The study of elongation and shear rates in spinning process and its effect on gas separation performance of Poly(ether sulfone) (PES) hollow fiber membranes

Cao, Chun; Chung, Tai‐Shung; Chen, Shing Bor; Dong, ZhengJun

doi:10.1016/j.ces.2003.10.023

Cited by 86 publications

(65 citation statements)

References 31 publications

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Section: Effect Of Various Flow Angles On the Shear Rate For Real Consupporting

confidence: 89%

“…The analytical and simulation predictions are in good agreement with the calculations by Cao et al 24 and Shilton. 22 In addition, we observe that the shear rates calculated using the method of Cao et al 24 are in good agreement with those predicted by Shilton. 22 In the study of Cao et al, 24 the results showed that the simulation predictions disagreed with the data of Shilton 22 for n ¼ 0.7026, which is the inverse of 1.423.…”

Section: Effect Of Various Flow Angles On the Shear Rate For Real Consupporting

confidence: 89%

“…To confirm the validity of the theoretical analysis, the analytical solutions were compared with the work by Cao et al 24 and Shilton. 22 The geometry of the real conical spinneret used in the study of Cao et al 24 is shown in Figure 3.…”

Section: Effect Of Various Flow Angles On the Shear Rate For Real Conmentioning

confidence: 96%

“…22 The geometry of the real conical spinneret used in the study of Cao et al 24 is shown in Figure 3. The rheological properties of the dope solution can be described using the power-law expression: Figure 7 shows a comparison between the analytical solutions and the CFD simulations for the shear-rate distribution in a real conical spinneret for a flow angle of 90…”

Section: Effect Of Various Flow Angles On the Shear Rate For Real Conmentioning

confidence: 99%

“…Computational fluid dynamic (CFD) methods have been widely used in the membrane module design. [24][25][26][27][28][29] Cao et al 24 were the first to use CFD methods to simulate the flow profile of a doped solution in a spinneret having three different flow angles. The shear and elongation rates at the spinneret outlet were analyzed.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Power‐law polymer solution flow in a converging annular spinneret: Analytical approximation and numerical computation

Tung¹,

Li²,

Hu³

et al. 2011

AIChE Journal

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A simplified analytical solution for the flow of power-law liquids through a conical annulus was derived to estimate the flow profile, wall shear rate, and elongation rate in the spinneret during the spinning of hollow fiber membranes. The velocity profiles and shear and elongation rates of the power-law fluid showed good agreement with those obtained from computational fluid dynamic simulations. Although the actual spinneret is characterized by an annulus with a converging cross section, most studies to date have used a geometrical concentric annulus for the sake of simplicity. The results of the current work indicate that neglecting the converging characteristics of the actual spinneret can lead to significant underestimation of the wall shear rate. Using the equations derived in our work, we were able to predict not only the velocity profile but also the wall shear rate and the elongation rate; the influence of the spinneret design on the membrane morphology and properties were also examined.

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Section: Effect Of Various Flow Angles On the Shear Rate For Real Consupporting

confidence: 89%

Section: Effect Of Various Flow Angles On the Shear Rate For Real Consupporting

confidence: 89%

Section: Effect Of Various Flow Angles On the Shear Rate For Real Conmentioning

confidence: 96%

Section: Effect Of Various Flow Angles On the Shear Rate For Real Conmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Power‐law polymer solution flow in a converging annular spinneret: Analytical approximation and numerical computation

Tung¹,

Li²,

Hu³

et al. 2011

AIChE Journal

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Membrane Technology

Bruggen

2017

Kirk-Othmer Encyclopedia of Chemical Technology

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Membrane separation is based on selective transport through the membrane. Increasingly, membrane technology has developed and is currently being used in a broad range of industrial applications. This article provides an overview of the fundamentals of membrane technology, the fabrication of various membranes, and the use of membranes in scaled‐up modules of various geometries for industrial applications. Different membrane processes are introduced: (i) microfiltration and ultrafiltration; (ii) nanofiltration and reverse osmosis (extended to forward osmosis); (iii) pervaporation, as stand‐alone processes or in hybrid configuration and in membrane reactors; (iv) dialysis, particularly for medical use; (v) electrodialysis and derived processes using selective or bipolar membranes; (vi) gas permeation for hydrogen and carbon dioxide separation. The use of membranes in energy‐related applications includes the development of pressure‐retarded osmosis, reverse electrodialysis, fuel cells, and microbial fuel cells. The emerging use of membrane contactors (membrane distillation, membrane absorption) is described as a combination of a classical separation, enhanced with membranes to improve drastically the mass transfer.

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Fabrication of Hollow‐Fiber Membranes by Phase Inversion

Chung

2008

Advanced Membrane Technology and Applications

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The study of elongation and shear rates in spinning process and its effect on gas separation performance of Poly(ether sulfone) (PES) hollow fiber membranes

Cited by 86 publications

References 31 publications

Power‐law polymer solution flow in a converging annular spinneret: Analytical approximation and numerical computation

Power‐law polymer solution flow in a converging annular spinneret: Analytical approximation and numerical computation

Membrane Technology

Fabrication of Hollow‐Fiber Membranes by Phase Inversion

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