Aspects of Interaction of Surfactant—Acid Compositions at Phase Boundary with Hydrocarbons

Silin, M. A.; Магадова, Л. А.; Tolstykh, L. I.; Davletshina, L. F.; Vlasova, V. D.; Yunusov, Timur Ildarovich; Makarova, A. M.

doi:10.1134/s1070427219120241

Cited by 4 publications

(7 citation statements)

References 13 publications

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“…showed the best results. The research results presented in Figure 3 show that an increase in the concentration of sulfamic acid led to a decrease in the corrosion rate, which is also consistent with the data obtained in [27]. This can be explained by the activity of the acid itself due to the possibility of its existence in two forms [33]: neutral and zwitterionic, with surface activity, as well as the positive effect of sulfamic acid on the effectiveness of surfactants [28].…”

Section: Gravimetric Studiessupporting

confidence: 85%

“…the CMC value was reduced to 0.2% wt. This corresponds to the data obtained in [27,28] since the ability to reduce the critical concentration of surfactant micelle formation with an increase in the acid concentration is considered to be a well-known feature of sulfamic acid [29]. This is explained by the tendency of the sulfamate anion to "salting out the surfactant" and thereby reduce the CMC and the interfacial tension of surfactant solutions [30].…”

Section: Determination Of the Critical Concentration Of Micelle Forma...supporting

confidence: 84%

“…An increase in acid concentration from 5 to 15% wt. led to a decrease in the contact angle, which can be explained by the negative effect of hydrochloric acid on the surface activity of surfactant molecules, as shown earlier [27]. In Figure 10b, one can see a significant decrease in the contact angle in a 5% hydrochloric acid solution without the addition of an inhibitor compared to the data in Figure 10a.…”

Section: Study Of the Contact Angle Of Wettingsupporting

confidence: 67%

“…Figure 2 shows the results of the corrosion rate when various concentrations of the inhibitor were added to aqueous solutions of hydrochloric acid 5%, 10%, and 15% wt. Earlier [27], it was noted that an increase in hydrochloric acid concentration in solution reduces the activity of cationic surfactant molecules due to an increase in the concentration of hydronium ions formed during the dissociation of hydrochloric acid [31]. According to the data obtained (Figure 2), an increase in the concentration of hydrochloric acid negatively affected the activity of the inhibitor, and the corrosion rate increased in the range of 5 to 15% wt.…”

Section: Gravimetric Studiesmentioning

confidence: 80%

“…Based on the data in Figure 9b, it can be concluded that a decrease in the values of interfacial tension with an increase in the concentration of sulfamic acid from 5 to 15 wt%. can be explained not only by a decrease in adsorption of the inhibitor but also by the ability of the acid itself to show surface activity due to its structure [27]. For these solutions containing the IC-2 inhibitor, after corrosion tests, an increase in the interfacial tension index during corrosion could also be noted.…”

Section: Study Of Interfacial Tensionmentioning

confidence: 95%

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Comprehensive Study of the Action of Corrosion Inhibitors Based on Quaternary Ammonium Compounds in Solutions of Hydrochloric and Sulfamic Acids

et al. 2021

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Acid treatments are one of the methods for intensifying oil and gas production. Corrosion is a significant factor affecting the performance of oilfield equipment. There are many different methods of preventing corrosion, but corrosion inhibitors are most commonly used in industry. The protective effect of the inhibitor is directly determined by the effective adsorption of surfactants on the metal surface. For an indirect assessment of the adsorption of the inhibitor, a comprehensive research method is proposed based on the determination of the interfacial tension of acid compositions and steel plates’ contact angle of wetting after corrosion tests. It was found that in hydrochloric acid the adsorption of the inhibitor IC-1 reaches a maximum after 6 h, an increase in the acid concentration in the range of 5–15% wt. has a negative effect on the activity of the inhibitor. For sulfamic acid, the maximum adsorption of the IC-2 inhibitor is observed after 24 h, an increase in acid concentration has a positive effect on surfactants.

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Section: Gravimetric Studiessupporting

confidence: 85%

Section: Determination Of the Critical Concentration Of Micelle Forma...supporting

confidence: 84%

Section: Study Of the Contact Angle Of Wettingsupporting

confidence: 67%

Section: Gravimetric Studiesmentioning

confidence: 80%

Section: Study Of Interfacial Tensionmentioning

confidence: 95%

See 3 more Smart Citations

Comprehensive Study of the Action of Corrosion Inhibitors Based on Quaternary Ammonium Compounds in Solutions of Hydrochloric and Sulfamic Acids

et al. 2021

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Review of Chelating Agents Use for Well Stimulation in Carbonate Reservoirs

Silin

Магадова

Davletshina

et al. 2022

NGD

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Study of Chelating Agent—Surfactant Interactions on the Interphase as Possibly Useful for the Well Stimulation

et al. 2023

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Chelating agents’ application for EOR and well stimulation is fast growing nowadays. However, reagents of this class have some drawbacks, with high values of interfacial tension (IFT) being among them. IFT may be lowered with the addition of surfactants; however, the simultaneous application of chelating agents and surfactants has not yet been widely studied. This paper focuses on the experimental and theoretical investigation of the interaction between chelating agent (ethylenediaminetetraacetic acid, EDTA) and surfactants of anionic and cationic types (sodium dodecyl sulfate, SDS, and dodecyl trimethynlammonium bromide, DTAB). IFT measurement was performed at ambient conditions, with normal octane being as the reference hydrocarbon to eliminate the temperature and salinity effects and compare surfactant-containing systems. The experimental results show that chelating agents’ addition to the solutions of surfactants leads to a decrease in IFT value. Moreover, surfactants’ critical micelle concentration is lowered, whereas their effectiveness and efficiency are increased, which points to the salting-out nature of chelating agents. Molecular dynamics reveal that chelating agent addition causes closer packing of surfactant layer, the decrease in head groups’ hydration, and, at least in the case of SDS, specific surfactant–chelating agent attractive interaction. These molecular-level insights, experimental dependencies, and the combined methodology may be useful for the proper selection of fluids for real-field operations.

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Aspects of Interaction of Surfactant—Acid Compositions at Phase Boundary with Hydrocarbons

Cited by 4 publications

References 13 publications

Comprehensive Study of the Action of Corrosion Inhibitors Based on Quaternary Ammonium Compounds in Solutions of Hydrochloric and Sulfamic Acids

Comprehensive Study of the Action of Corrosion Inhibitors Based on Quaternary Ammonium Compounds in Solutions of Hydrochloric and Sulfamic Acids

Review of Chelating Agents Use for Well Stimulation in Carbonate Reservoirs

Study of Chelating Agent—Surfactant Interactions on the Interphase as Possibly Useful for the Well Stimulation

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