Simulation of forward osmosis process: Modification of mass transfer coefficient and osmotic pressure equations

Bahoosh, Mohsen; Shokrollahzadeh, Soheila; Kashi, Eslam; Rostami, Khosrow

doi:10.1016/j.jece.2021.106698

Cited by 7 publications

(2 citation statements)

References 42 publications

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“…This method is reliable for applications in low-concentration solutions. Meanwhile, π can be briefly calculated by eq when the draw solute is NaCl and the concentration is comparatively high in water solution, and m NaCl is the mass fraction of the NaCl salt. , π = italicRT ∑ C i π = 8.05 × 10 7 m NaCl + 4.83 × 8.05 × 10 7 m NaCl 3 …”

Section: Methodsmentioning

confidence: 99%

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Study of Forward Osmosis Process and its Effects on the Concentration of Salt Lake Brine

Li,

Zhao

et al. 2024

Ind. Eng. Chem. Res.

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Separation and concentration are two indispensable technical components of the gradient-coupling membrane technique for the extraction of valuable resources from salt lake brine. Herein, we systematically studied the forward osmosis (FO) process and its effects on the concentration of salt lake brine. First, the chemical composition, structure, and surface properties of both sides of the FO membrane were characterized and analyzed. We then deeply probed the effect of operating conditions and the properties of the draw solution on the water flux and ion transport, according to the experimental results and mathematical models. Moreover, the hypersaline NaCl solution and the old brine (salt lake brine after potassium precipitation) were applied as the draw solutions to concentrate the separated brine (salt lake brine after nanofiltration membrane separation). It was shown that the surface structure and concentration polarization of the membrane obviously affected the water flux and reverse salt transport, while the high concentration of the draw solution simultaneously caused a large osmotic pressure, resulting in a large water flux and reverse salt transport. In addition, the water fluxes reached 18.28 L•m −2 •h −1 (NaCl) and 29.78 L•m −2 •h −1 (the old brine), and the enrichment ratios for Li + were 1.98 and 4.78, respectively. This study further advances the application of FO membranes in the development of salt lake resources and also contributes to the technical support of the brine concentration part of the membrane-coupling process.

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Section: Methodsmentioning

confidence: 99%

“…Meanwhile, π can be briefly calculated by eq 13 when the draw solute is NaCl and the concentration is comparatively high in water solution, and m NaCl is the mass fraction of the NaCl salt. 55,56 = RT C i…”

Section: Concentration Process Of the Separated Brinementioning

confidence: 99%

Study of Forward Osmosis Process and its Effects on the Concentration of Salt Lake Brine

Li,

Zhao

et al. 2024

Ind. Eng. Chem. Res.

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Pilot‐Scale Evaluation of Spiral‐Wound Modules in Osmotically Assisted Reverse Osmosis

Turetta,

Bertucco,

Briani

et al. 2024

Chem Eng & Technol

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The osmotically assisted reverse osmosis (OARO) process is gaining attention for cost‐effective aqueous solution concentration. However, there is a lack of pilot‐scale studies. This research used two spiral‐wound modules in a pilot‐scale plant. The first one, an adapted commercial reverse osmosis module, showed no positive results, likely due to excessive membrane thickness and high internal concentration polarization. In contrast, the second one consisting of a novel forward osmosis prototype demonstrated promising outcomes, achieving water fluxes exceeding 2 L m−2 h−1 even at high salt concentrations (50 g L−1) and relatively low applied pressures (above 12 bar). The study highlights OARO potential, underscores limitations, and emphasizes the need for dedicated module design.

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The side stream and different spacers effects on the permeate water flux in forward osmosis process using computational fluid dynamics

Bahoosh

Kashi²,

Shokrollahzadeh³

2022

Chemical Engineering and Processing - Process Intensification

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Simulation of forward osmosis process: Modification of mass transfer coefficient and osmotic pressure equations

Cited by 7 publications

References 42 publications

Study of Forward Osmosis Process and its Effects on the Concentration of Salt Lake Brine

Study of Forward Osmosis Process and its Effects on the Concentration of Salt Lake Brine

Pilot‐Scale Evaluation of Spiral‐Wound Modules in Osmotically Assisted Reverse Osmosis

The side stream and different spacers effects on the permeate water flux in forward osmosis process using computational fluid dynamics

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