Effect of surfactants on the stability, rheological properties, and thermal conductivity of Fe3O4 nanofluids

Lei, Jiajie; Qing, Shan; Luo, Zhumei; Huang, Xiaoyan; Li, Fuyu

doi:10.1016/j.powtec.2022.117197

“…This aggregation of molecules culminates in a higher density, even while the temperature remains stable. Therefore, the observed gradual density increases over time, despite the constant temperature, can be attributed to the progressive development of molecular arrangements and associations within the crude oil [23]. The average density of the crude oil at 40, 60, and 80°C were 0.8369, 0.8305, and 0.8252 g/ml, correspondingly.…”

Section: Densitymentioning

confidence: 94%

A Comprehensive Study on MWCNTs and SDS Integration in Anionic Crude Oil for Enhanced EOR Processes

Bagheri,

Mousavi,

Nami

et al. 2023

Preprint

0

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This research delved into the effects of introducing multi-walled carbon nanotubes (MWCNTs) and sodium dodecyl sulfate (SDS) into crude oil with an anionic base, aiming to enhance its thermophysical attributes in the EOR process. The investigation encompassed a range of properties, including interfacial tension, viscosity, density, and electrical conductivity, measured using an LV rheometer with spindle 18. Various ratios of MWCNTs and SDS were mixed with the crude oil to evaluate their impacts. The study uncovered that the 1:1 ratio of MWCNTs to SDS achieved a noteworthy 10% reduction in interfacial tension while minimally affecting viscosity, showing promise for practical applications. Temperature had diverse effects on viscosity and interfacial tension, displaying fluctuating trends. The highest observed result was a substantial 190% viscosity increase at 40°C with a 2:1 ratio, whereas the lowest was a slight − 0.81% density change at 60°C for the 1:1 ratio. Additionally, interfacial tension consistently decreased over time for all ratios at various temperatures, with the most significant reductions observed at 40°C and 60°C, particularly for the 1:2 and 1:1 ratios. Furthermore, adding MWCNTs and SDS led to a remarkable drop in electrical conductivity, indicating a substantial decrease in salt content within the crude oil. However, it was noted that higher MWCNT concentrations might not be cost-effective, emphasizing the importance of optimizing additive ratios for a balance between performance and economic viability. This study highlights the potential of tailored nanofluid formulations to improve the thermophysical properties of crude oil, potentially enhancing extraction and refining processes.

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“…By comparison of the stability of nanofluids with SDS added to nanofluids and without SDS, they concluded that, as a small amount of SDS was added to the nanofluids, the repulsive forces among nanoparticles enhanced and the stability was strengthened. Lei et al 84 found in their experiments that tetramethylammonium hydroxide (TMAH) as a surfactant could maintain the stability of Fe 3 O 4 nanofluids for more than 120 h.…”

Section: Surface Modification Of Nanoparticlesmentioning

confidence: 99%

Review and Perspectives of CO₂ Absorption by Water- and Amine-Based Nanofluids

Yuan

¹

,

Wang

²

,

Baena‐Moreno

³

et al. 2023

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The emission of greenhouse gases, especially CO2, has become a major cause of environmental degradation, and carbon capture, utilization, and storage (CCUS) is a proposed solution to mitigate its impact. Nanofluids, a relatively new method for CO2 absorption, have gained attention in recent years. This review focuses on conventional methods for preparing nanofluids along with techniques to improve their stability and enhance the CO2 absorption and desorption mechanisms. Additionally, the influences of factors, i.e., nanoparticle and base solution types as well as nanoparticle concentration, on the CO2 absorption process are summarized. Furthermore, models that can predict the absorption of CO2 accurately are outlined. It is found that the types of both base liquids and nanoparticles have an important impact on the absorption by nanofluids. In-depth studies on the predictive capabilities of artificial intelligence (AI) models hold immense potential in this regard. This review also puts forth effective strategies to address prevailing challenges. This will provide a solid theoretical basis for this field and underscore the promising potential of nanofluids as CO2 solvents. There are still many unexplored aspects to be considered, such as the economic viability and energy consumption of this technology.

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“…This makes SDS highly effective in stabilizing MWCNTs within the oil phase by employing electrostatic and steric stabilization mechanisms. SDS's compatibility with both MWCNTs and crude oil makes it a preferred surfactant choice for creating stable nano uids [38][39][40]. The MWCNTs to SDS surfactant ratio is a critical factor in nano uid preparation, in uencing dispersion, stability, and thermophysical properties.…”

Section: Introductionmentioning

confidence: 99%

Tailored Nanofluid Formulations: Enhancing Crude Oil Thermophysical Properties for Improved EOR Processes through MWCNTs and SDS Integration

Bagheri,

Mousavi,

Nami

et al. 2023

Preprint

View full text Add to dashboard Cite

This research delved into the effects of introducing multi-walled carbon nanotubes (MWCNTs) and sodium dodecyl sulfate (SDS) into crude oil with an anionic base, aiming to enhance its thermophysical attributes in the EOR process. The investigation encompassed a range of properties, including interfacial tension, viscosity, density, and electrical conductivity, measured using an LV rheometer with spindle 18. Various ratios of MWCNTs and SDS were mixed with the crude oil to evaluate their impacts. The study uncovered that the 1:1 ratio of MWCNTs to SDS achieved a noteworthy 10% reduction in interfacial tension while minimally affecting viscosity, showing promise for practical applications. Temperature had diverse effects on viscosity and interfacial tension, displaying fluctuating trends. The highest observed result was a substantial 190% viscosity increase at 40°C with a 2:1 ratio, whereas the lowest was a slight − 0.81% density change at 60°C for the 1:1 ratio. Additionally, interfacial tension consistently decreased over time for all ratios at various temperatures, with the most significant reductions observed at 40°C and 60°C, particularly for the 1:2 and 1:1 ratios. Furthermore, adding MWCNTs and SDS led to a remarkable drop in electrical conductivity, indicating a substantial decrease in salt content within the crude oil. However, it was noted that higher MWCNT concentrations might not be cost-effective, emphasizing the importance of optimizing additive ratios for a balance between performance and economic viability. This study highlights the potential of tailored nanofluid formulations to improve the thermophysical properties of crude oil, potentially enhancing extraction and refining processes.

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Effect of surfactants on the stability, rheological properties, and thermal conductivity of Fe3O4 nanofluids

Cited by 32 publications

References 30 publications

A Comprehensive Study on MWCNTs and SDS Integration in Anionic Crude Oil for Enhanced EOR Processes

A Comprehensive Study on MWCNTs and SDS Integration in Anionic Crude Oil for Enhanced EOR Processes

Review and Perspectives of CO₂ Absorption by Water- and Amine-Based Nanofluids

Tailored Nanofluid Formulations: Enhancing Crude Oil Thermophysical Properties for Improved EOR Processes through MWCNTs and SDS Integration

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Effect of surfactants on the stability, rheological properties, and thermal conductivity of Fe3O4 nanofluids

Cited by 32 publications

References 30 publications

A Comprehensive Study on MWCNTs and SDS Integration in Anionic Crude Oil for Enhanced EOR Processes

A Comprehensive Study on MWCNTs and SDS Integration in Anionic Crude Oil for Enhanced EOR Processes

Review and Perspectives of CO2 Absorption by Water- and Amine-Based Nanofluids

Tailored Nanofluid Formulations: Enhancing Crude Oil Thermophysical Properties for Improved EOR Processes through MWCNTs and SDS Integration

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Product

Resources

About

Review and Perspectives of CO₂ Absorption by Water- and Amine-Based Nanofluids