Chemical Engineering 142 Homework Set #10 100 points total Due Wednesday April 14, 2010
Problem 1 (25 points) Consider the case of oxygen diffusion through a porous matrix to react with a core of carbon (shrinking core with porous matrix problem) that is
Chemical Engineering 142 Homework Set #8 300 points total (This set is treated as 3 separate sets) Due Wednesday March 31, 2010 Problem 1 (40 points) Consider the first-order, irreversible exothermic liquid-phase reaction
This reaction is carried out in a
Chemical Engineering 142 Homework Set #6 100 points total Due Wednesday, March 3, 2010
Problem 1 (20 points) The following elementary, liquid phase reaction
A B
is carried out in an isothermal PFR with a recycle stream. If the conversion of A is 0.75 when
Chemical Engineering 142 Homework Set #11 100 points total Due Wednesday April 21, 2010
Problem 1 (35 points) The irreversible reaction, A B, is taking place in the porous catalyst slab shown in the figure below. The reaction is zero order in A.
(a) Show
Chemical Engineering 142 Homework Set #12 100 points total Due Wednesday, April 28, 2010 Problem 1 (60 points) The gas-phase reaction, , takes place in a CSTR at steady state. Spherical pellets catalyze the reaction and the kinetics can be described by th
Chemical Engineering 142 Homework Set #9 100 points total Due Wednesday, April 7, 2010 Problem 1 (20 points) A possible mechanism for the reduction of NO by CO on a Pt catalyst consists of the following elementary steps
NO + * NO *
K1 K2 K3 k4
CO + * CO *
Chemical Engineering 142 Homework Set #7 100 points total Due Wednesday, March 10, 2010 Problem 1 (25 points) The dehydrogenation of ethanol (A) to acetaldehyde (B) and dihydrogen (C) is carried out in an adiabatic reactor.
A B +C
Pure ethanol at 400 C is
Chemical Engineering 142 Homework Set #5 100 points total Due Wednesday, February 24, 2010
Problem 1 (50 points) Consider a gas-phase reaction that occurs via the following sequence of elementary steps:
A 1 A A + A 2 B + C
k
k
k1 = 0.44 s-1 k2 = 1.6 L-1
Chemical Engineering 142 Homework Set #4 100 points total Due Wednesday, February 17, 2010 Problem 1 (20 points) Consider the following elementary steps in the gas phase oxidation of NO, which involves the intermediate NO3 Step 1 Step 2 The reverse rate o
Chemical Engineering 142 Homework Set #3 100 points total Due Wednesday, February 10, 2010 Problem 1 (30 points) Consider the following gas phase reaction for the formation of formaldehyde:
CO +H 2 HCHO
r = k f C COC H 2 k r C HCHO
kf = Kc kr Where KC is
Chemical Engineering 142 Homework Set #1 100 points total Due Wednesday, January 27, 2010 Problem 1 (30 points) A liquid phase reaction, 3A 2B + 4C, occurs in an isothermal flow reactor running at steady-state. The volumetric flow rate is constant at 4 L
Chemical Engineering 142 Homework Set #2 100 points total Due Wednesday, February 3, 2010 Problem 1 (20 points) Consider the reactor scheme below, Make-up Stream
Reactor 1
Reactor 2
A liquid phase reaction, A + 2B C, occurs at steady-state according to th