Effect of Zeta Potential on Collision-Attachment Coefficient and Removal Efficiency for Dissolved Carbon Dioxide Flotation

KimMi-Sug,; KwakDong-Heui,

doi:10.1089/ees.2016.0325

Cited by 14 publications

(5 citation statements)

References 27 publications

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“…It should be noted that the absolute values of the contact angle are subject to uncertainties inherent to the experimental setups such as the surface polishing process, as discussed in the literature; therefore, we consider our computational results to be valid based on the qualitative agreement in trends. Additionally, this trend is in agreement with theoretical calculations we conducted by the Frumkin–Derjaguin equation − based on experimental data of the zeta potential − and surface forces (see Text S3 and Table S5) as well as previous MD simulations of air–water–clay (talc, pyrophyllite, illite, and muscovite) systems . The agreement with these theoretical and simulation studies further reinforces the findings of our MD simulations.…”

Section: Resultssupporting

confidence: 91%

Correlation between Contact Angle and Water Film Energetics in Carbon Dioxide–Water–Clay Mineral Interfacial Systems: A Molecular Dynamics Study

Shiga,

Morishita,

Aichi

et al. 2023

Energy Fuels

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The wettability of mineral surfaces is an important parameter influencing the fluid flow in geological formations intended for the storage of carbon dioxide (CO2). Hence, the effects of the layer charge of clay minerals on their wettability should shed light on the variation of the solid–fluid interaction and its impact on the contact angle and water film energetics in CO2–water–clay mineral systems. Given the nanoscale thickness of the films formed on mineral surfaces and the difficulty of directly evaluating the related energetics, we use molecular dynamics simulations to investigate the effects of layer charge on the contact angle (water vs CO2) and the energetics of water films in clay slit-pore systems. An increase in the negative layer charge is shown to decrease the contact angle and increase the thickness of the water film. Permeation free energy calculations indicate that the amount of work needed to make the CO2 molecules approach the surface increases with increasing negative layer charge. These findings allow the establishment of a correlation between the contact angle and film energetics and thus enable us to propose a novel approach to complement direct contact angle calculations. Moreover, the present analysis of the structure and dynamics of the adsorbed water provides us with new insights into the change in the film energetics from an atomic-scale perspective, which cannot be gained using the widely used thermodynamic model; the connectivity of the adsorbed water molecules on the surface explains the effects of the layer charge on the contact angle and film energetics.

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Section: Resultssupporting

confidence: 91%

Correlation between Contact Angle and Water Film Energetics in Carbon Dioxide–Water–Clay Mineral Interfacial Systems: A Molecular Dynamics Study

Shiga,

Morishita,

Aichi

et al. 2023

Energy Fuels

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“…h D is the dimensionless distance. In this work, the data of the zeta potential of brine/muscovite [28][29][30] and brine/CO 2 [31] are used as the parameters in Π ele .…”

Section: Geofluidsmentioning

confidence: 99%

“…Charge reversal of two surfaces of the brine film, from the same signs to the opposite signs, is a key mechanism of the contact angle alteration of the oil/brine/mineral systems [45]. In this study, the averaged value of three zeta potential values of brine/muscovite using data from Alonso et al [28], Au et al [29], and Zhou et al [30] were used for ϕ BM , and data from Kim and Kwak [31] was used for ϕ BC . In these maps, contact angles calculated from each ϕ BM are plotted.…”

Section: Geofluidsmentioning

confidence: 99%

Quantitative Investigation on the Contributing Factors to the Contact Angle of the CO2/H2O/Muscovite Systems Using the Frumkin-Derjaguin Equation

2020

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It is significant to understand the values and trends of the contact angle of CO2/brine/mineral systems to evaluate and model the sealing performance of CO2 Geo-Sequestration (CGS). It has been reported that the contact angles of the CO2/brine/muscovite systems increase as pressure increases from ambient conditions to reservoir conditions. This trend suggests a decrease in seal integrity. In this paper, we studied its mechanisms and the contributing factors by calculating the Frumkin-Derjaguin equation, which is based on the thermodynamics of the interfacial system. Results show that a decrease of pH is a critical factor for the wettability alteration at a lower pressure range (0.1 MPa to 3.0 MPa). In contrast, the increase of CO2 density and the decrease in the interfacial tension of CO2/brine are significant for the wettability change at a higher pressure range (3.0 MPa to 10.0 MPa). Also, sensitivity analysis shows that the contact angle is sensitive to the interfacial tension of CO2/brine and the coefficients of hydration forces.

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“…In the case of PEI loading, PEI functionalized silica xerogels with positively charge were obtained. It is known that zeta potential of CO2 molecules without surfactants changes from ~ -14 mV to ~ 32 mV depending on pH (2 -12) (Kim and Kwak, 2017). So, it can be said that good interactions between PEI functionalized silica xerogels and CO2 molecules are expected. )…”

Section: Resultsmentioning

confidence: 99%

Polietilenimin ile Modifiye Edilmiş Silika Kserojellerin Kullanımı ile CO2 Tutumu

Kaya

Deveci

2021

Konya Journal of Engineering Sciences

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CO2 capture technologies using solid adsorbents are promising approach to reduce environmental pollution resulting from CO2 emission. In this study, silica xerogel derived from cheap precursor was used as a CO2 adsorbent after polyethyleneimine (PEI) functionalization. Fourier transform infrared (FTIR) analyses indicated that PEI functionalized silica xerogels were successfully prepared. N2 adsorption-desorption isotherms revealed that PEI loading decreased specific surface area and pore volume of the neat silica xerogel in contrast to pore size. An increase in particle size of the neat silica xerogel was observed in the case of PEI loading. Positively surface charged silica xerogels were obtained with PEI loading of the neat silica xerogel which had negatively charged surface. CO2 adsorption measurements showed that CO2 adsorption capacity of the neat silica xerogel (0.98 mmol g -1 ) significantly increased with increasing PEI loading (30 -70 wt%). At optimum PEI loading (50 wt%), CO2 adsorption capacity of silica xerogel was determined as 1.94 mmol g -1 . After 5 adsorptiondesorption cycles, PEI functionalized silica xerogels still exhibited high CO2 adsorption capacity. The hopeful results showed that PEI functionalized silica xerogels can be used as an adsorbent with a good CO2 adsorption performance and stability.

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Effect of Zeta Potential on Collision-Attachment Coefficient and Removal Efficiency for Dissolved Carbon Dioxide Flotation

Cited by 14 publications

References 27 publications

Correlation between Contact Angle and Water Film Energetics in Carbon Dioxide–Water–Clay Mineral Interfacial Systems: A Molecular Dynamics Study

Correlation between Contact Angle and Water Film Energetics in Carbon Dioxide–Water–Clay Mineral Interfacial Systems: A Molecular Dynamics Study

Quantitative Investigation on the Contributing Factors to the Contact Angle of the CO2/H2O/Muscovite Systems Using the Frumkin-Derjaguin Equation

Polietilenimin ile Modifiye Edilmiş Silika Kserojellerin Kullanımı ile CO2 Tutumu

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