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Nanofibre filters may offer new properties not available in commercial fibre filters. These include a higher surface area and the ability to include novel materials within the fibres. In addition the small size allows potential gains in performance due to the slip-flow phenomenon in which normal gas viscosity does not apply to objects smaller than the mean free path of the gas. We tested the properties of novel electrospun fibre filters generated from polyvinyl alcohol solutions, optionally embedded with nano-grains of photocatalytic TiO2 and activated charcoal. The tested materials exhibited pressure drops in the range of 195 Pa to 2693 Pa for a face velocity of 5.3 cm/s and a removal efficiency greater than 97% for 12–480 nm particles. Basis weights for the filters ranged from 16.6 to 67.6 g/m2 and specific surface areas ranged from 1.4 to 17.4 m2/g. Reactivity towards volatile organic compounds (VOCs) was achieved by irradiating the photocatalytic filters with ultraviolet light. It is necessary to solve the problems connected to the absorbance of VOCs and further reduce the resistance to airflow in order for these filters to achieve widespread use. The incorporation of reactive air filtration into building ventilation systems will contribute to improved indoor air quality.
Roberta Orlando; Merve Polat; Alireza Afshari; Matthew Johnson; Peter Fojan. Electrospun Nanofibre Air Filters for Particles and Gaseous Pollutants. Sustainability 2021, 13, 6553 .
AMA StyleRoberta Orlando, Merve Polat, Alireza Afshari, Matthew Johnson, Peter Fojan. Electrospun Nanofibre Air Filters for Particles and Gaseous Pollutants. Sustainability. 2021; 13 (12):6553.
Chicago/Turabian StyleRoberta Orlando; Merve Polat; Alireza Afshari; Matthew Johnson; Peter Fojan. 2021. "Electrospun Nanofibre Air Filters for Particles and Gaseous Pollutants." Sustainability 13, no. 12: 6553.
A variety of air filtration technologies are commercially available for reducing particles and gaseous contaminants that may enter buildings from outside. According to the World Health Organization (WHO), there is an increasing range of adverse health effects linked to air pollution, at even-lower concentration of pollutants. This article presents a short literature overview of air filtration technologies, which focus on assessing their ability in removing both particles and gaseous compounds. The aim is to provide information about current research development of air filtration technologies as well as their advantages, limitations and performance in terms of removal efficiency, pressure drop and formation of by-products. Mechanical filters and electrostatic filters are efficiently used for the removal of particles. Photocatalytic oxidant and adsorbent air filters are commonly used for gas removal. These last two types of filters are not feasible for particles removal. Air filtration using electrospun nanofiber filters have been studied, however, the performance of such filters for the removal of particles and gaseous contaminants at the same time has to be further investigated.
Roberta Orlando; Peter Fojan; Jinhan Mo; Niels C. Bergsøe; Alireza Afshari. Single-Stage Air Filtration of Particles and Gaseous Contaminants in Buildings: A Literature Study. IOP Conference Series: Earth and Environmental Science 2020, 588, 032073 .
AMA StyleRoberta Orlando, Peter Fojan, Jinhan Mo, Niels C. Bergsøe, Alireza Afshari. Single-Stage Air Filtration of Particles and Gaseous Contaminants in Buildings: A Literature Study. IOP Conference Series: Earth and Environmental Science. 2020; 588 (3):032073.
Chicago/Turabian StyleRoberta Orlando; Peter Fojan; Jinhan Mo; Niels C. Bergsøe; Alireza Afshari. 2020. "Single-Stage Air Filtration of Particles and Gaseous Contaminants in Buildings: A Literature Study." IOP Conference Series: Earth and Environmental Science 588, no. 3: 032073.