Chemical Process Synthesis B.E Question Paper : jaduniv.edu.in
Name of the University : Jadavpur University
Department : Chemical Engineering
Degree : B.E
Subject Name : Chemical Process Synthesis
Sem : II
Website : jaduniv.edu.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/dspace.jdvu.ac.in/6579-Chemical%20Process%20Synthesis.pdf
Chemical Process Synthesis Question Paper :
B. Chemical Engineering Final Examination, 2008 :
( 2nd Semester, Supplementary )
Time : Three hours
Full Marks : 100
Related : Jadavpur University Mathematical Modelling in Chemical Engineering B.E Question Paper : www.pdfquestion.in/6578.html
Answer question no. 3 and any five from the rest
1. There is a hat stream Sh1, in a chemical plant with an inlet temperature of 400oC and heat capacity flow rate of 100 units to be cooled to 200oC. In the same chemical plant, there are two more cold steams Sc1 and Sc2 with their inlet temperature as 100oC and 200oC respectively to be heated to 150oC and 250oC respectively. Heat capacity flow rates Sc1 and Sc2 are assumed to be 200 units each. Show different ways in which the task can be achieved. Show those with the help of diagrams. Show also that the order of contacting hot and cold streams is extreamly important. 6+10
2. a) State the deduction theorem of propositional logic and prove it.
b) MgO, H2, O2 and C are raw materials and can perform the following reactions.
MgO +H2 ®Mg + H2O
C + O2 ® CO2
CO2 +H2O® H2CO3
Draw a flow sheet for the production of H2CO3 using deduction theorem of propositional logic. 4+12
3. Water is flowing through network shown above. This network is to be analysed using Hardycross procedure. Length of the pipe in ft, inside diameter of the pipe in inch and fanning friction coefficient are shown against each pipe line in order. Length L is not known. Find the flowrate and pressure drop in each pipe line using Hardy Cross method (complete one iteration and find the corrected flow rate in each member. Use this corrected flowrate for pressure drop calculation). Initial guess of flow rate at some members are suggested in the figure. 20
4. Draw an optimal separation flowsheet to achieve goals G1, G2 & G3, when two streams S1, S2 are available. The order of achieving the goal is G2, G1, G3 .
Stream XA XB
S1 3 7
S2 7 3
G1 2 0
G2 2 7
G3 6 3
Use Mortard rule.
5. Develop the material balance equations afterputting the split fraction coefficients. Show the equations in matrix form and write the first estimate of the split fraction coefficients with reasoning. (Fig(1) may be refered. The yield is 60% and conversion per pass is 80%. 16
6. Rawmaterials and reaction list is given below and the goal G is a mixture of A6 and B7. Draw a steady state flow diagram for the purpose.
Raw Species Temp Press Reaction Input Output Temp,oC Press mat. (liq) oC atm atm
S1 A5, B4 30 2 A1, A2 A1, A3, A5 100 2
S2 A2, B3 25 1 A3, A5 (i) A6, A3 90 1 (liquid)
(ii) A7, A5 (gas)
S3 A1, B1, B2 25 1
S4 A8, A9 30 1
S5 A11, B7 25 1 A3, A8 A9, A16 50 1
7. Write short notes on the following (any four)
i) Guide rule for estimating split fraction coefficients for absorption or stripping column.
ii) FLOWTRAN
iii) Manning equation for pipe friction.
iv) Linearization method for analysis of pipe line network.
v) Main constituent featues of full steady state simulation programs for computer aided flowsheeting.
Biochemical Engineering :
Time : Three Hours
Full Marks – 100
(50 marks for each Part)
Use a separate Answer Script for each Part :
Part – I :
Answer any Two questions from Group A and One question from Group B :
Group A :
1. Deduce the heat transfer relationship with respect to heating and colling of medium undergoing fermentation in a bioreactor, considering Newton’s law of heat transfer. 16
2. Discuss the different physical mechanisms of collection of aerosol by fibrous media. Discuss one of the mechanisms by which air becomes sterile.
3. Write short notes on (any two)
i) Discuss the importance of Monod equation in case of batch fermentation.
ii) Discuss in brief the function of the occessories associated with a fermenter with the help of a neat sketch.
iii) Design of a culture medium.
iv) Importance of screenins to find out suitable microbial cultures of industrial importance.