Changes in thermal properties of crude oil asphaltenes induced by NaOH treatment

Karacan, Ozgen
Kök, Mustafa Verşan
Karaaslan, Ugur
In this study, an asphaltic Turkish crude oil was treated with alkali solution (NaOH) at different concentrations to simulate an alkali EOR technique. IFT (interfacial tension) measurements were carried out by ring method and the yields of asphaltene is precipitated after the process. Thermal properties of these asphaltenes were investigated by thermal analysis methods (thermogravimetry, TG/DTG and differential scanning calorimeter, DSC) to infer the possible changes in the asphaltene molecules and their behavior during refinery or fuel purposes. (C) 1999 Elsevier Science B.V. All rights reserved.