Experimental Study on Static Adsorption Behavior of aNovel Surfactant on Carbonate Rock

Surfactants have ability to reduce the interfacial tension between residual oil and water and give higher recovery factor. Adsorption of surfactant onto the solid surface makes it less effective in reduction of interfacial tension in enhanced oil recovery (EOR) applications. Adsorption of Trigoonella foenum-graceum (TFG) as a newly introduced nonionic surfactant on crushed carbonate rock was investigated. Conductivity technique was used to measure amount of surfactant adsorbed on crushed rock. Batch experiments were used to investigate the adsorption of surfactant on solid rock surface. It is observed that increase in surfactant concentration increases the adsorption. Four adsorption isotherms (Langmuir, Freundlich, Temkin, and Linear) were introduced to our data and adsorption parameters for each model were calculated. We conclude that the Langmuir isotherm is the best model for describing our data. The results of this study can be useful in surfactant selection in EOR processes especially for chemical flooding schemes.

کلیدواژه ها:

Trigoonella foenum-graceum (TFG) ، Adsorption isotherm ، Carbonate rock