| For 6" thick traps, 3 lb/ft^3 is the best from the range you listed.
Yes, I am writing the lightest of the density range you listed. The effectiveness of the absorber is a function of the gas flow resistance at the the surface of the absorber. The thicker the material the lower the resistivity per inch thickness is better. That is within the range of densities of materials we normally use and thicknesses.
Absorbent, and light,
Andre |