A comprehensive review of particle loading models of fibrous air filters

Berry, Gentry; Beckman, Ivan P.; Cho, Heejin

doi:10.1016/j.jaerosci.2022.106078

Cited by 16 publications

(7 citation statements)

References 82 publications

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“…Recently, as an effective solution to indoor pollutants, air filters have become widely used . Many researchers from different countries have conducted related studies, such as the optimization of filter structures, improvement of filtration efficiency, , controlling the economic cost of filter materials, the selection of places to use filters, and development of new air filter materials. − However, although some useful results have been obtained by these studies, there are still many outstanding problems, such as the inability to effectively remove the high concentration of particulate matter and the low efficiency of filter fiber materials. In addition, it is difficult to widely promote these filters due to the relatively high economic cost of the new materials and the relatively high difficulty of preparation .…”

Section: Introductionmentioning

confidence: 99%

Modifying the Fiber Structure and Filtration Performance of Polyester Materials Based on Two Different Preparation Methods

Zhang

Wang

et al. 2023

Langmuir

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How to build a satisfactory indoor environment has become increasingly important. In this paper, the synthesis and improvement of the most widely used polyester materials in China were carried out based on two different preparation methods, and the structures and filtration performances were tested and analyzed. The results showed that a carbon black coating was wrapped on the surfaces of the new synthetic polyester filter fibers. Compared with the original materials, the filtration efficiencies of PM10, PM2.5, and PM1 were increased by 0.88–6.26, 1.68–8.78, and 0.42–4.84%, respectively. The best filtration velocity was 1.1 m/s, and the new synthetic polyester materials with direct impregnation demonstrated superior filtration performance. The filtration efficiency of the new synthetic polyester materials was improved on the particulates with sizes of 1.0–5.0 μm. The filtration performance of G4 was better than that of G3. The filtration efficiencies of PM10, PM2.5, and PM1 were improved by 4.89, 4.20, and 11.69%, respectively. The quality factor value can be used to assess the comprehensive filtration performance of air filters in practical applications. It could provide reference values for the selection of synthetic methods of new filter materials.

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Section: Introductionmentioning

confidence: 99%

Modifying the Fiber Structure and Filtration Performance of Polyester Materials Based on Two Different Preparation Methods

Zhang

Wang

et al. 2023

Langmuir

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“…Many researchers from different countries have conducted related studies regarding these practical issues [16][17][18][19], focusing on improving the filtration efficiency [16], optimizing the filter structure [17], and developing new materials [18,19]. However, these research results have not effectively solved the problem of dust retention in the filter materials, or the problems caused by the filter fiber materials' low efficiency and high resistance [20].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Factors Influencing the Regeneration Performance of Reduced Graphite Oxide Filter Materials under Water Cleaning

Yang

Zhang

et al. 2023

Materials

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With the normalization of epidemic prevention and control, air filters are being used and replaced more frequently. How to efficiently utilize air filter materials and determining whether they have regenerative properties have become current research hotspots. This paper discusses the regeneration performance of reduced graphite oxide filter materials, which were studied in depth using water cleaning and the relevant parameters, including the cleaning times. The results showed that water cleaning was most effective using a 20 L/(s·m2) water flow velocity with a 17 s cleaning time. The filtration efficiency decreased as the number of cleanings increased. Compared to the blank group, the filter material’s PM10 filtration efficiency decreased by 0.8%, 19.4%, 26.5%, and 32.4% after the first to fourth cleanings, respectively. The filter material’s PM2.5 filtration efficiency increased by 12.5% after the first cleaning, and decreased by 12.9%, 17.6%, and 30.2% after the second to fourth cleanings, respectively. The filter material’s PM1.0 filtration efficiency increased by 22.7% after the first cleaning, and decreased by 8.1%, 13.8%, and 24.5% after the second to fourth cleanings, respectively. Water cleaning mainly affected the filtration efficiency of particulates sized 0.3–2.5 μm. Reduced graphite oxide air filter materials could be water washed twice and maintain cleanliness equal to 90% of the original filter material. Water washing more than twice could not achieve the standard cleanliness equal to 85% of the original filter material. These data provide useful reference values for the evaluation of the filter materials’ regeneration performance.

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“…Thomas et al [4] combined a modified version of Bergman's model with Novick's model and provided a robust framework to describe the full life cycle of filtration media, benefiting from the strengths of both models. Berry et al [5] provided a more thorough review of the loading models given above, as well as other relevant loading models.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Influence of Data Collection and Analysis Procedures on Aerosol Filtration Model Development

Berry,

Knizley,

Beckman

et al. 2024

Atmosphere

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Fibrous air filters are common devices used to remove airborne particles. Their performance is typically measured through their resistance to airflow and captured particle mass. Models describing the evolution of filter performance have been heavily researched; however, the need for improvement remains. Experimental work is irreplaceable in the development of high-fidelity models, yet the estimation of necessary variables is not trivial and may be influenced by selected measurement instruments and analysis methodologies. Therefore, the purpose of this work is to propose a framework to investigate the response of common aerosol measurement instruments, their corresponding analysis methodologies, and the application of their data. A Scanning Mobility Particle Sizer (SMPS) and Laser Aerosol Spectrometer (LAS) were selected for consideration, and their recorded data were compared against baseline measurements. The results of the experiments indicated that the SMPS and LAS yielded a ratio of estimated mass concentrations to the baseline mass concentrations of approximately 1.175 and 0.749, respectively. Regarding the SMPS, it was suggested that the measurable size range, application of a coverage factor, dynamic shape factor, and association between the curve fits and histograms were influential in the final estimates. For the LAS, the application of a curve fit, its association to the histograms, and the selection of the sampling periods were influential. Considering the results, the impact of these factors may not be considered negligible and may skew reproducibility between studies and fossilize confounding factors. Therefore, the proposed methodologies are useful in addressing potential errors in data collection and analysis.

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A comprehensive review of particle loading models of fibrous air filters

Cited by 16 publications

References 82 publications

Modifying the Fiber Structure and Filtration Performance of Polyester Materials Based on Two Different Preparation Methods

Modifying the Fiber Structure and Filtration Performance of Polyester Materials Based on Two Different Preparation Methods

Experimental Study of the Factors Influencing the Regeneration Performance of Reduced Graphite Oxide Filter Materials under Water Cleaning

Investigation of the Influence of Data Collection and Analysis Procedures on Aerosol Filtration Model Development

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