Looking for a Model Solvent to Disperse Asphaltenes

Maria Garreto1, Gaspar Gonzalez2, Antonio Ramos3 and Elizabete Lucas1
1Federal University of Rio de Janeiro – Macromolecules Institute – Av. Horacio Macedo, 2030 – Ilha do Fundao, 21941-598, Rio de Janeiro, RJ, Brazil 2Petrobras Research Center, Av. Horacio Macedo, 950 - Cidade Universitaria; 21941-915, Rio de Janeiro, RJ, Brazil 3Federal University of Maranhao – Department of Chemical Technology, Av. dos Portugueses s/n – Campus Universitario do Bacanga, 65085-040 - Sao Luis, MA, Brazil
PDF icon full_text.pdf170.03 KB
Petroleum could be seen as a system of asphaltenes dispersed in other petroleum components. The petroleum components excluding the asphaltenes are referred to in this paper as Petroleum Medium that Disperses the Asphaltenes – PMDA). This paper proposes a methodology to determine solubility parameter of the PMDA by identifying a model solvent which, when added to the petroleum, does not affect the asphaltenes phase behavior. In order to achieve such objective the asphaltenes precipitation onset (PO) of the petroleum was determined, followed by the identification of a solvent mixture which, when added to the petroleum, does not change the PO. The solubility parameter () of the PMDA was assumed equal to the solubility parameter of the identified solvent mixture.

[1] Lucas E., Mansur C., Spinelli L. and Queiros Y.: Pure Appl. Chem., 2009, 81, 473.

[2] Moreira L., Gonzalez G. and Lucas E.: Polimeros Ciencia e Tecnologia, 1998, 8, 46.

[3] Storm D., Sheu E., Detar M. and Barresi R.: Energy & Fuels, 1994, 8, 567.

[4] Goncalves J., Castillo J., Fernandez A. and Hung J.: Fuel, 2004, 83, 1823.

[5] Spiecker M., Keith L. and Gawrys P.: J. Colloid Interface Sci., 2003, 267, 178.

[6] Khristov K., Taylor S., Czarnecki J. and Masliyah J.: Colloids & Surfaces, 2000; 174, 183.

[7] Middea A, Monte M. and Lucas E.: Chem. & Chem. Techn., 2008, 2, 91.

[8] Zahedi G., Fazlali A., Hosseini S. et al.: J. Petrol. Sci. Eng., 2009, 68, 218.

[9] Levin M. and Redelius P.: Energy Fuels, 2008, 22, 3395.

[10] Pazuki G. and Nikookar M.: Fuel, 2006, 85, 1083.

[11] Mofidi A. and Edalat M.: Fuel, 2006, 85, 2616.

[12] Mutelet F., Ekulu G., Solimando R. and Rogalski M.: Energy & Fuels, 2004, 18, 667.

[13] Gonzalez G., Souza M. and Lucas E.: Energy & Fuels, 2006, 20, 2544.

[14] Carbonezi C., Almeida L., Araujo B. et al.: Energy & Fuels, 2009, 23, 1249.

[15] Rogel E., Leon O., Torres G. and Espidel J.: Fuel, 2000, 79, 389.

[16] Souza M., Oliveira G., Lucas E. and Gonzalez G.: Prog. in Colloid Polym. Sci., 2004, 128, 283.

[17] Burke J.: The Am. Inst. for Conservation, 1984, 13, 13.

[18] Fossen M., Kallevik H., Knudsen K. and Sjoblom J.: Energy & Fuels, 2004, 21, 1030.

[19] Kyeongseok O., Ring T. and Deo M.: J. Colloid Interface Sci., 2004, 271, 212.