Optimizing nanofluid additives for enhanced thermophysical properties in anionic crude oil for EOR applications

Abstract

This research delved into the effects of introducing multi‐walled carbon nanotubes (MWCNTs) and sodium dodecyl sulphate (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 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.

Nitrate removal study of synthesized nano γ-alumina and magnetite-alumina nanocomposite adsorbents prepared by various methods and precursors

“…Among adosbents, metal oxides are favorable regarding the elimination of pollutants due to their cost-effectiveness, thermal resistance, and remarkable mechanical properties 37 – 41 . Aluminum oxide (Al 2 O 3 ) or alumina is one of the important oxides which can be in many crystalline structures such as α-Al 2 O 3 , γ-Al 2 O 3 , etc.…”

Investigation into the elimination of nitrates using nano γ-alumina and magnetite-alumina nanocomposite adsorbents synthesized through different methods and precursor materials

“…However, it is imperative to note that experimental parameters such as temperature, precursor type, and reaction time wield considerable in uence over the aforementioned material characteristics 30,[34][35][36] . Among adosbents, metal oxides are favorable regarding the elimination of pollutants due to their costeffectiveness, thermal resistance, and remarkable mechanical properties [37][38][39][40][41] . Aluminum oxide (Al 2 O 3 ) or alumina is one of the important oxides which can be in many crystalline structures such as α-Al 2 O 3 , γ-Al 2 O 3 , etc.…”

Insights into two-phase flow dynamics in closed-loop pulsating heat pipes utilizing Fe3O4/water: experimental visualization study

“…Various nanosized materials have been incorporated into base fluids to create high-heat transfer property nanofluids. Among these, metal oxide nanoparticles like alumina, iron oxide, and copper oxide are commonly employed in nanofluid preparation because they maintain stable dispersion in the base fluid 27 – 31 . Iron oxide (Fe 3 O 4 ) nanoparticles are applied as nanofluids in PHPs due to their advantages, including high thermal conductivity, excellent stability, magnetic properties, and the ability to reduce thermal resistance 32 – 38 .…”