Performances of ceramic filters for air purification

Larbot, A.; Bertrand, Marielle; Marre, Sonia; Prouzet, Éric

doi:10.1016/s1383-5866(03)00062-5

Cited by 15 publications

(14 citation statements)

References 1 publication

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“…In general, pressure drop across a granular filter increases with increasing filtration velocity and depends on the physical properties of the filter (Larbot et al 2003) Figure 8 shows the pressure drops of the ceramic filters prepared with SiC powders of various sizes and filtration velocities ranging from 1 to 3 m/min. The experimental pressure drop was compared with the pressure drop predicted by Kozeny-Carman's equation as shown in Equation (1) (Endo et al 2002):…”

Section: Filtration Performancementioning

confidence: 99%

“…The diffusional collection mechanism arises from the Brownian movement of fine particles escaping from a streamline (Larbot et al 2003;Freitas et al 2006). The predicted equation of single collector efficiency, h D , due to diffusion was proposed by Tien (1989) and expressed as…”

Section: Filtration Mechanismsmentioning

confidence: 99%

“…Inertial force is a dominant collection mechanism at high filtration velocity, high particle density, and large particle size (Larbot et al 2003). The single collector efficiency, h I, is expressed in Equation (8) as suggested by Jung et al (1989) :…”

Section: Filtration Mechanismsmentioning

confidence: 99%

“…Paretsky et al (1971) Gravitation is a dominant collection mechanism when a particle is large enough and filtration velocity is quite low. The prediction equation is given by (Paretsky et al 1971;Larbot et al 2003) …”

Section: Filtration Mechanismsmentioning

confidence: 99%

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Preparation of Granular Ceramic Filter and Prediction of Its Collection Efficiency

Choi

Kim

et al. 2014

Aerosol Science and Technology

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The silicon carbide (SiC) ceramic filter is the most favorable component to remove particulate matter from hot flue gas due to its high filtration efficiency and high thermal durability. The effect of SiC powder size on the physical properties and filtration performance to prepare high-performance granular ceramic filter media was investigated in this study. Disk-type filter media were prepared by mixing ceramic components followed by physical compression and sintering. The porosity and average pore diameter in the filter media increased with increasing powder size. However, the mechanical strength decreased with increasing powder size, while it increased with increasing physical compressive force. The filter performance factor, q FM was introduced to evaluate the ceramic filter properties, and the SiC50 filter was the best of the ceramic filters prepared in this study. We also found that diffusion was a dominant collection mechanism for particles smaller than 0.7 mm, and direct interception and inertia were dominant collection mechanisms for particles larger than 0.7 mm in the SiC50 filter based on a single collector efficiency model. In addition, the predicted collection efficiencies showed reasonably good agreement with the experimental ones.

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Section: Filtration Performancementioning

confidence: 99%

Section: Filtration Mechanismsmentioning

confidence: 99%

Section: Filtration Mechanismsmentioning

confidence: 99%

Section: Filtration Mechanismsmentioning

confidence: 99%

See 2 more Smart Citations

Preparation of Granular Ceramic Filter and Prediction of Its Collection Efficiency

Choi

Kim

et al. 2014

Aerosol Science and Technology

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show abstract

“…There are different kinds of filter media. While fine pore size ceramic media is available [10,11], the use of ceramic filter has limitations such as low gas permeability. On the other hand, metal filters for fine particle filtration in the microfiltration range with high permeability will have mechanical and thermal shock resistance, can provide the possibility to be welded for modulation and have corrosion resistant filtration systems.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of nickel filter made by uniaxial pressing process for gas purification: Fabrication pressure effect

Ryi

Park

et al. 2007

Journal of Membrane Science

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An efficient and continuous filter operation for dust‐laden flue gas based on a self‐cleaning stainless steel weaved filter

Lai

Jiang

et al. 2022

Env Prog and Sustain Energy

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Advanced filtration technologies of the high‐temperature flue gas are crucial for lower emission of dust particles and higher heat recovery. An efficient and continuous filter for high‐temperature flue gas based on a self‐cleaning stainless steel fabric is proposed in this article. Analysis of the microstructure of stainless steel fabric is conducted and derived the optimal structural parameters of the fabric. Considering uniformity of flow field, the structure of filter bag and arrangement of bags of the filter are optimized. Based on the optimal condition, single‐bag experiments are conducted, which show that the filtration efficiency and pressure drop got stabilized (i.e., 99.8% and 1222 Pa) with enough operation time and only affected by filtration superficial velocity. The dust cake structure could reach dynamic self‐equilibrium in the overall structure, verifying that self‐cleaning can be achieved applying stainless steel fabric. A pilot‐scale high‐temperature flue gas system is set up and the results indicate that the filtration efficiency reaches stable and maintains above 99.9% with 1440 h of uninterrupted service at 793 ~ 809°C, and the outlet dust concentration of flue gas is less than 8.3 mg/m3.

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Performances of ceramic filters for air purification

Cited by 15 publications

References 1 publication

Preparation of Granular Ceramic Filter and Prediction of Its Collection Efficiency

Preparation of Granular Ceramic Filter and Prediction of Its Collection Efficiency

Fabrication of nickel filter made by uniaxial pressing process for gas purification: Fabrication pressure effect

An efficient and continuous filter operation for dust‐laden flue gas based on a self‐cleaning stainless steel weaved filter

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