Page 221 - Elements of Chemical Reaction Engineering Ebook

1 92 Isothermal Reactor Design Chap. 4

The initial volume of fluid in a vat is to be 5 dm3 with a bromine cyanide concen-
tration of 0.05 mol/dm3. The specific reaction rate constant is
k = 2.2 dm3/s. mol
Solve for the concentrations of bromine cyanide and methyl bromide and the rate of
reaction as a function of time.

Solution
Symbolically, we write the reaction as \
A+B+C+D
The reaction is elementary; therefore, the rate law is
(-TA=kCACBJ
Rate Law (E4-11.1)

Substituting the rate law in Equations (4-56) and (4-58) gives

Mole balances on (E4-11.2)
A, B, C, and D

p-? (E4- i .a;!
v = Vo+v,t
1
I Similarly for C and D we have

(E4- 1 1.5)

Then
Polymath will com- dCc = kCACB - y (E4- 1 1.7)
bine for you. Thank
you Polymath!

and

(E4- 1 1.8)

1 We could also calculate the conversion of A.

x=- NAO - NA (E4-11.9)
"40