RT Journal Article
T1 Evaluation of surfactant blends for enhanced oil recovery through activity maps
A1 Tafur, Nestor
A1 Somoza Cerviño, Alba
A1 Soto Campos, Ana María
K1 Anionic
K1 Cationic
K1 Ionic liquid
K1 Microemulsion
K1 Winsor III
AB Better use of already exploited oil reservoirs using Enhanced Oil Recovery techniques is becoming essential. The use of surfactant blends is a common approach when individual surfactants are not effective. However, defining the optimum conditions for application becomes very challenging due to the number of variables involved in specific cases. In this work, blends of dioctyl sulfosuccinate sodium salt with Akypo LF2 and two surfactant ionic liquids (1-decyl-3-methylimidazolium chloride and 1-dodecyl-3-methylimidazolium bromide) were evaluated for oil recovery. Activity maps, representations of the phase behavior of the surfactants as a function of blend ratio, salinity and temperature, were found to be useful tools to describe conditions leading to Winsor type III systems. Among the blends studied, mixtures with Akypo LF2 were found of interest for application at low temperatures, showing interfacial tensions close to 0.01 mN/m in a wide range of salinity concentrations. In the case of blends with ionic liquids, even though they led to more promising solubilization parameters, the high sensitivity of these mixtures to blend ratio changes discourages, in principle, their use for practical applications
PB Elsevier
YR 2022
FD 2022
LK http://hdl.handle.net/10347/29176
UL http://hdl.handle.net/10347/29176
LA eng
NO Journal of Molecular Liquids  364 (2022) 119984
NO The authors acknowledge the Ministry of Science and Innovation and State Research Agency (AEI, 10.13039/501100011033) for financial support throughout project PGC2018-097342-B-I00, including European Regional Development Fund. A. Somoza also acknowledges predoctoral financial support (grant ref. PRE2019-089101)
DS Minerva
RD 27 abr 2026