Comparison of nonwoven glass and stainless steel microfiber media in aerosol coalescence filtration

Manzo, Gabriel M.; Wu, Y.; Chase, George G.; Goux, Aurélie

doi:10.1016/j.seppur.2016.02.006

Cited by 36 publications

(24 citation statements)

References 17 publications

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“…At pseudosteady state, the pressure drop can be expressed as:

Δ P_{normalw} = Δ P_{0} ([], 1.09 {(α \frac{Z}{d_{normalf}})}^{- 0.561} {(\frac{U_{0} μ}{σ \cos θ})}^{- 0.477})

(where U 0 is filtration velocity), which is mainly determined by surface wettability and filter structure. The above equations suggest that filter material, structure, fiber/fabric dimension, surface wettability, oil type, and droplet size all contribute to the filtration performance …”

Section: Introductionmentioning

confidence: 99%

High‐Efficiency Low‐Resistance Oil‐Mist Coalescence Filtration Using Fibrous Filters with Thickness‐Direction Asymmetric Wettability

Wei

Zhou

Chen

et al. 2018

Adv Funct Materials

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Conventional aerosol filters typically have homogeneous wettability with limited filtration ability especially for small oil mists. Increasing filtration efficiency using thicker filter pad or finer fibers both result in considerable increase of pressure drop, which adversely increases energy consumption. It remains a challenge to develop effective filter materials that can effectively remove oil mists from air at a low flow resistance. Here, a novel concept about improving oil mist filtration efficiency without apparently increasing pressure drop using a fibrous filter with asymmetric wettability across the thickness is demonstrated. Dip-coating and single-side electrospraying are used to make fibrous filter have a homogeneous superoleophobicity or directional oil-transport function. When the two are combined together, they show a filtration efficiency as high as 99.45% for small oil mists (size 0.01-0.8 µm) and nearly 100% for large oil mists (size 0.5-20 µm) with a pressure drop of 9.29 kPa. With the same thickness and fibrous structure, our directional oil-transport/superoleophobic filter has higher quality factor than those with homogeneous oleophilic, superoleophobic, and asymmetric wettability of other superoleophilic/superoleophobic combinations, for both small and large oil mists. Directional oil transport-superoleophobic filters may lead to a novel, high-performance, low energy consumption oil mist separation technology.

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“…At pseudosteady state, the pressure drop can be expressed as:

Δ P_{normalw} = Δ P_{0} ([], 1.09 {(α \frac{Z}{d_{normalf}})}^{- 0.561} {(\frac{U_{0} μ}{σ \cos θ})}^{- 0.477})

Section: Introductionmentioning

confidence: 99%

High‐Efficiency Low‐Resistance Oil‐Mist Coalescence Filtration Using Fibrous Filters with Thickness‐Direction Asymmetric Wettability

Wei

Zhou

Chen

et al. 2018

Adv Funct Materials

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“…Similarly, the Knudsen number for helium flow through the metal foams would be of an order of approximately 10 , which is also insignificant. Other data obtained for stainless steel fibres by Manzo et al [19] has an order of magnitude of 10 for , which results in the Knudsen number for air and helium flow being of the order of magnitude 10 and 10 , respectively. Since foams are considered to fall under the category of fibres and not granular media [20], it can therefore be concluded that the Klinkenberg effect can affect the SSA results for foams of small enough diameter, i.e.…”

Section: Fluid Phase Dependence Due To the Klinkenberg Effectmentioning

confidence: 84%

“…4 are those obtained from substituting eqn (29) into the Dietrich and RUC formulations, i.e. eqns (19) and (25), respectively. Due to the results of the Huu formulation not performing well when compared to the Dietrich and RUC formulations, the Huu formulation was not added in this investigation of fluid phase effects on the SSA results.…”

Section: Fluid Phase Dependence Due To the Klinkenberg Effectmentioning

confidence: 99%

Geometric Versus Kinetic Modelling Approach for Characterizing Porous Metal Foams

Maré

Woudberg

2019

Computational and Experimental Methods in Multiphase and Complex Flow X

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Knowledge of the geometric and kinematic parameters of porous foams are of great importance since it is used in a wide variety of industrial multiphase flow applications that require optimal functionality, e.g. gas filters, heat exchangers and catalyst supports. The large external surface area and high porosity of metal foams provide good chemical resistance, enhanced heat and mass transfer properties and low pressure drops. Four generic geometric models will be considered to characterize the metal foam geometry, namely the cubic unit cell, tetrakaidecahedron, dodecahedron and rectangular representative unit cell (RUC) models, as well as three kinetic approaches from the literature in order to predict the specific surface area (SSA). Two sets of experimental data from the literature will then be compared to the SSA model predictions of the geometric approach and to the SSA values obtained from the kinetic approach. A comparative analysis reveals that the most geometrically complex tetrakaidecahedron model indeed provides the best correspondence with the experimental data for the SSAs, followed by the geometrically simplest RUC model. The latter model, in addition, provides accurate results for the kinetic approach. The advantage of the RUC model is that it is the only geometric model that provides both a geometric and kinetic approach, and, as a result of its relatively simple geometry it is geometrically adaptable towards anisotropy. The Klinkenberg effect will also be considered to determine the influence on the predictions of the SSAs dependency on the permeability coefficients for different fluid phases.

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“…For each medium the deviation in measured permeability is calculated on the basis of the sample thickness deviation. The last filter (named Medium C) has been characterized and studied by Manzo et al (2016) for the removal of liquid aerosol by coalescence filtration. It consists of five sheets of a medium made of stainless steel fibres, of 2.0 mm thickness.…”

Section: Experimental Datamentioning

confidence: 99%

“…Properties of the studied fibrous media (data on the stainless steel medium obtained from Manzo et al (2016)).…”

Section: Tablementioning

confidence: 99%

Investigating the influence of local porosity variations and anisotropy effects on the permeability of fibrous media for air filtration

Woudberg

Theron

Lys

et al. 2018

Chemical Engineering Science

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Comparison of nonwoven glass and stainless steel microfiber media in aerosol coalescence filtration

Cited by 36 publications

References 17 publications

High‐Efficiency Low‐Resistance Oil‐Mist Coalescence Filtration Using Fibrous Filters with Thickness‐Direction Asymmetric Wettability

High‐Efficiency Low‐Resistance Oil‐Mist Coalescence Filtration Using Fibrous Filters with Thickness‐Direction Asymmetric Wettability

Geometric Versus Kinetic Modelling Approach for Characterizing Porous Metal Foams

Investigating the influence of local porosity variations and anisotropy effects on the permeability of fibrous media for air filtration

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