Thermodynamic Analysis of Adsorption of a Naturally Derived Surfactant onto Shale Sandstone Reservoirs

Mohammadali Ahmadi


Adsorption is an exothermic procedure; an increasing in the temperature reduces an adsorption rate. Adsorption factors for the Freundlich, Langmuir, Temkin, and Linear isotherms were extracted by using experimental data. The Freundlich isotherm model statistically performed the most compatibility with the laboratory equilibrium data, R2 = 0.99317.  Designing a surfactant flooding method based on the Zyziphus Spina Christi seems viable economically because the raw mentioned material is low cost and locally available in the Middle Eastern oil-producing countries. Furthermore, any harmful impacts on the environment have not been recorded yet. However, further studies are highly needed to assess the technical effectiveness of this surfactant for EOR processes with highly satisfying performance.