Page 231 - Elements of Chemical Reaction Engineering 3rd Edition

Chap. 4 Sumrnary 203

2. Pressure drop in isothermal reactors
a. Variable density with E # 0:
P
Y=-
PO

(34-9)

b. Variable density with E = 0 or EX* 1 and isothermal:

-- - (1 -aW)'" (s;4- IO)
PO
3. For semibatch reactors, reactant B is fed continuously to a vat initially
containing only A:

A-I-B __j C

a. In terms of conversion:
dX
N - = - (S4-11)
A r*V
' dt
b. Rate law:

(S4-12)

I.' = vo + U0t (S4- 13)

(S4-14)

(S*4-15)

Equations (S4-11) through (S4-15) are combined and the resulting
equation is solved numerically for conversion as a function of time.
c. In terms of concentrations,