High efficiency air filtration: The growing impact of membranes

Galka, Ned; Saxena, Abhishek

doi:10.1016/s0015-1882(09)70157-0

Cited by 31 publications

(17 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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).…”

Section: Introductionmentioning

confidence: 99%

Removal of airborne nanoparticles by membrane coated filters

Liu

Pui

Wang

2011

Science of The Total Environment

View full text Add to dashboard Cite

The increasing amount of nanoparticles with the development of nanotechnology gives rise to concerns about potential negative impact on the environment and health hazards posed to humans. Membrane filter is an effective media to control nanoparticles. Three filters coated with polytetrafluoroethylene (PTFE) membrane were investigated in this study. A series of experiments on the filter efficiency and relevant parameters such as the particle size and face velocity were carried out. The data show that the efficiency curves for the membrane filters demonstrate the typical shape of “v” for particle sizes from 10 to 300 nm at face velocities from 0.3 to 15 cm/s. Membrane filters with larger pore sizes have larger Most Penetrating Particles Sizes (MPPS), and the MPPS decreases with increasing face velocity. The efficiencies decrease with increasing face velocity for particle sizes from 10 to 300 nm. We present the filtration efficiency data as a novel three-dimensional graph to illustrate its dependence on the particle size and face velocity. The membrane coated filter can be considered as two combined layers, one fibrous layer and one membrane layer. We develop a new filtration efficiency model which is a combination of the models for the two layers. Results from the model calculation agree with experimental data well. The study can help to optimize the filter product and to determine the operational parameters of filters, thus contributing to reduction of air pollution by rapidly emerging nanoparticles.

show abstract

Section: Introductionmentioning

confidence: 99%

Removal of airborne nanoparticles by membrane coated filters

Liu

Pui

Wang

2011

Science of The Total Environment

View full text Add to dashboard Cite

show abstract

“…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.…”

Section: Preparation Of the Catalytic Filtermentioning

confidence: 99%

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

Yang

Zheng

Shen

et al. 2015

Journal of Industrial and Engineering Chemistry

View full text Add to dashboard Cite

“…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).…”

Section: Use Of Membrane Over Support Layermentioning

confidence: 99%

“…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).…”

Section: Use Of Membrane Over Support Layermentioning

confidence: 99%

Composite nonwovens in filters: applications

Mukhopadhyay

2014

Composite Non-Woven Materials

View full text Add to dashboard Cite

High efficiency air filtration: The growing impact of membranes

Cited by 31 publications

References 2 publications

Removal of airborne nanoparticles by membrane coated filters

Removal of airborne nanoparticles by membrane coated filters

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

Composite nonwovens in filters: applications

Contact Info

Product

Resources

About