﻿692 Mr. D. 0. Henry on a 



The n relations (0) determine the equilibrium adsorptions 

 of the n components. 



In a similar manner we can write for the velocity of 

 adsorption of S r in gm. -molecules per second 



dx r r X Y X n ~\ ar „ „ /Qv 



where x r is the instantaneous value of the adsorption of S,. at 

 time t, and p r is the instantaneous value of the corresponding 

 partial pressure. A similar relation holds for each of the 

 n components. 



The Temperature Coefficient of the. -Isotherm. 



The effect of temperature on the equilibrium adsorption 

 follows from equation (6), the only constant of which that 

 involves the temperature being f, which from equation (7) 

 is given by 



f.^. !'..«&, (io) 



where ? is a constant independent of the temperature. The 

 qualitative conclusion that adsorption decreases with rise of 

 temperature follows immediately. 



The relations (6) and (9) do not admit of general solutions. 

 Solutions must therefore be obtained for special cases. 



One Component only — Adsorption of a single Gas. 

 . Equation (6) reduces to 



X = &)[l-JJ, (11) 



which can be expressed 



ln|=lnr+a.ln[l-J] (12) 



. . , rX 1 X 2 "I 



For moderately small adsorptions we can use the approxi- 

 mation 



In- =lnf-^X, 



or log- = log f- 0-4343 . ^ . X. . . . (13) 



The relation (13) is of the same form as that obtained by 



