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. 2023 Apr 4;15(7):1787.
doi: 10.3390/polym15071787.

Pressure Drop Dynamics during Filtration of Mixture Aerosol Containing Water, Oil, and Soot Particles on Nonwoven Filters

Mateusz Kamiński  1 , Jakub M Gac  1 , Piotr Sobiech  2 , Paweł Kozikowski  2 , Tomasz Jankowski  2
Affiliations

Pressure Drop Dynamics during Filtration of Mixture Aerosol Containing Water, Oil, and Soot Particles on Nonwoven Filters

Mateusz Kamiński et al. Polymers (Basel). .

Abstract

The pressure drop dynamics during the filtration of three-component mixture aerosols are investigated and compared with two and single-component aerosols. The main area of interest is the effect of the addition of a small quantity of liquid (oil) and solid (soot) particles during the filtration of aerosol containing water mist. In addition, calculations of the change in filter mass during oil aerosol filtration have been carried out and compared with the experimental results. The new, improved filtration efficiency model takes into account a better coefficient fitting in the filtration mechanism equations. The limitations in the change in fibre diameter and packing density resulting from the filter loading have been implemented in the model. Additionally, the calculation model employs the fibre size distribution representation via multiple average fibre diameters. The changes in fibre diameter are dependent on each fibre's calculated filtration efficiency. The improved filtration model has been utilised to predict the mass change of the filters during the filtration of pure and mixture aerosols. The pressure drop calculation model based on changes in filter mass has been formulated. The model is then utilised to calculate pressure drop changes resulting from the filtration of the oil aerosol and water and oil mixture aerosol.

Keywords: fibrous filter; filtration efficiency; mixture aerosol; pressure drop; wettability difference.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Experimental setup.
Figure 2
Figure 2
Melt-blown method overview (left) and obtained filter sample (right).
Figure 3
Figure 3
Particle size distribution for (a) water and (b) oil and soot aerosols.
Figure 4
Figure 4
Structure of the (left) F1 filter and (right) F6 filter.
Figure 5
Figure 5
Example of the utilised measurement method for the (left) F1 filter and (right) F6 filter.
Figure 6
Figure 6
Measured fibre size distribution for (a) F1 filter and (b) F6 filter.
Figure 7
Figure 7
Calculated (a) numeric fraction and (b) cumulative volume fraction for oil aerosol.
Figure 8
Figure 8
Measured and calculated fractional efficiencies for oil aerosol for 2F6 filter.
Figure 9
Figure 9
Pressure drop changes calculated and measured for (a) 2F6 and (b) F6 filters during oil aerosol filtration.
Figure 10
Figure 10
Pressure drop changes calculated and measured for (a) 2F1 and (b) F1 filters during oil aerosol filtration.
Figure 11
Figure 11
Pressure drop measured during filtration of various aerosols for (a) 2F6 and (b) F1 filters.
Figure 12
Figure 12
Pressure drop measured and calculated during filtration of water + oil aerosol for (a) 2F6 and (b) F1 filters.
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