## Write a summary paragraph of all the trends and your results.

Example 6-2: Membrane Reactor

Wolfram

(i)Starting with all values of KC, k, CT0, and kC in the middle range (KC = 0.25, k = 2.1, CT0 = 0.52, and kC = 1.06, all in default units), vary each parameter individually and describe what you find. Note and explain any maximum or minimum values of your plots down the length (i.e., volume = 500 dm3) of your reactor. Hint: Go to the extremes of the range.

(ii) Repeat (i) but set KC at its maximum value and then vary k and kC, and describe what you find.

(iii) After reviewing Generating Ideas and Solutions on the Web site (http://www.umich.edu/~elements/ 5e/toc/SCPS,3rdEdBook(Ch07).pdf), choose one of the brainstorming techniques (e.g., lateral thinking) to suggest two questions that should be included in this problem.

(iv)Write a conclusion from your experiments in (i) through (iii).

Polymath

(v) Vary ratios of parameters such as (k/kC) and (k τ CA0/KC) [note:

τ = 400 min] and write a paragraph describing what you find. What ratio of parameters has the greatest effect on the conversion X = (FA0 – FA)/FA0? (Trial and Error Solution)

(vi)Include pressure drop with α = 0.002 dm–3 and compare the conversion profiles for the two cases.

(vii)Write a summary paragraph of all the trends and your results.

(viii)Make up a question/problem on membrane reactors with a solution in which Wolfram must be used to obtain the answer. Hint: See Preface, Table P-4, page xxvii. Also comment on what types of questions would you ask when using Wolfram.

### design suitable bearings to support the load for at least 5E8 cycles at 1 200 rpm using deepgroove ball bearings.

The shaft shown in Figure P11-4 was designed in Problem 10-19. For the data in row (a) of Table P11-1, and the corresponding diameter of shaft found in Problem 10-19,….

### Find the minimum film thickness for a long bearing with the following data: 30-mm dia, 130 mm long, 0.0015 clearance ratio, 1 500 rpm, ISO VG 100 oil at 200°F, and supporting a load of 7 kN.

1.       A paper machine processes rolls of paper having a density of 984 kg/m3. The paper roll is 1.50-m OD X 22-cm ID X 3.23-m long and is on a simply supported, 22-cm OD, steel….

### Find the minimum film thickness for a bearing with these data: 30-mm dia, 25 mm long, 0.0015 clearance ratio, 1 500 rpm, ON = 30, ISO VG 220 oil at 200°F.

1.       Problem 7-12 estimated the volume of adhesive wear to expect from a steel shaft of 40 mm dia rotating at 250 rpm for 10 years in a plain bronze….