Aerogrels have an extraordinarily large internal surface area which is
accessible via open pores, making them candidates for filters and gas
adsorption media. The idea is frequently included in lists of potenti
al applications, but little research has been conducted on the use of
aerogels as filters or adsorption media. Consideration of aerogels for
use as aerosol collection media requires knowledge of the behavior of
gas flow through them. Nitrogen and helium gases at a range of pressu
res from 6-200 kPa were flowed through aerogel and the flow was shown
to be a superposition of molecular diffusion and laminar viscous flow.
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