Pune University BE Chemical Engineering Petroleum Refining Technology Question Papers

B.E. (Petroleum) PETROLEUM REFINING TECHNOLOGY (2008 Pattern) (Elective – II) (Sem. – I)

Time: 3 Hours]                                                                                              [Max. Marks :100

Instructions to the candidates:

1)            Answer 3 questions from each section.

2)            Answers to the two sections should be written in separate answer books.

3)            Figures to the right indicate full marks.

4)            Use of logarithmic tables slide rule, Mollier charts, electronic pocket calculator and steam table is allowed.

5)            Assume suitable data, if necessary.


Q1) a) Draw a neat labeled diagram of the overall refinery flow.              [4]

b)            Write a note on the composition of crude oil.                                               [8]

c)            Explain the terms :                                                                                             [6]

i)              Octane number.

ii)           Conradson Carbon Residue.

iii)         Flash point.


Q2) a) Write a note on the middle distillate fuels.                                         [8]

b)           What do you understand by True Boiling Point distillation (TBP)? Explain.   [6]

c)           Give the significance and the uses of butane which is obtained as a low boiling product in the refinery.                                                                                           [4]

Q3) a) Give the need for desalting of crude oil. Draw a neat labeled diagram of a single stage desalting process.                                                                            [8]

b) Explain in brief the process of distillation in Atmospheric Topping Unit (ATU).           [8]


Q4) a) Explain how vacuum is maintained in the vacuum distillation unit. [8] b) Write a note on the auxiliary equipment used in ATU and VDU. [8]

Q5) a) Write a note on the various methods of decoking.                           [8]

b) With the help of a neat labeled diagram, explain the working of a fluid catalytic cracking (FCC) unit.                                                                                [8]


Q6) a) Write a note on the expanded bed hydrocracking process.             [8]

b) Write a note on the hydrocracking catalysts.                                                     [8]


Q7) a) Compare the hydrofluoric acid process and the sulphuric acid process for alkylation.      [8]

b) Explain the important reactions that take place in a catalytic reformer.



Q8) a) Explain and give the significance of isomerization process.          [8]

b) Write a note on the alkylation catalysts.                                                             [8]

Q9) a) Discuss the process of phenol extraction used in treating of lubes. [8]

b)            What is dewaxing? Discuss any one of the commercial dewaxing processes. [8]


Q10)a) Explain in brief the various processes that enhance the characteristics of lube oil.            [8]

b)                                                                                                                                                                                                                                                                          Discuss the typical propane deasphalting unit.                                                                                          [8]


Q11)a) Discuss the various reactions that take place during the production of hydrogen by steam reforming.                                                                            [10]

b)            Discuss the recovery of hydrogen by adsorption process.                          [4]

c)            Draw a neat labeled diagram of the once-through Claus process for sulphur recovery.                                                                                                                     [4]


Q12)a) How is atmospheric pollution in refineries controlled?                 [6]

b)            Give the necessity of product blending. Explain in brief about the parameters to be considered in the octane number blending process. [8]

c)            Draw a neat diagram of line blending process.                                             [4]

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