Influence of nacl in ionic surfactants adsorption in sandstone surface
International Journal of Development Research
Influence of nacl in ionic surfactants adsorption in sandstone surface
Received 29th December, 2017; Received in revised form 29th January, 2018; Accepted 08th February, 2018; Published online 30th March, 2018
Copyright © 2018, Curbelo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Low interfacial tensions are one of the most important mechanisms relating to surfactant. Surfactant loss due to adsorption on the rock surfaces weakens the effectiveness of the chemical injected slurry, in reducing oil-water interfacial tension (IFT) and renders the process uneconomical. Surfactant flooding is enhanced oil recovery method (EOR) adopted in partially depleted oil reservoirs. However, surfactant adsorption can occur reducing the efficiency of EOR methods used. This work studied the influence of NaCl on anionic surfactant adsorption on sandstone. NaCl concentrations of 1.0 and 4.0% (w/w) were tested and adsorption isotherms were constructed. FTIR, XRD and thermogravimetric analysis were realized for support adsorption mechanism. The adsorption isotherms showed that salt concentration influenced the amount of adsorbed surfactant.
