Influence of surfactants on thermal performance of Al2O3/water nanofluids in a two-phase closed thermosyphon

Baek, Seungyeop; Shin, Dongwook; Noh, Jungpil; Choi, Byeong-Keun; Huh, Sun-Chul; Jeong, Hyomin; Sung, Youl-Moon

doi:10.1016/j.csite.2021.101586

Cited by 8 publications

(6 citation statements)

References 47 publications

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“…The adsorption of molecules into alumina from aqueous and nonaqueous solutions is of significant biological and environmental value. Alumina is not a monotropic form; it is an oxide mixture that contains alkali or alkaline earth atoms. − Alumina is a promising adsorbent that could be utilized for carbon nanotube surface modifications. − The preparation conditions, such as heating and/or the presence of surfactant drying materials, highly influence their structure, surface properties, and performance. − In addition, sodium dodecyl sulfate (SDS) is reported to enhance the adsorption potential of heavy metal species and dyes when applied to modify adsorbents such as chitosan, carbon materials, magnetic core–shell composites, and/or poly(vinyl) chloride. − Most of reported methods for alumina fabrication use a high thermal processing condition between 600 and 1000 °C. − The low temperature for alumina processing and modification needs more exploration to assess the formed structure and the real field applicability.…”

Section: Introductionmentioning

confidence: 99%

Influence of Synthesis-Heating Conditions on the Porosity and Performance of a Carbon Nanotube/SDS-Alumina Nanocomposite for Effective Wastewater Treatment: Fabrication, Characterization, and Adsorption Modeling

Habila,

ALOthman,

Hakami

et al. 2023

Ind. Eng. Chem. Res.

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Wastewater treatment for the removal of heavy metals can reduce environmental contamination, enable safer industrial activities, and enhance sustainable practices. Efficient materials processing oriented to low temperature operating conditions; thus, the development and modeling of carbon nanotube/SDS-alumina nanocomposite-based adsorbents (CNT/ SDS-alumina) for efficient wastewater treatment are investigated in this work. The optimization of a low temperature-based process is targeted in this work to achieve a cost-effective method for fabrication of CNT/SDSalumina nanocomposites. The fabrication process involves the investigation of various heating conditions in an oven and autoclave with successful optimization for the formation of porous CNT/SDS-alumina nanocomposite-based adsorbents. The fabricated materials were characterized by TEM, SEM, XRD, FTIR, and surface area analysis. The results indicate that the heating condition is the factor controlling the formation of the porous structure of the CNT/SDS-alumina nanocomposite, which affects the wastewater treatment application. The surface area was higher (49.26−51.02 cm 2 /g) for CNT/SDS-alumina nanocomposite-based adsorbents prepared under autoclave heating conditions. The best adsorption capacity values obtained using the CNT/SDS-alumina nanocomposite prepared under autoclave conditions were 463 mg/g for arsenic ions and 418 mg/g for mercury ions, revealing the high efficiency of the prepared materials for the adsorption of pollutants. The adsorption process for the removal of arsenic and mercury is reported to follow the second-order kinetic model. The adsorption data for the CNT/SDS-alumina nanocomposite-based adsorbents prepared under autoclave heating conditions are well fitted with the Langmuir isotherm, suggesting a monolayer adsorption mechanism. Additionally, the prepared CNT/SDS-alumina nanocomposite-based adsorbents are recommended for potential applications involving the adsorption of various heavy metals for real wastewater treatment situations.

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Section: Introductionmentioning

confidence: 99%

Influence of Synthesis-Heating Conditions on the Porosity and Performance of a Carbon Nanotube/SDS-Alumina Nanocomposite for Effective Wastewater Treatment: Fabrication, Characterization, and Adsorption Modeling

Habila,

ALOthman,

Hakami

et al. 2023

Ind. Eng. Chem. Res.

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“…The ability of petroleum contaminants to separate from the particle surface into the free state was related to the oilwater interfacial tension, and the reduction in interfacial tension usually involves the addition of surfactants, [35][36][37] heating, 38,39 the addition of solvents, 40 and the generation of gas bubbles. 41,42 In this study, petroleum hydrocarbon contaminants were removed from sandy soil using the NBs water flushing technology, and the effect of petroleum hydrocarbon removal was reflected by detecting the interfacial tension of oil and water under different flushing conditions.…”

Section: Methodsmentioning

confidence: 99%

Enhanced flushing mechanism of petroleum hydrocarbon contaminated sandy soil by air nano bubbles

Liu,

Xiang,

Yang

et al. 2024

Environ. Sci.: Nano

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“…Typically, all experiment processes create some uncertainty due to various reasons such as zero-stability, calibration, observation, the test environment, and sensor selection [36]. The overall uncertainty in this experiment can be derived from the following equation [37,38]. Figure 5 shows the experimental setup of the cold energy recovery and cold water supply system to the water tank used in this study.…”

Section: Methodsmentioning

confidence: 99%

Liquefied Natural Gas Cold Energy Utilization for Land-Based Cold Water Fish Aquaculture in South Korea

et al. 2022

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A new concept of land-based Atlantic salmon farming utilizing liquefied natural gas (LNG) cold energy is proposed. In this study, laboratory-scale experiments were conducted using liquid nitrogen as a cold energy source to confirm whether the water temperature of a fish farming tank can reach below 17 °C within an hour. In particular, the effects of the mass flow rates of liquid nitrogen (0.0075, 0.01, and 0.0125 kg/s) and water (0.05, 0.1, and 0.15 kg/s) on the cooling performances of water were investigated. The results showed that a higher mass flow rate of liquid nitrogen results in a better water cooling performance. In the case of varying the mass flow rate of liquid nitrogen, it was observed that the mass flow rate of 0.0125 kg/s showed the greatest water temperature difference of 9.10 °C/h, followed by that of 0.01 kg/s (5.88 °C/h), and 0.0075 kg/s (5.06 °C/h). In the case of varying the mass flow rate of water, it was observed that the mass flow rate of 0.05 kg/s showed the most significant water temperature difference of 7.92 °C/h, followed by that of 0.1 kg/s (6.26 °C/h), and 0.15 kg/s (5.53 °C/h). Based on the experimental results of this study and the water cooling heat source by an LNG mass flow rate of 220.5 kg/s, the estimated production capacity of Atlantic salmon was approximately 14,000 tons, which is 36.8% of that of imported salmon in South Korea.

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Influence of surfactants on thermal performance of Al2O3/water nanofluids in a two-phase closed thermosyphon

Cited by 8 publications

References 47 publications

Influence of Synthesis-Heating Conditions on the Porosity and Performance of a Carbon Nanotube/SDS-Alumina Nanocomposite for Effective Wastewater Treatment: Fabrication, Characterization, and Adsorption Modeling

Influence of Synthesis-Heating Conditions on the Porosity and Performance of a Carbon Nanotube/SDS-Alumina Nanocomposite for Effective Wastewater Treatment: Fabrication, Characterization, and Adsorption Modeling

Enhanced flushing mechanism of petroleum hydrocarbon contaminated sandy soil by air nano bubbles

Liquefied Natural Gas Cold Energy Utilization for Land-Based Cold Water Fish Aquaculture in South Korea

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