| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 227967 | Journal of Industrial and Engineering Chemistry | 2016 | 9 Pages |
•Dynamic interfacial tensions (DIFT) of two crude oil/deionized water are measured.•The impacts of crude oil type, pressure and temperature on the DIFT are investigated.•DIFT are modeled based on the mono-exponential decay and dynamic adsorption models.•Adsorption, equilibrium, and meso-equilibrium times are obtained.•Surface excess concentration of natural surfactant at the interface is also calculated.
This study investigates dynamic interfacial tension (DIFT) of acidic crude oil (ACO) and non acidic/basic crude oils (BCO) + deionized water (DW) as a function of pressure from 500 to 4000 psi, and temperature from 30 to 80 °C using an axisymmetric drop shape analysis (ADSA) technique. DIFTs are also modeled using dynamic adsorption model, mono-exponential decay model, and empirical equations. The results showed that if a reduction in the surface excess concentration due to increasing temperature overlooks the total entropy of the molecules in the system, an increase in IFT would be expected.
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