Download SGBAU (Sant Gadge Baba Amravati university) B-Tech/BE (Bachelor of Technology) 6th Sem FPOPC Petro Petrochemical Technology III Previous Question Paper
11048 : Petrochemical Technology-III (Special Technology-III) : 6 PC 04
AW - 3263
?ll!!!"tll?ll Max. Marks : 80
P. Pages : 3
Time : Three Hours
Notes : 1. Due credit will be given to ncatncss and adequate dimensions.
2. Assume suitable data wherever necessary. .
3. Diagrams and chemical equations should be given wherever necessary.
4. Illustrate your answer necessary with the help of neat sketches.
5. Discuss the reaction, mechanism wherever necessary.
6. Use of Re?nery Engg. Charts and combustion charts permitted.
7. Use of pen Blue/Black ink/relill only for writing the answer book.
SECTION ? A
1. Estimate the bubble point temperature and compositiun of vapour formed, of a fractional l3
overhead at 130 psi pressure. The overhead has following composition.
i) Propane = 05%
ii) i-butane = 85% &
iii) n-butane = 10%
OR
2.- State the Rault?s law and Dalton's law and derive an expression for equilibrium composition 13
of vapour and liquid for the multicomponent system in term of total pressure (1:) . vapour
pressure (P10, P3 ,P39, ....... ) and feed composition (Fl, F2. F3, ....... ) .
3. u) Mention the basic information that is provided by the crude assay about crude oil. 2
b) From which point of view characterimtion of crude oil is necessary? ' 3.
c) The experimental ASTM data for a petroleum fraction is given below. Compute the EFV 8
curve from this data by Edmister's method.
%Distillate ! IBP 10 ?< 30 1 50 70 l 90 FBP
Temp. ?C 265 271 273 ? 284 293 l 300 313
OR
4.? a) Mention the various additive and non-additive properties of petroleum and petroleum 3
fractions.
b) What are the various types of distillations practiced in re?nery engineering calculations? 10
Mention their signi?cances and compare them with all respect.
5. The 'l?BP distillation data at atmospheric pressure obtained for 35 OAPI gravity crude oil 14
is reponed as follow
% Distillate IBP 10 30 50 70 90 FBP
Temp. ?C 75 185 280 350 415 490 550
successive ?ash vaporization is carried out for the above crude oil in the following manner:
AW ? 3203 l P.T.O
6.
7. (H
b)
c1
d1
8. 111
[11
C)-
db
9.
10
i) lSl ?ush ? 40% material
ii) II'1d ?ash 7 Remaining 111ateriul
(?nmpute the temperature required to \apourise 70% material by single and double
?ash vaporization.
()R
The ASTM distillation data for aggpline fraction of 65 ?API gravi ' is given below
, % Distillate IBP ? 10 3O 50 ? 70 90 100
i___ Temp.?C 130 ? 137 146 153 i 163 177 205
constmct the phase diagrmn and calculate the temperature required to vaporize 70%
material at 201
On which test design of re?nery distillation column tests on?
How degree-of separation (ti?actionationt is measured?
How the design of fractionation system can be outlined?
Mention the typical operating data for vacuum distillation column.
OR
111 vacuum distillation. 011 ?hich factor unwunt of steam required depends on?
\\ m are the main prO'Jueis ut'commcrciul interest that can be obtained from vacuum
distillation?
Mention the ASTM gaps that are generally followed in practice in petroleum re?neries.
State the signi?cance of ?11511 zone operating conditions.
Mention the important factors that affect the radiation from ?ames in tube still heaters.
How these factors are related by Wilson. lobe and Hottel?
OR
A tube still heater is designed for a heat duty of 50.000000 Btu/Ilr. If the overall ef?ciency
of tube still heater is 80% and fuel oii with net heating value of 17200 Btu/Ib is to be ?red
with 25% excess air (1.7.5 [bxlb fuel) with the air being preheated to 400 ?F, steam is used
for atomizing at a rate of OBIb/Ib ot?fuel zit 190"F The tube still heater tubes are of 5.0 inch
OD. 38.5 ft long and 10 inch spacing arranged in single row, and 1500ft2 of projected area
is available
1) Hair (400?F) = 82 Btu/"Ib iii) Hsteum (190?F) = 95 Btu/lb
iii) H?uc gas (17300F) :: 148 BtU/h]
Calculate :
i) \Jumber oftubes required in radiant section.
ii) "/6 Heat absorbed in convection
AW - 3263 2
l4
ll.
12.
3)
b)
C)
d)
a)
b)
d)
What affects the hcight and diame'tcr of the stack?
Mention the factors responsible for failure ofignition of fuel in the oil ?red burners.
What is the heating value of methane expressed as BTU per cubic ??
Why excess air is required for combustion of fuels? Mention the excess air requirement of
fuels when ?red in pipe still heaters and boilers.
OR
What arc the causes for long and splullcry ?ame when liquid ?xels are ?red in burners?
What do you understand by
i) Heating value
ii) Net heating value and
iii) Gross heating value
On which factors selection of products to be produced in the re?nery depends on?
Compute the net heating value of fuel oil?S in the data table.
*******
AW - 3263 3
Ch
This post was last modified on 10 February 2020