Mass transfer performance for hollow fibre modules with shell-side axial feed flow: using an engineering approach to develop a framework

Lipnizki, Frank; Field, Robert W.

doi:10.1016/s0376-7388(01)00512-9

Cited by 115 publications

(71 citation statements)

References 20 publications

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“…(4) is 0.66, which can well fit the experimental data. A value larger than 0.33 indicates that the transverse flow module provides a component of velocity perpendicular to the hollow fiber surface, which results in a higher mass transfer coefficient than that achieved with the parallel flow module [13]. In literatures, similar Reynolds exponents were also reported by Prasad and Sirkar [14] (Sh ≈ Re 0.6 ), Mavroudi [15] (Sh ≈ Re 0.67 ) and Vladisavljevic [11] (Sh ≈ Re 0.67 ).…”

Section: Resultssupporting

confidence: 63%

Performance of Hollow Fiber Membrane Gas-Liquid Contactors to Absorb Co2 Using Diethanolamine (Dea) as a Solvent

Kartohardjono

Nata

Prasetio

et al. 2010

MST

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This study uses DEA solution to absorb CO 2 from the gas flow through the hollow fiber membrane contactors. This study aims to evaluate the performance of hollow fiber membrane contactors to absorb CO 2 gas using DEA solution as solvent through mass transfer and hydrodynamics studies. The use of DEA solution is to reduce the mass transfer resistance in the liquid phase, and on the other side, the large contact area of the membrane surface can cover the disadvantage of membrane contactors; additional mass transfer resistance in the membrane phase. During experiments, CO 2 feed flows through the fiber lumens, while the 0.01 M DEA solution flows in the shell side of membrane contactors. Experimental results show that the mass transfer coefficients and fluxes of CO 2 increase with an increase in both water and DEA solution flow rates. Increasing the amount of fibers in the contactors will decrease the mass transfer and fluxes at the same DEA solution flow rate. Mass transfer coefficients and CO 2 fluxes using DEA solution can achieve 28,000 and 7.6 million times greater than using water as solvent, respectively. Hydrodynamics studies show that the liquid pressure drops in the contactors increase with increasing liquid flow rate and number of fibers in the contactors. The friction between water and the fibers in the contactor was more pronounced at lower velocities, and therefore, the value of the friction factor is also higher at lower velocities.

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Section: Resultssupporting

confidence: 63%

Performance of Hollow Fiber Membrane Gas-Liquid Contactors to Absorb Co2 Using Diethanolamine (Dea) as a Solvent

Kartohardjono

Nata

Prasetio

et al. 2010

MST

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“…This may be due to relatively minor changes in the fluid dynamics in the shell side (Re f decreased gradually from 1100 to 674). It should be noticed that a similarly complex relationship between the packing density and module performance were observed in many studies involving shell-side flow distribution when using gas-liquid hollow fiber membrane contactors [27,28,30,32,45].…”

Section: Fiber Packing Densitymentioning

confidence: 72%

Performance improvement of PVDF hollow fiber-based membrane distillation process

Yang

Wang

Shi

et al. 2011

Journal of Membrane Science

228

144

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The performance of membrane distillation depends on both membrane and module characteristics. This paper describes strategies to improve the performance of hollow fiber membrane modules used in Direct Contact Membrane Distillation (DCMD).Three different types of hydrophobic polyvinylidene fluoride (PVDF) hollow fiber membrane (unmodified, plasma modified and chemically modified) were used in this study of Direct Contact Membrane Distillation (DCMD). Compared to the unmodified PVDF hollow fiber membrane, both modified membranes showed greater hydrophobicity and mechanical strength, smaller maximum pore sizes and narrower pore size distributions, leading to more sustainable fluxes and higher water quality (distillate conductiviy < 1µs·cm -1 ) over a one month test using synthetic seawater (3.5 wt% sodium chloride solutions).Comparing the plasma and chemical modification the latter has marginally better performance and provides potentially more homogeneous modification.MD modules based on shell and tube configuration were tested to identify the effects of shell and lumen side flow rates, fiber length and packing density. The MD flux increased to an asymptotic value when shell-side Re f was larger than 2500, while the permeate/lumen side reached an asymptotic value at much lower Re p (>300). By comparing the performance of small and larger modules, it was found that it is important to utilize a higher shell-side Re in the operation to maintain a better mixing near the membrane surface in a larger module.Single fiber tests in combination with heat transfer analysis, verified that a critical fiber 3 length existed that is the required length to assure sufficient driving force along the fiber to maintain adequate MD performance. In addition, for multi-fiber modules the overall MD coefficient decreased with increasing packing density, possibly due to flow maldistribution.This study shows that more hydrophobic membranes with a small maximum pore size and higher liquid entry pressure are attainable and favorable for MD applications. In order to enhance MD performance various factors need to be considered to optimize fluid dynamics and module configurations, such as fiber length, packing density and the effect of module diameter and flow rates.

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“…Although many studies have focused on either empirical or fundamental approaches to describe the shell-side mass transfer coefficient in conventional cross-flow hollow fiber modules [20][21][22][23][24], none of them are presented in a general form which can be applied to all membrane processes involved liquid phases. Most of the studies on mass transfer inside hollow fiber modules are based on membrane contactors, and the blood oxygenator and CO 2 contactor are the most adopted processes to study the shell-side fluid behavior due to their simplicity.…”

Section: Mass Transfer In Shell-sidementioning

confidence: 99%

“…To make the model more comprehensive, Lipnizki and Field [21] incorporated the effect of packing density and mal-distribution into the hydraulic diameter, divided the hollow fiber module into segments and proposed the prediction of average Sh via a sum of the local Sh k :…”

mentioning

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

116

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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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Mass transfer performance for hollow fibre modules with shell-side axial feed flow: using an engineering approach to develop a framework

Cited by 115 publications

References 20 publications

Performance of Hollow Fiber Membrane Gas-Liquid Contactors to Absorb Co2 Using Diethanolamine (Dea) as a Solvent

Performance of Hollow Fiber Membrane Gas-Liquid Contactors to Absorb Co2 Using Diethanolamine (Dea) as a Solvent

Performance improvement of PVDF hollow fiber-based membrane distillation process

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

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