1975 Volume 8 Issue 3 Pages 228-232
The limiting Sherwood number between particles and fluid in the low Péclet number region was determined experimentally for liquid-phase mass transfer in packed beds. Experimental results revealed a very large limiting value of Shho=7.4 (or Shpo = 16.7 at εf=0.40), where Shho and Shpo are the Sherwood numbers based on hydraulic diameter and particle diameter, respectively, and εf is the void fraction of the beds. Accuracy of measurement was increased by applying a pulse response method to determine the film coefficients in packed beds which accompanied rapid irreversible neutralization reaction. Also, a special device was utilized to send a plane impulse of the tracer liquor.