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Article Abstract
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 PM) at a high flow rate of 3.4 m/s with high removal efficiency (99.4% for PM) and a low pressure drop (19 Pa) in 6 min. Against our expectations, the PM 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). 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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8840364 | PMC |
| http://dx.doi.org/10.3390/polym14030422 | DOI Listing |
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