Permeability as a function of gas
Permeability as a function of gas
(OP)
Hi,
Can someone tell me why the permeability of a porous material is greater for nitrogen than for air?
Thanks
Can someone tell me why the permeability of a porous material is greater for nitrogen than for air?
Thanks





RE: Permeability as a function of gas
Air is mostly nitrogen (~79%), but also contains ~20% oxygen, with some carbon dioxide and other trace molecules making up the difference.
Both oxygen and carbon dioxide are larger molecules so they are less likely to be able to fit through the "pores" of the porous materials.
RE: Permeability as a function of gas
David Simpson, PE
MuleShoe Engineering
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