APPROXIMATION OF INTERFACIAL TENSION FOR ASPHALTENIC CRUDE OIL AND C02 USING PARACHOR METHOD

In this study, new way to handle the determination of interfacial tension for asphaltenic
crude oil and C02 using parachor method is proposed. Parachor is one empirical
method that can be use to predict interfacial tension and is widely used in the industry.
Parachor method is dependent on the phase density, molecular weight, parachor value
for each components and the scaling exponent. Early studies defined the value of the
scaling exponent to be 3.67, 3.88,3.91 and 4.00. However, these proposed values are not
design to predict the 1FT for crude oil that contain asphaltenes more than 0.01%. As a
result, the predicted 1FT gave an error when comparing the results with the laboratory
determination. This paper used four types of asphaltenic crude oil that contain different
percentage of asphalt. The samples are Dulang Crude Oil, Iraq Ratawi Crude Oil, and
mixture of 80% Dulang Crude and 20% Iraq Ratawi Crude, and 20% Dulang Crude and
80% Iraq Ratawi Crude. To compare the empirical method, this project implemented
1FT pendant drop experiment as the main laboratory work. This paper compared the 1FT
value from the experiment and the empirical method in order to come up with a method
to encounter the error.