Page 540 - Elements of Chemical Reaction Engineering Ebook

51 0 Steady-State Nonisothermal Reactor Design Chap. 8

12. Bifurcation analysis (CD-ROM) is used to find multiple steady states.
At the bifurcation point, y*,
F(y*) = 0 = ci Y * - P - G(Y*) (S8-14)

(S8- 1 5)

Multiple steady states will not exist if

(S8-16)

13. When q multiple reactions are talung place and there are m species,

I I

r
ODE SOLVER
ALGORITHM

Packed-Bed Reactor with Heat Exchange and Pressure Drop

cx = 0.019/kg cat.
C,, = 0.25 mol/dm3
UA/pc = 0.8 J/kg cat. s K
dY
- -- (1 -0.5X)(T/To)
=
dW 2y T, = 500 K
r;\ = -k[Ci-Cc/Kc] AH:, = -20,000 J/mol
CA = CAO[(l -X)/(l -OSX)](To/T)(y) Cp, = 40 J/mol* K
Cc = iCAoX(To/T)y/( 1 - OSX) FA, = 5.0 mol/s
To = 450 K
k = 0.5 exp [5032(( 1 /450) - (l/T))I
Wf = 90 kg cat.