Evaluation of the uncertainties associated to the determination of the Hildebrand solubility parameter of crude oils

Química Nova

Ramos, Antonio Carlos da Silva¹  Centro Universitário Norte do Espírito Santo, São Mateus, Brasil¹  Zilio, Evaldo López¹  Santos, Maria de Fátima Pereira dos¹  Petróleo Brasileiro S.A., Rio de Janeiro, Brasil¹  Moura, Lyzette Gonçalves Moraes de¹  Rolemberg, Marlus Pinheiro¹  Universidade Federal do Maranhão, São Luís, Brasil¹ 

关键词: asphaltenes;    Hildebrand solubility parameter;    uncertainty propagation.;   

DOI  :  10.1590/S0100-40422011000200011

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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.

【 授权许可】

Unknown