Phase behavior of pseudoternary brine/alkane/alcohol-secondary alkanesulfonates systems

Azira, Hakima; Tazerouti, Amel; Canselier, Jean-Paul

doi:10.1007/s10973-007-8388-x

Cited by 6 publications

(7 citation statements)

References 24 publications

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“…A single phase region (Winsor IV) is observed as the transition occurs from an oil-in-water microemulsion near the water apex to a water-in-oil microemulsion near the n-heptane apex through a bicontinuous structure. The large area of oil in water microemulsion formed by surfactant is due to the large molecular packing ratio of surfactant in the two phase region (Winsor I) (Azira et al, 2008;Bera et al 2011).…”

Section: Measurement Of Tgamentioning

confidence: 99%

Synthesis and Characterization O F Sodium Methyl Ester Sulfonate for Chemically-Enhanced Oil Recovery

Babu¹,

Maurya²,

Mandal³

et al. 2015

Braz. J. Chem. Eng.

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Attention has been given to reduce the cost of surfactant by using castor oil as an alternative natural source of feedstock. A new surfactant, sodium methyl ester sulfonate (SMES) was synthesised using ricinoleic acid methyl ester, which is obtained from castor oil, for enhanced oil recovery in petroleum industries. The performance of SMES was studied by measuring the surface tension with and without sodium chloride and its thermal stability at reservoir temperature. SMES exhibited good surface activity, reducing the surface tension of surfactant solution up to 38.4 mN/m and 27.6 mN/m without and with NaCl, respectively. During the thermal analysis of SMES, a 31.2% mass loss was observed from 70 °C to 500 °C. The phase behavior of the cosurfactant/SMES-oil-water system plays a key role in interpreting the performance of enhanced oil recovery by microemulsion techniques. Flooding experiments were performed using a 0.5 pore volume of synthesized SMES solutions at three different concentrations. In each case chase water was used to maintain the pressure gradient. The additional recoveries in surfactant flooding were found to be 24.53%, 26.04% and 27.31% for 0.5, 0.6 and 0.7 mass% of surfactant solutions, respectively.

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Section: Measurement Of Tgamentioning

confidence: 99%

Synthesis and Characterization O F Sodium Methyl Ester Sulfonate for Chemically-Enhanced Oil Recovery

Babu¹,

Maurya²,

Mandal³

et al. 2015

Braz. J. Chem. Eng.

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“…The influence of temperature on optimal salinity is quite complex. For the anionic microemulsion system, it was observed that optimal salinity increases with an increase in temperature. , A medium chain alcohol or other amphiphilic cosurfactant must be required for microemulsion formation in the case of anionic and cationic surfactants. − One reason for the use of cosurfactant that the most commercial surfactants are not balanced with respect to their affinity to water and oil but can be made so by the addition of alcohol. Furthermore, for ionic surfactants the electrostatic interactions have to be screened by salt as a fifth component in the system.…”

Section: Introductionmentioning

confidence: 99%

Phase Behavior and Physicochemical Properties of (Sodium Dodecyl Sulfate + Brine + Propan-1-ol + Heptane) Microemulsions

et al. 2012

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Experimental investigations have been made on the phase behavior of the (sodium dodecyl sulfate + brine + propan-1-ol + heptane) microemulsion system and its stability under reservoir conditions for its use in enhanced oil recovery (EOR). An increase in salinity is found to decrease the single-phase microemulsion region as salt interacts with surfactant to reduce its activity. As salinity changes from a low to high value, a phase transition takes place from Winsor I to Winsor II via Winsor III. The temperature also induces a phase transition for low- and high-salinity microemulsion systems. With an increase in temperature, the phase transition takes place from Winsor I to Winsor III for low salinity and Winsor II to Winsor III for high salinity microemulsion systems. The solubilization parameter of oil increases with an increase in salinity, whereas that of water decreases and at optimal salinity both are same. With increasing salinity, interfacial tension (IFT) between oil and microemulsion decreases, whereas that of water and microemulsion increases. At optimal salinity, both IFT values are the same. The optimal salinity increases with increasing temperature. Interestingly the conductivity of the middle-phase microemulsion system showed maxima around optimal salinity.

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“…It showed that at solution with higher A/S, type II microemulsion was a dominant phase. [34] In Figure 6 we observed that both TBA and BuOH caused lower oil density when higher surfactant concentration was used (4 wt% vs 2 wt%), and both alcohols did not show much difference in oil density modification at low A/S ratio. However, BuOH caused lower oil density at high A/S mass ratio (A/S = 1.6).…”

Section: Solubilization Behavior and Oil Phase Density Modificationmentioning

confidence: 84%

Behavior of DNAPL mixture of organometallic and chlorinated solvent in the presence of surfactants and alcohols as density modifying agents

Talawat¹,

Sabatini²,

Tongcumpou³

2013

Journal of Environmental Science and Health, Part A

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This work evaluates the behavior of surfactant and alcohols in combination with a mixture of tributyltinchloride (TBT) and tetrachloroethylene (PCE) with the goal of modifying the mixed oil from being a dense non-aqueous phase liquid (DNAPL) to a light non-aqueous phase liquid (LNAPL). Phase behavior of the mixed oil was studied under various combinations of surfactant, alcohol, and salinity. Phase density conversion was examined using pseudo-ternary phase diagrams constructed between the mixed oil, surfactant solution (4 wt%), and two types of alcohols (n-butyl alcohol (BuOH) and tert-butyl alcohol (TBA)). Aqueous phase solubilization and oil phase density modification were studied at varying alcohol to surfactant (A/S) ratios. The results showed that the optimum surfactant system was sodium dihexylsulfosuccinate (SDHS) and hexadecyl diphenyloxidedisulfonate (C16DPDS) (3.6 wt% and 0.4 wt%, respectively) with salt (NaCl) of 3 wt%. From pseudo-ternary phase diagrams, BuOH was found to produce a larger LNAPL region than TBA. From solubilization studies, the surfactant system plus either TBA or BuOH caused PCE preferential solubilization and this preference was more pronounced at higher total surfactant concentration in the system with TBA addition. In terms of density modification, BuOH produced lower oil density than TBA at high A/S ratio. This phase behavior knowledge can be used to optimize site remediation of organometallic DNAPLs.

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Phase behavior of pseudoternary brine/alkane/alcohol-secondary alkanesulfonates systems

Cited by 6 publications

References 24 publications

Synthesis and Characterization O F Sodium Methyl Ester Sulfonate for Chemically-Enhanced Oil Recovery

Synthesis and Characterization O F Sodium Methyl Ester Sulfonate for Chemically-Enhanced Oil Recovery

Phase Behavior and Physicochemical Properties of (Sodium Dodecyl Sulfate + Brine + Propan-1-ol + Heptane) Microemulsions

Behavior of DNAPL mixture of organometallic and chlorinated solvent in the presence of surfactants and alcohols as density modifying agents

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