High efficiency air filtration: The growing impact of membranes

Removal of airborne nanoparticles by membrane coated filters

“…Both types of filters have been widely used in different industrial fields. The membrane filters generally possess relatively high solid fractions and may provide high efficiency and excellent pressure drop features (Sutherland 2008, Galka and Saxena 2009, Kuo et al 2010). The membrane filters rely more on the surface filtration than on the depth filtration for particles larger than the rated pore sizes in the membrane (Rubow and Liu 1986, Ling et al 2010).…”

Influencing factors on low-temperature deNOx performance of Mn–La–Ce–Ni–Ox/PPS catalytic filters applied for cement kiln

“…1(e) showed the Mn-La-Ce-Ni-O x /PPS after spraying PTFE emulsion and the PPS fibers which attaching catalyst powder has been coated by PTFE emulsion. The PTFE coating can not only improve the filter material resistance to chemical corrosion and ash removal performance but also prolong the life of fiber [6][7][8], fix catalyst particles and also make them more secure attachment.…”

Composite nonwovens in filters: applications

“…High alpha membrane fi lters lower the pressure drop, leading to signifi cant savings in energy consumption during cleanroom operations. Over the typical fi ve-year useable life of a fi lter, the resulting savings easily outweigh the added cost for the membrane fi lter (Galka and Saxena, 2009).…”

“…These vent fi lters require an absolute barrier to microorganisms in aerosols and to bacteria in the event the fi lter is wet out. The gamma stable properties of UPE membranes provide signifi cant benefi t in single-use applications in the medical and biopharmaceutical fi elds (Galka and Saxena, 2009).…”