Effect of Foam Boosters on the Micellization and Adsorption of Sodium Dodecyl Sulfate

Prajapati, Ramesh R.; Bhagwat, Sunil S.

doi:10.1021/je3008155

Cited by 15 publications

(7 citation statements)

References 19 publications

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“…The system which contained CAPB in association with SDS but not in enough concentration that it would allow formation of micelles too enhanced hydrate formation kinetics as compared to pure water, but the kinetics was largely the same when compared to the 1 wt % SDS system. There was a slight increase in the initial kinetics which may be down to the fact that the addition of CAPB lowers the surface tension of the system, allowing greater diffusivity of the gas initially . The 1 wt % CAPB system too showed kinetics akin to that for the 1 wt % SDS system with a considerable enhancement in the same when compared to pure water.…”

Section: Resultsmentioning

confidence: 95%

“…There was a slight increase in the initial kinetics which may be down to the fact that the addition of CAPB lowers the surface tension of the system, allowing greater diffusivity of the gas initially. 29 The 1 wt % CAPB system too showed kinetics akin to that for the 1 wt % SDS system with a considerable enhancement in the same when compared to pure water. Thus, to sum up, when using pure methane as the hydrate forming gas, maximum enhancement in growth kinetics was observed with the 0.5 wt % SDS + 0.5 wt % CAPB system with the other three systems following close behind (the kinetics obtained for the latter three systems being too close to each other to confidently place them in an order).…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 92%

“…The 0.038 mole fraction of this surfactant reduces the Krafft point of SDS by 1 K. 28 Moreover, addition of CAPB was found to reduce the CMC and the surface tension of SDS. 29 It was assessed that, if the Krafft point of SDS could be reduced up to the hydrate formation temperature by the addition of CAPB, the system would stand a very realistic chance of containing micelles, which could then answer a number of questions regarding the kinetic promoting behavior of surfactants on gas hydrate formation and whether the presence of micelles affects the same. Similar studies mapping the interaction between betaine type zwitterionic surfactants and anionic surfactants have also been performed highlighting the formation of mixed micelles in such systems.…”

Section: ■ Introductionmentioning

confidence: 99%

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Effects of Micellization on Growth Kinetics of Methane Hydrate

Bhattacharjee

Kushwaha

Kumar

et al. 2017

Ind. Eng. Chem. Res.

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Surfactants are specific functional materials that form various types of self-assemblies and affect local water ordering alongside solution properties. Such surface active agents are used extensively in gas hydrate based applications as kinetic hydrate promoters. To understand the effect of surfactant micelles on hydrate formation kinetics, a novel surfactant system capable of producing micelles at hydrate forming temperature was developed. The presence of surfactant micelles in this new system (a combination of anionic surfactant SDS and zwitterionic surfactant CAPB) was determined through DLS measurements. Pure methane and a coal bed methane mixture were individually used to assess the efficacy of the surfactant mixture for hydrate formation. This study conclusively proves for the first time that the presence of surfactant micelles enhances hydrate formation kinetics. The findings reported here can contribute significantly toward improving the utility of surfactants in gas hydrate based technological applications such as gas separation and methane storage.

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Section: Resultsmentioning

confidence: 95%

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 92%

Section: ■ Introductionmentioning

confidence: 99%

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Effects of Micellization on Growth Kinetics of Methane Hydrate

Bhattacharjee

Kushwaha

Kumar

et al. 2017

Ind. Eng. Chem. Res.

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“…For instance, widely used anionic surfactant such as SDS and SDBS are efficient promoters for methane hydrate formation but their use for gas storage applications is not much feasible due to foam generation during degassing. Foam produced by SDS stays around for a long time due to its weak surface tension and high film strength because of its long alkyl chain . Heterogeneous promoters such as amphiphilic polymer-coated carbon nanotubes, grafting of nano-Ag particles on SO 3 – -coated nanopolymers, SO 3 – -coated graphene oxide nanosheets, and SO 3 – -coated nanopromoters help to alleviate foam formation by reducing the kinetics of hydrate formation. − Bhattacharjee et al studied the antifoaming ability of silicon-based surfactants combined with SDS for methane hydrate formation and observed that the silicon-based surfactant not only exhibits excellent antifoaming characteristics but also enhances kinetics of methane hydrate formation.…”

Section: Gas Storage Capacitymentioning

confidence: 99%

Kinetics of Methane Hydrate Formation in the Presence of 1-Dodecyl-2-pyrrolidinone and Tetrahydrofuran in Pure Water

Sahu

Sircar

Sangwai

et al. 2021

Ind. Eng. Chem. Res.

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The quest for novel kinetic promoters for efficient storage and safe transportation of natural gas in the form of hydrates is an ongoing endeavor. In this study, the kinetics of methane hydrate formation have been investigated in the presence of low-foaming, nonionic, 1-dodecyl-2-pyrrolidinone and tetrahydrofuran in aqueous solution in a stirred tank reactor. The first phase of experiments has been conducted at 5 MPa and 274.15 K with varying concentrations of 1-dodecyl-2-pyrrolidinone (0.1, 0.5, 1, and 2 wt %). Similarly, the second phase of experiments has been conducted with two different concentrations of THF (19.49 and 3.89 wt %) along with 0.5 and 2 wt % of 1-dodecyl-2-pyrrolidinone using methane gas as the hydrate former at 5 MPa and 282.55 K. The pressure and temperature conditions are chosen covering both sI and sII regions. Information on the number of moles of gas consumed during hydrate formation, induction time, water-to-hydrate/gas-to-hydrate conversion, and gas storage capacity are investigated. It is observed that 1-dodecyl-2-pyrrolidinone shows good hydrate promotion characteristics with pure water for all the selected concentrations, with 0.5 wt % being on the higher side. Also, it has been observed that 1-dodecyl-2-pyrrolidinone serves as an effective kinetic promoter for the mixed methane–tetrahydrofuran hydrate at a moderate pressure and temperature of 5 MPa and 282.55 K. This study will assist in storing multifold volumes of natural gas in compact hydrate crystals suitable for natural gas storage and transportation applications.

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“…的电性斥力, 增大界面吸附量, 提高界面活性的效果十分显著 [9～11] . 也有报道表明两性表面活性剂与离子型表面活性剂在混合胶束化和表面吸附中也存在复配协同作用 [12,13] . 比如两性表面活性剂甜菜碱和离子型表面活性剂十二烷基硫酸钠 SDS 混合体系的复配增效作用在研究和应用中得到了证实 [14～16] .…”

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Study of the Synergistic Effect of Sodium Dodecyl Sulfate and Betaine at the Air/Water and Oil/Water Interfaces

Li¹,

Lv²,

Cao³

et al. 2014

Acta Chim. Sinica

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In this paper, the molecular array behavior of anionic surfactant sodium dodecyl sulfate SDS and zwitterionic surfactant Betaine at the air/water and oil/water interfaces were investigated by molecular simulation approaches, which helped to understand the effects of temperature, salts and the proportion of components on the interfacial activity and foam stability of the mixed binary systems, especially how the multivalent inorganic cations influence the interfacial adsorption behavior of the surfactants and the synergistic effect. The oil/water interfacial tension was not only measured experimentally using TEXAS500 spinning drop interface tension meter, but also calculated theoretically using dissipative particle dynamic (DPD) method. Foam decay method was utilized to determine the foam stability. The array behavior of surfactant molecules at the air/water and oil/water interfaces was described by molecular dynamics (MD) simulation method. It was found that the oil/water interfacial activity of mixed binary system was significantly better than unitary system. The synergistic effect between SDS and Betaine was enhanced when there was Ca 2＋ or Mg 2＋ existed in the solution. The radial distribution function of head groups of surfactants around inorganic ions showed that there was very strong interaction between the Ca 2＋ or Mg 2＋ and the head groups of SDS and Betaine, which not only induced the increase of the maximum interfacial adsorption quantity of the surfactants, but also adjusted the array states of the surfactant molecules in the interface layer. When the proportion of components of SDS/Betaine binary system was 4∶6, the oil/water interfacial activity and foam stability of the binary system both were very good with Ca 2＋ or Mg 2＋ existing, even use sea water as medium, which could be a good candidate system for foam system used under high salinity condition. The co-adsorption behavior of the surfactant molecules in the binary system at oil/water interface and the foam films was found to be similar. The simulation results agreed well with the experiment results. The knowledge about the microscopic character of the mixtures of surfactants at interfaces could provide useful guidance for the design and application of surfactants under the condition of high salinity, such as low tension foam flooding system used in offshore EOR.

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Effect of Foam Boosters on the Micellization and Adsorption of Sodium Dodecyl Sulfate

Cited by 15 publications

References 19 publications

Effects of Micellization on Growth Kinetics of Methane Hydrate

Effects of Micellization on Growth Kinetics of Methane Hydrate

Kinetics of Methane Hydrate Formation in the Presence of 1-Dodecyl-2-pyrrolidinone and Tetrahydrofuran in Pure Water

Study of the Synergistic Effect of Sodium Dodecyl Sulfate and Betaine at the Air/Water and Oil/Water Interfaces

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