Air filtration performance of symmetric polypropylene hollow-fibre membranes for nanoparticle removal
| Autor: | Mirko Dohnal, Tomáš Svěrák, Jiří Pospíšil, Pavel Bulejko |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Polypropylene
Materials science Particle number Nanoparticle Filtration and Separation 02 engineering and technology Permeation 021001 nanoscience & nanotechnology Condensation particle counter Analytical Chemistry chemistry.chemical_compound Membrane 020401 chemical engineering chemistry Scanning mobility particle sizer Particle size 0204 chemical engineering Composite material 0210 nano-technology |
| Zdroj: | Separation and Purification Technology. 197:122-128 |
| ISSN: | 1383-5866 |
| DOI: | 10.1016/j.seppur.2017.12.056 |
| Popis: | This work aimed to determine filtration performance of polypropylene hollow-fibre membranes (HFMs) for removing submicron particles from air. Experiments were performed in a glass chamber supplied with a nanoaerosol particles formed by burning incense sticks. Three types of HFMs varying in packing density, active filtration area and pore-size distribution were tested in an outside-in configuration. By measuring the number of particles upstream and downstream of the HFM, the filtration efficiency was determined. Three permeate velocities (5, 10 and 15 cm/s) were used to compare the velocity effect on filtration efficiency. Particle counting was carried out using a TSI 3075 condensation particle counter connected to a TSI 3080 scanning mobility particle sizer in 48 particle size channels from 18.1 to 100 nm. The results show high efficiency, mostly higher than 99% for particles above 60 nm size. The most penetrating particle sizes (MPPS) were between 35.9 and 40 nm at 5 cm/s with an efficiency of 82–86%. At permeate velocity of 10 and 15 cm/s, MPPS slightly decreased to range of 34.6–40 nm, with efficiency decreasing to 72–84% and 69–83%, respectively. The quality factor of HFMs was within the 2–28 kPa−1 range. |
| Databáze: | OpenAIRE |
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