Hybrid Bead Air Filters with Low Pressure Drops at a High Flow Rate for the Removal of Particulate Matter and HCHO
oleh: Hee Ju Kim, Ye Jin Kim, Yu Jin Seo, Ji Hee Choi, Hye Young Koo, Won San Choi
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-01-01 |
Deskripsi
A tower air filtration system was designed in which bead air filters (BAFs) were actively rotated by a fan motor to remove particulate matter (PM) or HCHO gas. Three types of BAF, hydrophilic, hydrophobic, and hybrid, were prepared and compared for the removal of PM and HCHO gas. A tower air filtration system loaded with hybrid BAFs purified 3.73 L of PM (2500 μg/m<sup>3</sup> PM<sub>2.5</sub>) at a high flow rate of 3.4 m/s with high removal efficiency (99.4% for PM<sub>2.5</sub>) and a low pressure drop (19 Pa) in 6 min. Against our expectations, the PM<sub>2.5</sub> removal efficiency slightly increased as the air velocity increased. The hybrid BAF-200 showed excellent recyclability up to 50 cycles with high removal efficiencies (99.4–93.4% for PM<sub>2.5</sub>). Furthermore, hydrophilic BAF-200 could permanently remove 3.73 L of HCHO gas (4.87 ppm) and return the atmosphere to safe levels (0.41–0.31 ppm) within 60 min without any desorption of HCHO gas.