New approach to assessing nanofiber-based air filters efficiency across variable airflow velocities

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F24%3A10256617" target="_blank" >RIV/61989100:27360/24:10256617 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27640/24:10256617

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1383586624047415" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1383586624047415</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.seppur.2024.131002" target="_blank" >10.1016/j.seppur.2024.131002</a>

Result language

angličtina

Original language name

New approach to assessing nanofiber-based air filters efficiency across variable airflow velocities

Original language description

Filtration is a fundamental method in aerosol science for separating unwanted particles, mainly through air filters. Since the onset of the SARS-CoV-2 pandemic in 2019, there has been an increased demand for high-efficiency, low-cost nanofiber-based respirators capable of filtering particles within the size range of viruses and bacteria. The quality factor QF is the critical parameter for evaluating these respirators’ practical effectiveness. QF integrates filtration efficiency with a tolerable pressure drop for the respiratory process. Typically, this pressure drop is reported as a function of the flow rate for a given respirator. However, the physical mechanism of filtration is governed by the mean frontal airflow velocity, which depends not only on the flow rate but also on the membrane area, a parameter often unknown in practical applications. The aerosol flow rate influences filtration efficiency and pressure drop through the membrane, yet a comprehensive physical description of this process has been lacking. Therefore, we developed a mathematical-physical model for filtration using a nanofibrous membrane that accounts for all relevant physical mechanisms. This model provides a more accurate definition of the quality factor. Our findings indicate that filtration efficiency does not reach 100 %, even at near-zero air velocities, and that efficiency approaches an asymptotic plateau at high velocities. When fitted to experimental data from various filters using a three-parameters approach, the model&apos;s predictions show strong agreement, particularly within the central region of the uncertainty band. © 2024 Elsevier B.V.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20400 - Chemical engineering

Project

<a href="/en/project/EH22_008%2F0004631" target="_blank" >EH22_008/0004631: Materials and technologies for sustainable development</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Separation and Purification Technology

ISSN

1383-5866

e-ISSN

—

Volume of the periodical

360

Issue of the periodical within the volume

360

Country of publishing house

US - UNITED STATES

Number of pages

8

Pages from-to

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UT code for WoS article

001388864400001

EID of the result in the Scopus database

2-s2.0-85211742364