Question on a Science Lab?

Give us more context and leave out the extra 'and'.

Joe(waiting)Nation

The particles allow a solvent to pass through their structure and are large in area.

Solvent flows into the particles and I suppose solvent flows out of the particles.
What's inside of the particles??

Permeability is generally given in terms of distance per unit time (m/s). Surface area is given in terms of area (m^2). The product of permeability and surface area is volume per unit time.

So this statement tell me that I would expect a column of this material to allow an easy flow of solvemt.

Rap