The particle filtration efficiency of activated carbons (ACs), which are widely used to remove gaseous contaminants by adsorption, was investigated experimentally with different kinds of nanoparticles from 3 to 30 nm. While the chemical composition of nanoparticles did not change the filtration efficiency, the face velocity did significantly. The single sphere efficiency according to the size of nanoparticles was a function of Peclet number (Pe), and the power-law exponent of Pe was about -0.5. This value was between those of packed-beds (-2/3) and nanofibers (-0.43), which might be caused by the deposition of nanoparticles into pores of the ACs through diffusion.
Bibliographical noteFunding Information:
The University of Minnesota thanks the support of members of the Center for Filtration Research : 3M Corporation, BASF Corporation, Boeing Company, Cummins Filtration Inc., Donaldson Company Inc., Entegris Inc., Ford Motor Company, H.B. Fuller Company, Mann+Hummel GmbH, MSP Corporation, Samsung Electronics Co., Ltd, Shigematsu Works Co., Ltd, TSI Inc., and W.L. Gore & Associates, Inc., Xinxiang Shengda filtration Technology Co., Ltd and the affiliate member National Institute for Occupational Safety and Health (NIOSH). The financial and technical support is gratefully acknowledged.
© 2015 Elsevier Ltd.All rights reserved.
Copyright 2018 Elsevier B.V., All rights reserved.