Rework the learning problem from 18B.8, but this time include the contribution from the radius of the
Question:
In studying the rate of leaching of a substance A from solid particles by a solvent B, we may postulate that the rate-controlling step is the diffusion A from the particle surface through a stagnant liquid film of thickness ( out into the main stream (illustranted in Fig. 18B.8). The molar solubility of A in B is cA0, and the concentration in the main stream is CA(.
Fig.18B.8 Leaching of A diffusion into a stagnant liquid film of B.
Shell Mass Balances and Concentration Distribution in Solids and in Laminar Flow
(a) Obtain a differential equation for as a function of z by making a mass balance on A over a thin slab of thickness Î z. Assume that DAB is constant and that A is only slightly soluble in B. Neglect the curvature of the particle.
(b) Show that, in the absence of chemical reaction is the liquid phase, the concentration profile is linear.
(c) Show that the rate of leaching is given by
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Related Book For
Statistics For Business And Economics
ISBN: 9780132745659
8th Edition
Authors: Paul Newbold, William Carlson, Betty Thorne
Question Posted: