evaldo López

FONTE

Química Nova

DATA DE PUBLICAÇÃO

2011

RESUMO

Asphaltenes are fractions of crude oils that can precipitate and one of the parameters used in the prediction of the conditions in which this phenomenon occurs is the Hildebrand solubility parameter. In this work, it was evaluated the uncertainty propagation in the experimental determination of the solubility parameter of different crude oils, calculated from data of the asphaltenes precipitation by the addition of n-heptane, identified by optical microscopy. It was verified that the solubility parameter of an oil and the associated uncertainty are specific, being recommended that, whenever viable, it is determined parallel both, conferring higher credibility to the results.

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