Ceramic membranes with mussel-inspired and nanostructured coatings for water-in-oil emulsions separation

Gao, Nengwen; Xu, Zhi‐Kang

doi:10.1016/j.seppur.2018.11.084

Cited by 65 publications

(18 citation statements)

References 40 publications

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“…Notably, the order of permeance recovery rate of the nanofiber membranes is consistent with the order of the lipophilicity of the nanofiber membranes, indicating that the fouling resistance of the nanofiber membranes positively correlates with the lipophilicity of the membranes. Higher lipophilicity of the membranes leads to a higher repulsion toward water droplets, which are the main foulants of the superhydrophobic membranes for the separation of water droplets from water-in-oil emulsions. ,, Excitingly, our PVDF- co -PDMS-AS membranes are much more permeable than the state-of-the-art membranes reported previously when removing water droplets with particle sizes above 200 nm from the emulsions completely (Figure e) . − ,− With the high emulsion permeance, high separation efficiency, and high antifouling performance, the PVDF- co -PDMS membranes show strong promise in various industries related to oil refining.…”

Section: Resultsmentioning

confidence: 81%

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Constructing Scalable Superhydrophobic Membranes for Ultrafast Water–Oil Separation

et al. 2021

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Superhydrophobic membranes are desirable for separation of water-in-oil emulsions, membrane distillation, and membrane condensation. However, the lack of large-scale manufacture methods of superhydrophobic membranes hampers their widespread applications. Here, a facile method of coaxial electrospinning is provided to manufacture superhydrophobic membranes for the ultrafast separation of waterin-oil emulsions. Under the high-voltage electric field, the polydimethylsiloxane (PDMS)-coated polyvinylidene fluoride (PVDF) nanofibers and PDMS microspheres with PVDF nanobulges were integrated together during the electrospinning process. Moreover, asymmetric composite membranes with selective layers are designed to reduce the resistance of the mass transfer. Consequently, the as-prepared asymmetric composite membrane exhibits an ultrafast permeance and excellent separation efficiency of about 99.6%, outperforming most of the state-of-the-art membranes reported previously. Most importantly, the membrane could be as large as 770 cm 2 , could be manufactured continuously, and could be easily enlarged further via tailoring the roller receptor, showing strong promise in the separation of water-in-oil emulsions.

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Section: Resultsmentioning

confidence: 81%

“…(d) Change of the permeance with increasing cycle number. (e) Comparison of the separation performance between the as-prepared membrane in this work and those reported in literature. − ,− …”

Section: Resultsmentioning

confidence: 84%

Constructing Scalable Superhydrophobic Membranes for Ultrafast Water–Oil Separation

et al. 2021

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“…Cyclic aromatic hydrocarbon as the main component in FCC slurry oil can be used to produce needle coke, carbon fiber, carbon black, rubber softener and filler oil, plastic plasticizer, asphalt, and other chemical products [8][9][10][11]. But the particulate matter in the slurry oil should be removed for recycling and reuse.…”

Section: Introductionmentioning

confidence: 99%

Purification of fluid catalytic cracking slurry oil at room temperature using ceramic membrane

Han¹,

Lou²,

Li³

et al. 2022

Mater. Res. Express

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The catalyst particles were removed from fluid catalytic cracking (FCC) slurry oil by two-step separation processing. FCC slurry oil was mixed with water and surfactant to make the lower viscosity emulsion. The catalyst particles were removed from the emulsion using the modified hydrophobic ceramic membrane (0.1μm) and then the water was filtered out from oil/water emulsion using an unmodified hydrophilic ceramic membrane (0.05μm) at room temperature. The separation efficiency of catalyst particles and emulsion reached 99.9% and the oil/water separation efficiency also reached 99.9%. FCC slurry oil was effectively purified at room temperature by a two-step treatment.

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“…Porous ceramic materials have been widely studied in the last years due to its high potential in applications such as: filters 1-3 , catalysis 4,5 , membranes [6][7][8] and bioceramics 9,10 . The high mechanical resistance, low thermal conductivity and considerable chemistry stability of ceramic materials make them ideal for harsher conditions frequently used on industrial applications 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Tubular Freeze-Cast Substrates with Organized Pore Structure

2021

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Despite the high potential of the freeze-casting technique for production of porous inorganic substrates, there is a lack of studies on tubular geometries and their mechanical behavior under different pressure scenarios. In this work, the mechanical behavior of tubular freeze-cast alumina substrates was assessed by mathematical models from experimental O-ring tests. The stress distributions revealed a concentration of tensile stresses (within 0.2-25.0 MPa) on the plane of the load, causing brittle fracture. Furthermore, the results confirmed that the honeycomb model for brittle material adequately predicted the mechanical strength of the tubular freeze-cast substrates. Finally, fracture criteria from honeycomb model was used to estimate the maximum homogeneously distributed pressures, such as in fluids, that the substrates can withstand. This configuration represents more precisely practical conditions, though is hard to experimentaly replicate. Therefore, the developed procedure is paramount to simulate the mechanical behaviour of the tubular freeze-cast substrates under real operating conditions.

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Ceramic membranes with mussel-inspired and nanostructured coatings for water-in-oil emulsions separation

Cited by 65 publications

References 40 publications

Constructing Scalable Superhydrophobic Membranes for Ultrafast Water–Oil Separation

Constructing Scalable Superhydrophobic Membranes for Ultrafast Water–Oil Separation

Purification of fluid catalytic cracking slurry oil at room temperature using ceramic membrane

Mechanical Behavior of Tubular Freeze-Cast Substrates with Organized Pore Structure

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