CHEN-7250 Homework

Assignment No. 1

Due: 08/25, Mon

Problem 1-17 

Problem 3-17 

Repeat 3-17 (b) using Polymath. Additional Question: (c) Calculate the reaction time to achieve 50% conversion.

Remarks:

Assignment No. 2

Due: 08/29, Fri

1. Derive for C_A as function of time for unsteady-state CSTR under the following condition:

rA = -kC_A, liquid reaction, at t=0, C_A = 0.

2. Starting from Mole Balance Equation of PFR, derive Eq. 4-17 for a second order isothermal gas reaction.

Remarks

Assignment No. 3

Due: 09/03, Wed

Problem 4-7 (a), (b), (e).

Problem 4-12 (a)

Remarks: Ignore cost in 4-7 (e).

Assignment No. 4

Due: 9/05, Fri

(1) 4-7 (f). with a revision: redo (a), (b), (e).

(2) An elementary gas reaction, A ® 2B, is taking place in an unsteady-state CSTR. The reactor is initially filled with an inert gas. At time zero feed containing A only is fed into the reactor. Determine C_A, C_B, C_I as a function of time during the startup period of this reactor. How long would it take for C_B to reach 50% of C_A0? Calculate the steady-state conversion.

Additional information: -r_A = 0.1 C_A mols A/(min,)(L), Pure A is fed into the reactor, P_A0 = 1 atm, T = 300^oK, v₀ = 1 L/min., V = 10 L

Hint: N_T = N_A + N_B + N_I = constant in the reactor,

or C_A + C_B + C_I = constant,

Remarks: Use Polymath where necessary.

Assignment No. 5

Due: 09/08, Fri

(1)

(2) Problem 4-13