Nanofibers, owing to their ultra small diameters, have high surface areas that are advantageous in fibrous filtration. By augmenting micro glass fiber media with nanofibers, a wide range of micron and sub-micron (0.3 to 0.8 micron) particles can be effectively captured.
The primary objective of this research is to model the steady state performance of coalescing filter media made of glass fibers with or without polymer nanofibers and to validate with experimental data. Coalescence filtration involves the capture of small liquid droplets from an air stream. The filter performance can be characterized by the Quality Factor (QF) which accounts for pressure drop and capture efficiency of the media.
A model was developed to predict the performance of filter media augmented with varying amounts of nanofibers. The model calculates single fiber capture efficiencies, filter coefficient, pressure drop, outlet particle concentration, and the quality factor (QF) of the fiber media. The model accounts for aerodynamic slip of the gas flow around the nanofibers. The model predicted that as more nanofibers are added to the filter media, the QF increases, reaches a maximum and decreases.
Experiments were performed with B-glass fibers and Megasol S50 binder media. Increasing amounts of nanofiber were added and the media were tested in a coalescence filtration set up. The experimental results are in accordance with the model predictions that nanofiber incorporated filter media performs better as compared to media without nanofibers.
|School:||The University of Akron|
|School Location:||United States -- Ohio|
|Source:||MAI 57/05M(E), Masters Abstracts International|
|Keywords:||Coalescence filtration, Fibrous filtration, Filter media, Filter performance, Nanofibers|
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