High internal phase CO2-in-water emulsions stabilized with a branched nonionic hydrocarbon surfactant

Dhanuka, Varun V.; Dickson, Jasper L.; Ryoo, Won; Johnston, Keith P.

doi:10.1016/j.jcis.2005.11.057

Cited by 94 publications

(77 citation statements)

References 67 publications

(108 reference statements)

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“…(Tewes and Boury, 2004, Owens and Wendt, 1969, da Rocha et al, 2001, Kvamme et al, 2007, Dhanuka et al, 2006, H 2 O and polymer (Sundberg et al, 1990, Webber et al, 1997 as well as between CO 2 and polymer at 100 bar and 35 °C, without any surfactant in either phase. The spreading coefficients are also collected in Table 1.…”

Section: Figurementioning

confidence: 99%

“…For simplicity, sodium dodecyl sulfate (SDS) has been chosen as surfactant to perform the calculations of Torza . Table 2 shows the interfacial tensions between H 2 O/SDS and CO 2 (Dhanuka et al, 2006), H 2 O/SDS and polymer (Sundberg et al, 1990, Sundberg andSundberg, 1993) and CO 2 and polymer, as well as the spreading coefficients. Otake et al (2004) reported about the interfacial tension at the CO 2 /polymer interface in the presence of tetradecanoic acid (MA), demonstrating the surface activity of carboxylic surfactants.…”

Section: Figurementioning

confidence: 99%

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Residual Monomer Reduction in Polymer Latex Products by Extraction with Supercritical Carbon Dioxide

Aerts

Meuldijk

Kemmere

et al. 2011

Macromolecular Symposia

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Summary: Extraction of residual monomer from a latex product with supercritical carbon dioxide ((sc)CO2) in a column was studied. Operating conditions were chosen at 35 °C and 100 bar. For reducing the residual styrene level in a polystyrene latex from 104 ppm to 100 ppm and from 104 ppm to 10 ppm, a countercurrent bubble column with latex as continuous and (sc)CO2 as dispersed phase is suggested. Monomer partitioning was demonstrated to be a key parameter in the equipment design. Monomer transport was found to be governed by the shuttle effect, caused by Brownian motion of the latex to and from the H2O/CO2 interface. The drift‐flux approach was followed to determine the column flooding conditions. Small column volumes are obtained. (sc)CO2 is a promising extraction medium for residual monomer reduction in latex products. Performance towards steam stripping is better as the final residual monomer level becomes lower.

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Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Residual Monomer Reduction in Polymer Latex Products by Extraction with Supercritical Carbon Dioxide

Aerts

Meuldijk

Kemmere

et al. 2011

Macromolecular Symposia

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“…DhanuKa et al [39] used a new kind of emulsifier, TMN-6 (octa(ethylene glycol)-2,6,8-trimethyl-4-nonyl ether), for CO 2 emulsion preparation. According to DhanuKa's experiment, at a temperature below 318 K, the stability of the emulsion increases with pressure and the mass ratio of CO 2 in the emulsion, in some cases the stable time of the emulsion with 90% CO 2 in the emulsion can exceed 24 h.…”

Section: Replacement Of Ch 4 Hydrate By Use Of Co 2 Emulsionmentioning

confidence: 99%

“…From the figures, it can be concluded that the replacement rate and efficiency with CO 2 emulsion are both higher than that with gaseous CO 2 and liquid CO 2 . Furthermore, Zhou et al proved that the higher quality fraction of CO 2 in water results in the higher replacement efficiency, and Dhanuka et al [39] pointed the varieties and contents of emulsifier have an important influence on the stability of CO 2 emulsions and suggested that a higher pressure and quality fraction of CO 2 in water can improve the stability of CO 2 emulsions. To sum up, CO 2 emulsion with higher quality fraction of CO 2 and opportune emulsifier should be selected for the replacement reaction, and the initial pressure should be appropriately high.…”

Section: Research On Factors Influencing the Replacement Reactionmentioning

confidence: 99%

A Review on Research on Replacement of CH4 in Natural Gas Hydrates by Use of CO2

et al. 2012

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This paper introduces the research advances on replacement of CH 4 in Natural Gas Hydrates (NGHs) by use of CO 2 and discusses the advantages and disadvantages of the method on the natural gas production from such hydrates. Firstly, the feasibility of replacement is proven from the points of view of kinetics and thermodynamics, and confirmed by experiments. Then, the latest progress in CH 4 replacement experiments with gaseous CO 2 , liquid CO 2 and CO 2 emulsion are presented Moreover, the superiority of CO 2 emulsion for replacement of CH 4 is emphasized. The latest experiment progress on preparation of CO 2 emulsions are introduced. Finally, the advancements in simulation research on replacement is introduced, and the deficiencies of the simulations are pointed. The factors influencing on the replacement with different forms of CO 2 are analyzed and the optimum conditions for the replacement of CH 4 in hydrated with different forms of CO 2 is suggested. Keywords: gas hydrate; replacement; carbon dioxide; feasibility; emulsion; simulation OPEN ACCESSEnergies 2012, 5 400 Nomenclature: t = time, s X CH 4 /X CO 2 = ratio of CH 4 and CO 2 in the vapor phase (X CH 4 /X CO 2 ) 0 = initial ratio of CH 4 and CO 2 in the vapor phase α = fitting parameter related to the a condensation rate of CH 4 molecules from the vapor phase n CH 4 .H = remaining amount of CH 4 in the hydrate phase, mol n CO 2 .H = amount of CO 2 in the hydrate phase, mol f = fugacity, MPa k Dec = overall rate constant of the decomposition, mol/s·m·MPa k Dec.R = reaction rate constant of decomposition, mol/s·m·MPa k Dec.D = decomposition rate constant of mass transfer in the hydrate phase, mol/s·m·MPa k Form = overall rate constant of the formation, mol/s·m·MPa k Form.R = reaction rate constant of formation, mol/s·m·MPa k Form.D = formation rate constant of mass transfer in the hydrate phase, mol/s·m·MPa A = surface area between the gas and the hydrate phase, m 2 H = hydrate phase G = gas phase

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“…A lot of effort has put into obtaining low toxicity and low price CO 2 -soluble surfactants, of which non-fluorinated AOT (sodium bis(2-ethylhexyl)-sulfosuccinate) (Eastoe et al 2001;Liu and Erkey 2001) and nonionic surfactants Xing et al 2012) were of most interest. Dhanuka et al (2006) noted that DOW Tergitol TMN 6 was an effective foaming agent characterized by stable, white, and opaque foams formed at 25°C and 345 bar. Fan et al (2005) established that oligo vinyl acetate (OVAc) is extremely CO 2 -philic and suitable for incorporation into CO 2 -soluble ionic surfactants.…”

Section: Introductionmentioning

confidence: 99%

Understanding aqueous foam with novel CO2-soluble surfactants for controlling CO2 vertical sweep in sandstone reservoirs

Ren

Nguyen

2017

Pet. Sci.

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The ability of a novel nonionic CO 2 -soluble surfactant to propagate foam in porous media was compared with that of a conventional anionic surfactant (aqueous soluble only) through core floods with Berea sandstone cores. Both simultaneous and alternating injections have been tested. The novel foam outperforms the conventional one with respect to faster foam propagation and higher desaturation rate. Furthermore, the novel injection strategy, CO 2 continuous injection with dissolved CO 2 -soluble surfactant, has been tested in the laboratory. Strong foam presented without delay. It is the first time the measured surfactant properties have been used to model foam transport on a field scale to extend our findings with the presence of gravity segregation. Different injection strategies have been tested under both constant rate and pressure constraints. It was showed that novel foam outperforms the conventional one in every scenario with much higher sweep efficiency and injectivity as well as more even pressure redistribution. Also, for this novel foam, it is not necessary that constant pressure injection is better, which has been concluded in previous literature for conventional foam. Furthermore, the novel injection strategy, CO 2 continuous injection with dissolved CO 2 -soluble surfactant, gave the best performance, which could lower the injection and water treatment cost.

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High internal phase CO2-in-water emulsions stabilized with a branched nonionic hydrocarbon surfactant

Cited by 94 publications

References 67 publications

Residual Monomer Reduction in Polymer Latex Products by Extraction with Supercritical Carbon Dioxide

Residual Monomer Reduction in Polymer Latex Products by Extraction with Supercritical Carbon Dioxide

A Review on Research on Replacement of CH4 in Natural Gas Hydrates by Use of CO2

Understanding aqueous foam with novel CO2-soluble surfactants for controlling CO2 vertical sweep in sandstone reservoirs

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