Predicting the performance of spiral-wound membranes in pressure-retarded osmosis processes

Matta, Saly; Selam, Muaz A.; Manzoor, Husnain; Adham, Samer; Shon, Ho Kyong; Castier, Marcelo; Abdel‐Wahab, Ahmed

doi:10.1016/j.renene.2022.02.125

Cited by 10 publications

(3 citation statements)

References 38 publications

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“…Several studies numerically investigated the performance of an SWM [62,[66][67][68][69]. The reported power density values of these studies were noticed to be higher compared with the experimental results.…”

Section: Spiral Wound Module (Swm)mentioning

confidence: 99%

“…The reported power density values of these studies were noticed to be higher compared with the experimental results. Matta et al [66] numerically investigated the performance of an SWM with a membrane area of 30 m 2 , assuming a linear pressure drop across the length of the membrane. Although the results of their numerical analysis were validated against experimental data of a flat sheet module with an area of 20 cm 2 , their obtained power density was overestimated compared with the experimental results obtained by Kim et al [29] for the same SWM.…”

Section: Spiral Wound Module (Swm)mentioning

confidence: 99%

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Challenges Facing Pressure Retarded Osmosis Commercialization: A Short Review

Abdelkader

Sharqawy

2022

Energies

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Pressure-retarded osmosis (PRO) is a promising technology that harvests salinity gradient energy. Even though PRO has great power-generating potential, its commercialization is currently facing many challenges. In this regard, this review highlights the discrepancies between the reported power density obtained by lab-scale PRO systems, as well as numerical investigations, and the significantly low power density values obtained by PRO pilot plants. This difference in performance is mainly due to the effect of a pressure drop and the draw pressure effect on the feed channel hydrodynamics, which have significant impacts on large-scale modules; however, it has a minor or no effect on small-scale ones. Therefore, this review outlines the underlying causes of the high power density values obtained by lab-scale PRO systems and numerical studies. Moreover, other challenges impeding PRO commercialization are discussed, including the effect of concentration polarization, the solution temperature, the pressure drop, and the draw pressure effect on the feed channel hydrodynamics. In conclusion, this review sheds valuable insights on the issues facing PRO commercialization and suggests recommendations that can facilitate the successful development of PRO power plants.

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Section: Spiral Wound Module (Swm)mentioning

confidence: 99%

Section: Spiral Wound Module (Swm)mentioning

confidence: 99%

Challenges Facing Pressure Retarded Osmosis Commercialization: A Short Review

Abdelkader

Sharqawy

2022

Energies

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“…Since the objective of this study is to demonstrate the feasibility of scaling-up novel reinforced membranes to the module level, we selected the standard spiral-wound module configuration for scale-up testing. A smaller leaf set thickness is critical for the fabrication of low-energy spiral-wound modules (SWMs) for many pressure-driven and thermal-driven membrane applications, such as reverse osmosis [ 16 ], membrane distillation [ 17 ], and pressure-retarded osmosis [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Development and Industrial-Scale Fabrication of Next-Generation Low-Energy Membranes for Desalination

Goh

Thong

et al. 2022

Membranes

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Spiral-wound modules have been the most common configuration of packing flat-sheet membranes since the early development of polyamide (PA) membranes for water treatment applications. Conventional spiral-wound modules (SWMs) for desalination applications typically consist of several leaf sets, with each leaf set comprising feed spacers, membranes, and a permeate carrier (PC) wrapped around a permeate-collecting tube. The membrane area that can be packed into a given module diameter is limited by the overall leaf set thickness, restricting module productivity for a given membrane permeability. We describe here a novel industrial-scale method for successfully coating the polysulfone (PSf) ultrafiltration (UF) support layer directly onto a permeate carrier, instead of conventional non-woven fabric, as a precursor to the polyamide TFC coating, resulting in twofold benefits: (a) drastically simplifying the membrane fabrication process by eliminating the use of non-woven fabric and (b) increasing the throughput of each membrane module by facilitating the packing of a larger membrane area in a standard module housing. By combining the permeate carrier and membrane into a single sheet, the need for the non-woven support layer was eliminated, leading to a significantly reduced leaf set thickness, enabling a much larger membrane area to be packed in a given volume, leading to lower energy consumption per cubic meter of produced water. Molecular-weight cutoff (MWCO) values in the range of 36–96 kDa were found to be dependent on PC thickness and material. Nevertheless, the reinforced membranes were successfully fabricated with a ~9% reduction in membrane leaf thickness compared to a conventional membrane. Preliminary trials of coating a thin-film composite PA layer resulted in defect-free reverse osmosis (RO) membranes with a salt rejection of 94% and a flux of 40 L m−2 h−1 when tested against a 2000 mg/L NaCl feed solution at an operating pressure of 15 bar. Results from the testing of the 1812 and 2514 elements validated the novel concept and paved the way for further improvements towards full-scale RO membranes with the potential to be the next low-energy workhorse of the water industry.

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Review of analytical and numerical modeling for pressure retarded osmosis membrane systems

Liang

2023

Desalination

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Predicting the performance of spiral-wound membranes in pressure-retarded osmosis processes

Cited by 10 publications

References 38 publications

Challenges Facing Pressure Retarded Osmosis Commercialization: A Short Review

Challenges Facing Pressure Retarded Osmosis Commercialization: A Short Review

Development and Industrial-Scale Fabrication of Next-Generation Low-Energy Membranes for Desalination

Review of analytical and numerical modeling for pressure retarded osmosis membrane systems

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