GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University
Subject Name: Chemical Reaction Engineering - I
Time: 10:30 AM TO 12:30 PM
Date: 19/01/2021
Total Marks: 56
Subject Code: 2170501
GUJARAT TECHNOLOGICAL UNIVERSITY
--- Content provided by FirstRanker.com ---
BE- SEMESTER-VII (NEW) EXAMINATION - WINTER 2020Subject Name: Chemical Reaction Engineering - I
Time: 10:30 AM TO 12:30 PM
Date: 19/01/2021
Total Marks: 56
--- Content provided by FirstRanker.com ---
Instructions:
- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| MARKS | |
|---|---|
| Q.1 | |
| (a) Draw the figures for various ways of studying the flow pattern in vessels. | 03 |
| (b) Explain: 1) Residence time distribution 2) Dirac delta function 3) Early mixing 4) Micro fluid | 04 |
| (c) Explain Step experiment to study the RTD in non- ideal reactor. | 07 |
| Q.2 | |
| (a) Discuss closed vessel boundary condition. | 03 |
| (b) Derive the equation for Ee for single stirred tank reactor. | 04 |
| (c) A sample of tracer was injected as a pulse to a reaction vessel and the effluent concentration was measured as a function of time resulting in following data If the reaction vessel is used to carry out liquid decomposition reaction with rate -ra = kCa, k = 0.1 min™' , Find the mean conversion. | 07 |
| T, min | 0 1 2 3 4 5 6 7 8 9 10 12 14 |
| C, gm/m³ | 0 1 5 8 10 8 6 4 3 2.2 1.5 0.6 0 |
| Q.3 | |
| (a) Write about C pulse curve. | 03 |
| (b) What is Knudson equation? Explain the mechanism of solid catalyzed Gas phase reactions using LHHW model. | 04 |
| (c) Derive BET equation for surface area of catalysts. | 07 |
| Q.4 | |
| (a) Discuss the effect of Henry’s constant value on the solubility of gas in liquid. | 03 |
| (b) Write on ‘Film conversion parameter’. | 04 |
| (c) Define: 1) Catalysts 2) Promoters 3) Inhibitors 4) Poisons 5) Accelerator 6) Coking 7) Sintering | 07 |
| Q.5 | |
| (a) Give examples for various fluid fluid reactions. | 03 |
| (b) Draw diagram for various contacting pattern in two phase system | 04 |
| (c) Air with gaseous A bubbles through a tank containing aqueous Reaction occurs as follows: A(g)+B (l) = R(l) -ra=kCaCb =107 m3/(mol2. hr) For this system kGa =0.1 mol/hr. m3. Pa fl=0.01 m3 liquid/m3 reactor kLa =100 m3 liquid/m3 reactor. hr HA = 106 Pa. m3/mol, very low solubility DA =DB =10-7 m2/hr a =100 m2/m3 For a point in the reactor where pA=100 Pa and CB= 1 mol/m3 For MH < 0.02, we have infinitely slow reaction. (a) calculate the rate of reaction (mol/m3 hr) (b) Resistance offered by the main body of liquid | 07 |
| Q.6 | |
| (a) Write in detail about Progressive conversion model. | 03 |
| (b) Discuss the significance of Effectiveness factor for solid catalysed reaction. | 04 |
| (c) Discuss in brief about slurry reaction kinetics. | 07 |
| Q.7 | |
| (a) Write about mean time and variance. | 03 |
| (b) Write the significance of Thiele Modulus. | 04 |
| (c) For chemical reaction controls, derive expression for relation for time required for unreacted core model for spherical particles of unchanging size. Also find time required for complete conversion. | 07 |
| Q.8 | |
| (a) Give names for the different fluid particle contactors. | 03 |
| (b) Discuss about various types of nonideality exists in non-ideal flow reactors. | 04 |
| (c) Write in brief about catalysts deactivation. | 07 |
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University