ChE 150B Problem Set 13 Due November 29, 2010
Problem 1. (25 Points) Consider the commercial application of membrane separators discussed in Seader and Henley Chapter 14: Gas is fed to a membrane separator at 450 psia and 200oF, with the following compone
ChE 150B Problem Set 11 Due November 19, 2010 Problem 1. (20 Points) Using the data below, construct the following graphs: (a) An equilateral ternary diagram of acetone as the solute, water as the carrier, and 1,1,2-trichloroethane as the solvent. Be sure
ChE 150B Problem Set 10 Due November 5, 2010 Problem 1. (30 Points) It is desired to reduce the ammonia content of 0.05 m3/s of an ammonia-air mixture (300 K and 1 atm) from 5.0 to 0.04 mol% by water scrubbing. There is available a 0.3-m-diameter tower pa
ChE 150B Problem Set 10 Due October 29, 2010 Problem 1. (30 Points) In the figure below, the heavier components in a slightly superheated hydrocarbon gas are to be removed by absorption at 400 psia (2,760 kPa) with a high-molecular-weight oil. [The diagra
ChE 150B Problem Set 8 Due October 22, 2010
1. (40 points) Vapor-liquid equilibrium data for mixtures of water and isopropanol at 1 atm (101.3 kPa, 760 torr) are given below. (a) Prepare T-X-y and x-y diagrams. (b) When a solution containing 40 mol% isopr
ChE 150B Problem Set 7 Due October 15, 2010 Problem 1. (10 points) Consider an adiabatic equilibrium flash. The variables are all as indicated in Figure 1 below. (a) Determine the number of variables. (b) Write all the independent equations that relate th
ChE 150B Problem Set 6 Due October 10, 2010 Problem 1. (20 Points) The air entering a dryer has a temperature of 65.6oC and a dew point of 15.6oC. Using the humidity chart, determine the actual humidity and percentage humidity. Calculate the humid volume
ChE 150B Prolem Set 5 Due October 1, 2010 Problem 1. (20 points) To raise the oxygen concentration in wastewater, air is injected through spargers located near the bottom of a water-holding tank. Oxygen is transferred from the released air bubbles into th
ChE 150B Problem Set 4 Due September 24, 2010
Problem 1. (20 points) Trichlorethane, Cl3CCH3 (TCA), is used to chlorinate films of SiO2 grown by thermal oxidation. A semiconductor fabrication process has been proposed involving the evaporation of the TCA
ChE 150B Prolem Set 3 Due Friday, September 17, 2010 Problem 1. (25 Points) This problem is a continuation of Problem 4 in Problem Set 2. To proceed, you will need to solve the differential equation obtained that was derived for absorption into a falling
Chemical Engineering 150B Problem Set 2 Due Friday, September 10, 2010
Prolem 1. (20 Points) An Arnold cell is partially filled with liquid toluene. The temperature is 298 K and the total system pressure of the gas headspace and surrounding atmosphere is
Chemical Engineering 150B Problem Set 1 Due Friday September 3, 2010
Problem 1. (15 points) Using Fick's law for a binary mixture, prove the following relations, a) The diffusion coefficient of A in B equals the diffusion coefficient of B in A b) JA + JB
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 #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 #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 #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 #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