Experimental and emulational study on the role of ion in coal adsorbing kerosene: Water–kerosene interface and catenoid characteristics

Zhang, Yong; Zhu, Hongzheng; Zhu, Jinbo; Yang, Fan; He, Hailing; Qin, Zhiqian; Shi, Qinghui; Pan, Gaochao

doi:10.1016/j.fuel.2021.120540

Cited by 12 publications

(5 citation statements)

References 45 publications

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“…An individual kerosene droplet was generated at the bottom of the tank via a capillary connecting to the LSP02‐2A type micro syringe pump. To brighten the kerosene generation process, an oil paper and light source were used in the experiment 22 . A high‐speed motion acquisition system was used to record and analyze the characteristics of the kerosene droplet.…”

Section: Methodsmentioning

confidence: 99%

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Effect of inevitable ions on kerosene droplet formation and evolution

Zhang,

Zhu,

et al. 2024

J of Chemical Tech & Biotech

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Understanding the effect of ions on collector generation characteristics is crucial for adjusting the oil/water interface and enhancing mineral flotation. We conducted a study of kerosene droplet generation process in the presences of NaCl, MgCl2 and AlCl3 using the high‐speed motion acquisition system. The results showed that the generation process of kerosene droplet could be divided into two stages that droplet expansion and column contraction according to the variation of the droplet width. With the increasing capillary inner diameter, the generation time of the kerosene droplet increased while the w/h value (column width/column height) of the kerosene column decreased. Until the w/h value decreased to 0, the droplet column ruptured and the droplet separated from the capillary. As the ion valence increased, the equivalent diameter (d) of the kerosene droplet increased due to the ionic hydration and followed the order dAl3+ > dMg2+ > dNa+. Furthermore, as the ion concentration increased, the equivalent diameter increased with the same capillary inner diameter, and the w/h value decreased. A model of the kerosene column height and capillary inner diameter (R) was established to predict the characteristics of the generating kerosene droplet.This article is protected by copyright. All rights reserved.

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Section: Methodsmentioning

confidence: 99%

“…To brighten the kerosene generation process, an oil paper and light source were used in the experiment. 22 A high-speed motion acquisition system was used to record and analyze the characteristics of the kerosene droplet.…”

Section: System and Measurementsmentioning

confidence: 99%

Effect of inevitable ions on kerosene droplet formation and evolution

Zhang,

Zhu,

et al. 2024

J of Chemical Tech & Biotech

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Section: Ftir Analysismentioning

confidence: 99%

“…FTIR is an effective method to characterize and detect molecular clusters and agent adsorption, which is often used to study the mechanism of agent action on minerals (Zhang et al,2021).Figure 6 is the spectrum of PASP. As shown in Figure 6, there was a strong and broad absorption peak at 3454.56 cm -1 , which was due to the stretching vibration of the N-H bond on the amide group .…”

Section: Ftir Analysismentioning

confidence: 99%

Flotation separation of dolomite and apatite using polyaspartic acid as inhibitor

Kang

Zhang

2021

Physicochem. Probl. Miner. Process.

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In this paper, polyaspartic acid (PASP) was exploited as a novel dolomite depressant for flotation separation of apatite and dolomite. A series of tests with Zeta potential, FTIR and XPS were used to reveal the inhibitory mechanism of PASP on dolomite. The microflotation test illustrated that PASP has a strong inhibitory impact on dolomite, and little effect on the floatability of apatite in the pH range of 9-11. When using 2.7 Mg/L PASP as the depressant under sodium oleate (NaOl) system, the flotation recovery of dolomite dropped dramatically to 9.95%, and the recovery of apatite remained at about 88.27% at pH 10. Both dolomite and apatite have calcium ion on the surface. The calcium ion on the surface of apatite were strongly inhibited and repelled by the localized anions, while the important role on the surface of dolomite was positively charged magnesium ion and localized calcium species. PASP could ionize carboxylate ion under alkaline conditions, which could chemically chelate with the exposed metal ion and be adsorbed on the surface of dolomite. And then prevent the further adsorption of NaOl onto dolomite, which greatly weaken the floatability of dolomite and enhanced the flotation separation of the two minerals.

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“…They found that the hypersaline reduced the surface tension between coal particles and air bubbles. Zhang et al [24] studied the effect of different ions on interfacial tension between water and kerosene and found that the surface tension decreased with the increasing salt concentration. Ni et al [25] studied the effect of NaCl-SDS compound solution on the wetting performance of coal.…”

Section: Introductionmentioning

confidence: 99%

Physical and Mechanical Properties Evolution of Coal Subjected to Salty Solution and a Damage Constitutive Model under Uniaxial Compression

et al. 2021

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Many underground reservoirs for storing water have been constructed in China’s western coal mines to protect water resources. Coal pillars which work as dams are subjected to a long-term soaking environment of concentrated salty water. Deterioration of the coal dam under the attack of the salty solution poses challenges for the long-term stability and serviceability of underground reservoirs. The evolution of the physical and mechanical properties of coal subjected to salty solutions are investigated in this paper. Coal from a western China mine is made to standard cylinder samples. The salty solution is prepared according to chemical tests of water in the mine. The coal samples soaked in the salty solution for different periods are tested by scanning electron microscope, nuclear magnetic resonance, and ultrasonic detector techniques. Further, uniaxial compression tests are carried out on the coal specimens. The evolutions of porosity, mass, microstructures of coal, solution pH values, and stress–strain curves are obtained for different soaking times. Moreover, a damage constitutive model for the coal samples is developed by introducing a chemical-stress coupling damage variable. The result shows that the corrosion effect of salty solution on coal samples becomes stronger with increasing immersion time. The degree of deterioration of the longitudinal wave velocity (vp) is positively correlated with the immersion time. With the increase in soaking times, the porosity of coal gradually increases. The relative mass firstly displays an increasing trend and then decreases with time. The peak strength and elastic modulus of coal decreases exponentially with soaking times. The developed damage constitutive model can well describe the stress–strain behavior of coal subjected to salty solution under the uniaxial compression.

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Experimental and emulational study on the role of ion in coal adsorbing kerosene: Water–kerosene interface and catenoid characteristics

Cited by 12 publications

References 45 publications

Effect of inevitable ions on kerosene droplet formation and evolution

Effect of inevitable ions on kerosene droplet formation and evolution

Flotation separation of dolomite and apatite using polyaspartic acid as inhibitor

Physical and Mechanical Properties Evolution of Coal Subjected to Salty Solution and a Damage Constitutive Model under Uniaxial Compression

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