Increase in collector efficiency due to deposition in polydispersed granular filtration—an experimental study

Abstract

Granular filtration of polydispersed aerosols was studied experimentally. Among the various variables which affect the increase in the collection efficiency during filtration, the most important one was found to be the size of the deposited aerosol particles. It was shown rather conclusively that for a given extent of total deposition, the extent of increase in collection efficiency increases with the decrease of the deposited aerosol size. For the general case where the deposited particles have different sizes, a procedure was proposed for correlating and predicting experimental results on collection efficiencies. This procedure was found applicable to both bidispersed aerosols and polydispersed aerosols. A preliminary correlation was also suggested for predicting the increase in collection efficiency due to deposition.