Modeling aqueous two-phase systems: I. Polyethylene glycol and inorganic salts as ATPS former

Reschke, Thomas; Brandenbusch, Christoph; Sadowski, Gabriele

doi:10.1016/j.fluid.2014.02.016

Cited by 53 publications

(36 citation statements)

References 79 publications

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“…In this work the salts were assumed to be fully dissociated into νan anions and νcat cations, and the isofugacity criterion for salts was hence expressed as [40]:…”

Section: Thermodynamic Modeling With Epc-saftmentioning

confidence: 99%

Influence of electrolytes on liquid-liquid equilibria of water/1-butanol and on the partitioning of 5-hydroxymethylfurfural in water/1-butanol

Mohammad

Grundl

Müller

et al. 2016

Fluid Phase Equilibria

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“…In this work the salts were assumed to be fully dissociated into νan anions and νcat cations, and the isofugacity criterion for salts was hence expressed as [40]:…”

Section: Thermodynamic Modeling With Epc-saftmentioning

confidence: 99%

Influence of electrolytes on liquid-liquid equilibria of water/1-butanol and on the partitioning of 5-hydroxymethylfurfural in water/1-butanol

Mohammad

Grundl

Müller

et al. 2016

Fluid Phase Equilibria

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“…1. An aqueous two-phase system phase diagram Such a method of protein extraction is a very complex phenomenon, and it is difficult to model, due to various factors that influence the partitioning of the solute, such as its hydrophobicity, molecular size, electrochemical properties, molecular conformation, biospecificity, and also the properties of the ATPS, such as the phase-forming components, pH, temperature and ionic strength (Azevedo et al, 2009), although models of specific phenomena, such as phase forming (Reschke et al, 2014), or partitioning of specific molecules (Pazuki et al, 2009) have been created. Therefore, each protein-ATPS combination can be treated as unique and requiring its own experimental data.…”

Section: Introductionmentioning

confidence: 99%

Partitioning of cerrena unicolor laccase activity in an aqueous two-phase system

Blatkiewicz

Górak

Ledakowicz

2016

Chemical and Process Engineering

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Culture supernatant containing laccase produced by Cerrena unicolor strain was used to examine laccase partitioning between phases in an aqueous two-phase system. The investigated system consisted of polyethylene glycol 3000 and sodium phosphate buffer adjusted to pH = 7. Influence of several parameters on partitioning was measured, including phase forming components' concentrations, tie line lengths, phase volume ratio, supernatant dilution, process temperature and halogen salt supplementation. Partitioning coefficients up to 78 in the bottom phase were achieved with yields of over 90%. Tie line length and phase volume ratio had significant effect on enzyme partitioning.

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“…7,8 But up to now, only Kontogeorgis and co-workers 9 applied PC-SAFT in their pioneering work to calculate triphasic liquid equilibrium data (LLLE), using the correlation of VLE and LLE data from binary systems in the calculation of ternary systems. The possibility of predicting the behaviour of these three-phase systems, in particular water-oil-surfactant, could mean a strong advantage in the development of all applications where three liquid phases appear in equilibrium.…”

Section: Introductionmentioning

confidence: 99%

Measurement and PC-SAFT modelling of three-phase behaviour

Rodríguez-Palmeiro

Rodrı́guez

Soto

et al. 2015

Phys. Chem. Chem. Phys.

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Modelling of multi-component systems with complex interactions is an ongoing challenge in thermodynamics due to their great relevance in industry and academia. Systems that build three liquid phases are found in many interesting applications (separation processes, triphasic catalysis…). Among them, the surfactant flooding method for enhanced oil recovery is noticeable. In this method, a stable solution of water, surfactants, co-surfactants, salts and other components is injected into the reservoir. The optimal formulation of this surfactant system is associated with a three-phase behaviour in which the interfacial tension becomes significantly low. In this work, the PC-SAFT equation of state was used for the first time to predict the equilibrium involved in triphasic systems using solely pure-component parameters. The model without any fitting parameter was able to predict the three-phase behaviour. A great agreement between experimental and predicted compositions for (water + [C10mim][NTf2] + n-dodecane) and (water + [C12mim][NTf2] + n-dodecane) ternary systems at 298.15 K and atmospheric pressure was found. At 348.15 K slightly higher deviations were found, which can be compensated by the introduction of just one binary interaction parameter. The success of this achievement could mean an important advancement in upstream oil operations, enabling a faster and cheaper method to carry out an initial screening of potential surfactants.

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Modeling aqueous two-phase systems: I. Polyethylene glycol and inorganic salts as ATPS former

Cited by 53 publications

References 79 publications

Influence of electrolytes on liquid-liquid equilibria of water/1-butanol and on the partitioning of 5-hydroxymethylfurfural in water/1-butanol

Influence of electrolytes on liquid-liquid equilibria of water/1-butanol and on the partitioning of 5-hydroxymethylfurfural in water/1-butanol

Partitioning of cerrena unicolor laccase activity in an aqueous two-phase system

Measurement and PC-SAFT modelling of three-phase behaviour

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