Air filtration performance of hollow-fibre membranes for submicron particles removal

abstract

en

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 an aerosol of submicrometric particles. 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 64 particle size channels from 16.8 to 572.5 nm. The results show high efficiency, mostly higher than 99% for particles above 100 nm size. The most penetrating particle sizes (MPPS) were between 22 and 30 nm at 5 cm/s with an efficiency of 86–97%. However, with twofold permeate velocity, MPPS changes to higher diameters, with efficiency rapidly decreasing to 31–56% and to 6% at 15 cm/s. The quality factor of HFMs was within the 0.005 to 0.03 Pa−1 range.

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 an aerosol of submicrometric particles. 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 64 particle size channels from 16.8 to 572.5 nm. The results show high efficiency, mostly higher than 99% for particles above 100 nm size. The most penetrating particle sizes (MPPS) were between 22 and 30 nm at 5 cm/s with an efficiency of 86–97%. However, with twofold permeate velocity, MPPS changes to higher diameters, with efficiency rapidly decreasing to 31–56% and to 6% at 15 cm/s. The quality factor of HFMs was within the 0.005 to 0.03 Pa−1 range.

Air filtration; hollow-fibre membranes; submicron particles; efficiency

02.10.2017

Barcelona

978-84-697-8629-1

10th World Congress of Chemical Engineering 2017

970–970

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