Separation of nanoparticles and nanodroplets from air using fibrous filters

• Autorzy: Werner Ł. , Jackiewicz A.
• Języki publikacji: EN

Abstrakty

EN

Separation of particles from gas stream is of great importance in many areas of human life. Air filtering materials have wide applications. They are used inter alia in ventilation and air conditioning systems, in cars to reduce emission from diesel engines, in the device of everyday use (e.g. vacuum cleaner), as a personal protective equipment for example to avoid inhalation hazardous dust from industrial processes. Small airborne particles can cause a variety problems for human health. Long exposure to particles of submicron- and nano-sized has been related to higher death rates due to lung cancer and cardiopulmonary illness. The main object of this study was to investigate filtration efficiency of oil nanodroplets (DEHS di-ethylhexyl sebacate) and salt nanoparticles (KCl) from air using fibrous polypropylene media made by melt-blown technique. Fibrous filters are relatively inexpensive to fabricate and what is the most important they are high efficient with simultaneous low flow resistance. Three types of non-wovens having various morphology with different average fiber diameter were tested. The tests show that both KCl solid nanoparticles and DEHS nano oil-mist can be efficiently separate from the air using melt-blown fibrous materials. Moreover these filters have been also electrically charged by corona discharge. The filtration efficiency of charged filters (electrets) was compared with efficiency of uncharged (mechanicals) samples. Results showed significant increase in filtration efficiency for the filters with electric charge compared with uncharged ones.

Słowa kluczowe

EN

electrets; fibrous filters; filtration; nanodroplets; nanoparticles

PL

elektrety; filtry włókniste; filtrowanie; nanocząstki

• Wydawca: Foundation for Young Scientists
• Czasopismo: Challenges of Modern Technology
• Rocznik: 2015
• Tom: Vol. 6, no. 3
• Strony: 15--19
• Opis fizyczny: Bibliogr. 6 poz., rys., wykr., tab.

Twórcy

autor

Werner Ł.

• Warsaw University of Technology, Department of Chemical and Process Engineering Waryńskiego 1, 00-645 Warsaw, Poland

autor

Jackiewicz A.

• Warsaw University of Technology, Department of Chemical and Process Engineering Waryńskiego 1, 00-645 Warsaw, Poland

Bibliografia

• [1] A. Jackiewicz, A. Podgórski, L. Gradoń, J. Michalski, Nanostructured Media to Improve the Performance of Fibrous Filters, KONA Powder and Particle Journal, 2013, 30(30): 244–55
• [2] A. Jackiewicz, L.Gradoń, Sposoby zwiększania sprawności odpylania filtrów włókninowych, Inż. Ap. Chem. 2011, 50, 5, 42-43
• [3] D. Knittel and E. Schollmeyer, Technologies for a new century. Surface modification of fibres, J TEXTILE I, 91, 2000, 151-165
• [4] S. Chazelet, D. Bemer, F. Grippari, Effect of the test aerosol charge on the penetration through electret filter, Separation and Purification Technology, Volume 79, Issue 3, 24 June 2011, 352-356
• [5] T. Jankowski, Filtracja aerozoli cieczy emitowanych podczas obróbki mechanicznej z użyciem chłodziw olejowych, Bezpieczeństwo pracy – nauka i praktyka, No. 7-8 (454-455) JulyAugust 2009
• [6] W.G. Shin, G.W. Mulholland, S.C. Kim, D.Y.H. Pui, Experimental study of filtration efficiency of nanoparticles below 20 nm at elevated temperatures, Aerosol Science, 39, 2008, 488 – 499