Fibrous filtration of liquid aerosols

Substantial Improvement of Oil Aerosol Filtration Performance Using In-Plane Asymmetric Wettability

“…Aerosol oil droplets are widely emitted pollution from industrial production and daily life . They are the primary pollution source causing health and environmental issues.…”

“…It has been an essential process for industrial production and environmental protection. The conventional filters for oil mist filtration are deficient in either a relatively high filtration resistance or inadequate efficiency when filtering small oil droplets (i.e., diameter less than 1 μm). , Several approaches have been reported to improve the filtration performance, such as optimization of materials and filters (e.g., shape or dimension), ,, integration of nanofibers into the filter layer, , and surface modification. , The integration of nanofibers into filters can increase the filtration efficiency for both solid and oil particles. ,,− However, adding a small number of nanofibers to microfiber media has only a limited improvement in capture efficiency, although there is a marginal increase in pressure drop. − In contrast, the addition of a large number of nanofibers usually results in an adversely massive increase in pressure drop without further improvement in the efficiency. , The optimum amount of nanofiber to add to a filter medium is sensitive to the captured particle size, making it hard to design the filter media when the challenging particles have a broad size distribution …”

“…Aerosol oil droplets are widely emitted pollution from industrial production and daily life. 1 They are the primary pollution source causing health and environmental issues. Aerosol oil droplets are also significant contaminants for natural gas transmission and compressed air.…”

“…The conventional filters for oil mist filtration are deficient in either a relatively high filtration resistance or inadequate efficiency when filtering small oil droplets (i.e., diameter less than 1 μm). 2,3 Several approaches have been reported to improve the filtration performance, such as optimization of materials and filters (e.g., shape or dimension), 1,4,5 integration of nanofibers into the filter layer, 6,7 and surface modification. 8,9 The integration of nanofibers into filters can increase the filtration efficiency for both solid and oil particles.…”

Filtration performance of air filter paper containing kapok fibers against oil aerosols

“…The face velocity and the physical-chemical characteristics of the liquid affect the filtration efficiency and pressure drop curves significantly (Charvet et al 2008;Chang et al 2017;Kolb et al 2017). Most studies of the pressure drop transition during oil aerosol loading process claimed that there are four stages during the process (Mead-Hunter et al 2017;Kampa et al 2014;Contal et al 2004). Firstly, the pressure drop increases slowly due to the deposition of oil aerosols on the surface of individual fiber.…”