The effect of shell side hydrodynamics on the performance of axial flow hollow fibre modules

Costello, Michael J.; Fane, A.G.; Hogan, Patrick A.; Schofield, R.W.

doi:10.1016/0376-7388(93)85127-i

Cited by 249 publications

(164 citation statements)

References 14 publications

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“…Also, the end effects of introducing the shell-side fluid perpendicularly to the fibre bundle may persist over longer lengths. Finally, Costello et al (1993) obtained Sherwood numbers for φ, a/L and Re values that are comparable with the values considered by Prasad & Sirkar (1988) but obtained much higher values of Sherwood numbers. They also measured the shell-side pressure drop and found it to increase more rapidly with the velocity than predicted by laminar flow.…”

Section: Comparison With Experimentssupporting

confidence: 86%

“…The most commonly cited correlations for Sh in hollow-fibre contactors are due to Yang & Cussler (1986), Prasad & Sirkar (1988), and Costello et al (1993). Yang & Cussler (1986) carried out experiments for φ = 0.03, 0.26, and 0.4 but summarized the results in their table 2 for only φ = 0.03 and 0.4.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

“…The fibres are also flexible and often not parallel to each other. These differences have prompted several investigators to measure mass transfer coefficients in hollow-fibre modules in recent years (Yang & Cussler 1986;Prasad & Sirkar 1988;Costello et al 1993). Theories for predicting mass transfer coefficients have also been developed, with the most notable contribution being made by Bao, Liu & Lipscomb (1999) who determined the mass transfer coefficients for short modules for which the concentration boundary layers are very thin compared to the tube radius.…”

Section: Introductionmentioning

confidence: 99%

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Mass transfer coefficients for laminar longitudinal flow in hollow-fibre contactors

Koo

Sangani

2003

J. Fluid Mech.

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We consider the problem of predicting the rate of mass transfer to a fluid flowing parallel to the axes of randomly placed aligned tubes, a model of hollow-fibre contactors. The analysis is carried out for the limiting cases of short contactors, for which the concentration boundary layers remain thin compared with the radius of the tubes, and for the fully developed case corresponding to very long tubes. Numerical simulations for random arrays are carried out for N randomly placed tubes within a unit cell of a periodic array. It is shown that the mass transfer coefficient for the fully developed case is vanishingly small in the limit N → ∞. This suggests that the mass transfer coefficient for a random array of tubes of radius a enclosed in a shell of radius S will vanish logarithmically as the ratio S/a is increased. This behaviour arises due to the logarithmically divergent nature of concentration disturbances caused by each tube in the plane normal to its axis. A theory is developed for determining conditionally averaged velocity and concentration fields and its predictions are shown to compare very well with the results of rigorous numerical computations. The predictions of the theory are also shown to compare well with the measurements of the mass transfer coefficients in hollow-fibre contactors reported in the literature.

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Section: Comparison With Experimentssupporting

confidence: 86%

Section: Comparison With Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mass transfer coefficients for laminar longitudinal flow in hollow-fibre contactors

Koo

Sangani

2003

J. Fluid Mech.

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“…Remixing and splitting of fluid is considered, fresh fluid constantly presents on the membrane surface is assumed [36] 0.93 0.33 0.93…”

Section: Correlationmentioning

confidence: 99%

Membrane module design and dynamic shear-induced techniques to enhance liquid separation by hollow fiber modules: a review

Yang¹,

Wang²,

Fane³

et al. 2013

Desalination and Water Treatment

119

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Membrane-based separation processes have found numerous applications in various industries over the past decades. However, higher energy consumption, lower productivity and shorter membrane lifespan due to polarization and membrane fouling continue to present severe technical challenges to membrane-based separation. Improved membrane module design and novel hydrodynamics offer strategies to address these challenges.This review focuses on hollow fiber membrane modules which are well-suited to membrane contactor separation processes. Attempts to improve membrane module design should begin with a better understanding of the mass transfer in the hollow fiber module, therefore this review provides a summary of prior studies on the mass transfer models related to both the shell-side and tube-side fluid dynamics. Based on the mass transfer analysis, two types of technique to enhance hollow fiber membrane module performance are discussed: (1) passive enhancement techniques that involve the design and fabrication of effective modules with optimized flow geometry; or (2) active enhancement techniques that uses external energy to induce a high shear regime to suppress the undesirable fouling and concentration polarization phenomena. This review covers the progress over the past five years on the most commonly proposed techniques such as bubbling, vibrations and ultrasound.Both enhancement modes have their advantages and drawbacks. Generally, the passive enhancement techniques offer modest improvement of the system performance, while the active techniques, including bubbling, vibrating and ultrasound, are capable of providing as high as 315 times enhancement of the permeation flux. Fundamentally, the objectives of module design should include the minimization of the cost per amount of mass transferred (energy consumption 3 and module production cost) and the maximization of the system performance through optimizing the flow geometry and operating conditions of the module, scale-up potential and expansion of niche applications. It is expected that this review can provide inspiration for novel module development.

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“…Diameter ekivalen kontaktor d e dapat dihitung melalui persamaan, semakin bersifat turbulen aliran rejim perpindahan massa yang terjadi [10]. Sementara fluks gas yang melalui membrane dapat dihitung melalui persamaan,…”

Section: Pendahuluanunclassified

Absorbsi Co2 Dari Campurannya Dengan Ch4 Atau N2 Melalui Kontaktor Membran Serat Berongga Menggunakan Pelarut Air

Kartohardjono¹,

Anggara²,

Subihi³

et al. 2010

MST

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AbstrakBelakangan ini, kontaktor membran serat berongga mulai banyak digunakan sebagai kontaktor gas-cair yang diantaranya adalah dalam proses penyerapan CO 2 dari aliran gas. Penelitian ini bertujuan untuk mengevaluasi efektivitas kontaktor membran serat berongga untuk absorpsi CO 2 dari campurannya dengan CH 4 atau N 2 menggunakan pelarut air melalui uji perpindahan massa dan uji hidrodinamika air. Ada tiga buah modul membran yang digunakan pada penelitian ini yang berdiameter 1.9 cm, panjang 40 cm dengan jumlah serat masing-masing 10, 15 dan 20 buah dan diameter luarnya 2.7 mm. Variabel operasi yang digunakan pada penelitian ini adalah laju alir pelarut yang melalui kontaktor membran serat berongga. Hasil studi memperlihatkan bahwa koefisien perpindahan massa pada kontaktor membran berbanding lurus dengan laju alir pelarut dan berbanding terbalik dengan jumlah serat yang terdapat di dalam kontaktor membran. Dari hasil penelitian, didapat bahwa pada perpindahan massa yang terjadi, dinyatakan dengan fluks perpindahan CO 2 ke dalam air dapat mencapai sekitar 1,4x10 -9 mol CO 2 /m 2 .det dan koefisien perpindahan massanya dapat mencapai 1,23 x 10 -7 m/det. Sementara itu, hasil uji hidrodinamika memperlihatkan bahwa penurunan tekanan air di dalan kontaktor berbanding lurus dengan jumlah serat dan laju alir pelarut di dalam kontaktor. AbstractCO 2 Absorption from Its Mixture with CH 4 or N 2 through Hollow Fiber Membrane Contactor using Water as Solvent. Hollow fiber membrane contactors have been widely used as gas-liquid contactors recently such as in the CO 2 absorption process from gas stream. This research aims to evaluate the effectiveness of hollow fiber membrane contactor to absorb CO 2 from its mixture with CH 4 or N 2 using water through mass transfer and hydrodynamic tests. There are 3 membrane modules used in this research with shell diameter of 1.9 cm, length of 40 cm, outer fiber diameter of 2.7 mm and fiber number in the contactors of 10, 15 and 20. Liquid flow rates in the hollow fiber membrane contactors are varied in this research. Research results show that mass transfer coefficients in the membrane contactor increase with increasing liquid flow rate and decrease with increasing fiber number in the contactor. Flux of CO2 into water can achieve 1.4x10 -9 mol CO 2 /m 2 .s and mass transfer coefficients can achieve 1.23 x 10 -7 m/s. Meanwhile, hydrodynamic test results show that water pressure drop in the membrane contactors increase with increasing fiber number in the contactors. Keywords: hollow fiber, contactor, mass transfer PendahuluanIndonesia merupakan salah satu negara di dunia yang mempunyai cadangan gas alam yang cukup besar. Selain komponen hidrokarbon, di dalam gas alam juga terkandung beberapa kontaminan seperti uap air, N 2 , CO 2 , dan H 2 S, dengan kadar CO 2 dan uap air relatif lebih besar dibandingkan N 2 dan H 2 S. Gas CO 2 dan H 2 S sering dinamakan sebagai gas asam (acid gas), karena sifatnya yang asam, dengan derajat keasaman lebih tinggi H 2 S. Karena sifat asamnya ini, CO 2 da...

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The effect of shell side hydrodynamics on the performance of axial flow hollow fibre modules

Cited by 249 publications

References 14 publications

Mass transfer coefficients for laminar longitudinal flow in hollow-fibre contactors

Mass transfer coefficients for laminar longitudinal flow in hollow-fibre contactors

Membrane module design and dynamic shear-induced techniques to enhance liquid separation by hollow fiber modules: a review

Absorbsi Co2 Dari Campurannya Dengan Ch4 Atau N2 Melalui Kontaktor Membran Serat Berongga Menggunakan Pelarut Air

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