2078.     LEDOUX, E.  Avoiding Destructive Velocity Through Absorbent Beds.  Chem. Eng., vol. 55, No. 3, 1948, pp. 118-119; Chem. Abs., vol. 42, 1948, p. 3221.

        Dimensionless expression is derived for the maximum safe mass velocity of the gas, G which will not cause motion of the adsorbent bed, with attendant reduction in size owing to abrasion.  The equation given is G₂=0.0167 Dgd_gd_a, where D is diameter of average particle, g is acceleration of gravity, d_g is density of the gas, and d_a is apparent density of the adsorbent bed.  The constant, 0.0167, was determined from industrial experience.