Filtration charactistics of the activated carbon/charged fiber hybrid Filter

摘要

Activated carbon is the commonly used solid adsorbent for continuous sampling of gaseous hazards in the environment.In recent years,activated carbon has been also applied in the indoor air cleaners to remove the gaseous pollutants.For convenient use in the air cleaning devices,activated carbon is produced as the activated carbon fiber (ACF) filter.The activated carbon/charged fiber hybrid filter has become a popular indoor air-cleaning device.The charged filter layer is used to collect indoor aerosol,and the activated carbon layer is primarily used to remove gaseous pollutants.In addition gaseous pollutants,the ACF layer is also a kind mechanical filter that can be used to collect aerosols.However,very few researchers have investigated the aerosol filtration characteristics of the ACF layer of the manufactured hybrid filter.Therefore the objectives of the present study are (1) to investigate the aerosol collection efficiency of ACF and charged filer layers of the hybrid filter and (2) to understand the principal filtration mechanisms of the hybrid filter.