Adsorption behavior of welan gum on quartz sand in reservoir

Fu, Lipei; Jiang, Lujun; Ke-jian, Liao; An, Junnan; Huang, Weiqiu; Sun, Xianhang; Li, Tong; He, Yanfeng

doi:10.1016/j.petrol.2021.108850

Cited by 9 publications

(2 citation statements)

References 17 publications

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“…In addition, when the pH value is in the range of 7-12, the adsorption capacity decreases gradually, and the decrease rate is larger than that in the acidic environment [33]. The reason is that both the montmorillonite and the welan gum are negatively charged, so the adsorption capacity is reduced due to electrostatic repulsion [35].…”

Section: Effect Of Ph Valuementioning

confidence: 98%

“…So, it is necessary to clarify the adsorption law of welan gum on reservoir rocks. As for the adsorption and retention of welan gum on reservoir rocks, Fu et al studied its adsorption on quartz sand [33]. As another major component of reservoir rocks, montmorillonite is a common clay mineral in reservoir, but the adsorption of welan gum on montmorillonite has not been reported yet.…”

Section: Ji Et Al[20] Welan Gummentioning

confidence: 99%

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Adsorption of Welan Gum on Montmorillonite and Its Influencing Factors

Ke-jian

et al. 2022

Polymers

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Welan gum is one of the most promising polymers used in polymer flooding for enhancing oil recovery, due to its excellent temperature resistance and salt-tolerance performance. However, welan gum, as a polymer with higher molecular weight, can be adsorbed and detained in the pore throat of the reservoir, which is characterized by a smaller size. Montmorillonite, a kind of clay mineral with high content in reservoir rocks, has strong adsorption capacity. Therefore, the adsorption behavior of welan gum on montmorillonite, as well as its influencing factors, are studied in this paper. The results show that the adsorption capacity is 2.07 mg/g. The adsorption capacity decreased with the increase in temperature. Both acidic and alkaline conditions reduced the adsorption capacity. The existence of inorganic salt affected the adsorption capacity. In addition, the higher the cation value, the lower the adsorption capacity. The characterization tests showed that the adsorption of welan gum on montmorillonite was characterized by physical adsorption and surface adsorption, indicating that there were no changes in the internal structure of montmorillonite. This study provides feasible methods to reduce the amount of welan gum adsorbed on montmorillonite, which is of great significance for reducing the permeability damage caused by welan gum adsorption and promoting the application of welan gum in polymer flooding for enhancing oil recovery.

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Section: Effect Of Ph Valuementioning

confidence: 98%

Section: Ji Et Al[20] Welan Gummentioning

confidence: 99%

Adsorption of Welan Gum on Montmorillonite and Its Influencing Factors

Ke-jian

et al. 2022

Polymers

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Magnetic Fe2O3/biochar composite prepared in a molten salt medium for antibiotic removal in water

Liang

Zhu

et al. 2022

Biochar

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The large-scale use of antibiotics is causing serious water pollution problems, and it is of great significance to develop new technologies to remove antibiotics from water. As an environmentally friendly and economical adsorption material, carbon derived from biomass is a low-cost and feasible material for removing antibiotics in sewage, but the current removal efficiencies are not high enough for large-scale practical application. In this study, poplar wood chips are used as raw material, and a magnetic biochar is prepared by co-pyrolysis of poplar wood chips and FeCl3/CaCl2 mixed molten salt. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), N2-isothermal adsorption and desorption, X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM) techniques showed the successful synthesis of Fe2O3/bioC composite. In-situ formed Fe2O3 makes the biochar possess the characteristic of superparamagnetic, which is conducive to the recycling of biochar. Due to the etching effect of the molten salts, rough surface was formed on Fe2O3/bioC, resulting in a maximum norfloxacin (NOR) adsorption ability up to 38.77 mg g−1 at pH 6.0. The NOR adsorption behavior on Fe2O3/bioC followed the pseudo second order kinetic model and the equilibrium data was best fitted the Langmuir model. In addition, the adsorption process of NOR on Fe2O3/bioC was thermodynamically spontaneous. The results show that this low-cost and reusable magnetic biochar has the potential for rapid and efficient removal of antibiotic from aqueous solution.

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Construction of quartz sand@g-C3N4/CoFe-LDH core/shell heterostructures for boosted visible-light driven photothermal-assisted photocatalytic wastewater purification

Li,

Tang

et al. 2024

Applied Surface Science

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Adsorption behavior of welan gum on quartz sand in reservoir

Cited by 9 publications

References 17 publications

Adsorption of Welan Gum on Montmorillonite and Its Influencing Factors

Adsorption of Welan Gum on Montmorillonite and Its Influencing Factors

Magnetic Fe2O3/biochar composite prepared in a molten salt medium for antibiotic removal in water

Construction of quartz sand@g-C3N4/CoFe-LDH core/shell heterostructures for boosted visible-light driven photothermal-assisted photocatalytic wastewater purification

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