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16-CHEM-AS5,
Chemical
Plant
Design
and
Economics
December
2018
16-CHEM-AS,
CHEMICAL
PLANT
DESIGN
and
ECONOMICS
NATIONAL
EXAMS
-
DECEMBER
2018
3
hours
duration
NOTES
1.
Ifdoubt
exists
as
to
the
interpretation
of
any
question,
the
candidate
is
urged
to
submit
with
the
answer
paper,
a
clear
statement
of
any
assumptions
made.
2
The
examination
is
a
CLOSED
BOOK
EXAM.
One
aid
sheet
allowed
written
on
both
sides.
3.
Candidates
may
use
approved
Sharp/Casio
calculator.
4.
Five
(5)
questions
constitute
a
complete
exam
paper.
5.
The
questions
are
of
equal
value
(20
points
each).
6.
Only
the
first
five
questions
as
they
appear
in
the
answer
book(s)
will
be
marked.
7.
Clarity
and
organization
of
the
answer
are
important.
For
questions
that
require
calculations,
please
show
all
your
steps.
8.
State
all
assumptions
clearly
1of3
Ql.
Q2.
16-CHEM-AS5,
Chemical
Plant
Design
and
Economics
December
2018
The
catalytic
dehydrogenation
of
propane
(C3Hs)
is
carried
out
in
a
continuous
packed-bed
reactor.
1000
kg/hr
of
pure
propane
is
preheated
to
a
temperature
of
670
°C
before
it
passes
into
the
reactor.
The
reactor
effluent
gas,
which
includes
propane,
propylene
(C3Hs),
methane
(CHs)
and
hydrogen,
is
cooled
from
800
°C
to
110
°C
and
fed
to
an
absorption
tower,
where
the
propane
and
propylene
are
dissolved
in
oil.
The
oil
then
goes
to
a
stripping
tower
in
which
it
is
heated,
releasing
the
dissolved
gases.
These
dissolved
gases
are
recompressed
and
sent
to
a
distillation
column
in
which
the
propane
and
propylene
are
separated.
The
propane
stream
is
recycled
back
to
join
the
feed
to
the
reactor
preheater.
The
product
stream
from
the
distillation
column
contains
98%
propylene,
and
the
recycle
stream
is
97%
propane.
The
stripper
oil
is
recycled
to
the
absorption
tower.
a)
[8
points]
Draw
a
flowsheet
for
the
entire
process.
Label
all
feed,
product,
and
connecting
streams
between
units.
b)
[12
points]
Write
clear
statements
of
the
overall
objective
of
the
process
and
the
functions
of
each
of
the
process
units.
A
process
has
been
developed
for
a
new
product
for
which
has
the
market
is
uncertain.
A
plant
to
produce
50,000
tons/year
requires
an
investment
of
$10
x
10%,
and
the
expected
project
life
is
5
years.
Fixed
operating
costs
are
expected
to
be
$7.5
x
10°
per
year,
and
variable
operating
costs
(excluding
raw
materials)
is
expected
to
be
$40/ton
of
product.
The
stoichiometric
raw
materials
costs
are
$80/ton
of
product.
The
yield
of
product
per ton
of
raw
material
is
80%.
Tax
is
paid
in
the
same
year
as
the
relevant
profit
is
made
at
a
rate
of
35%.
Calculate
the
selling
price
of
the
product
to
give
minimum
acceptable
discounted
cash
flowrate
of
return
of
15%
per
year.
20f3
Q3.
Q4.
Qs.
Q6.
16-CHEM-AS,
Chemical
Plant
Design
and
Economics
December
2018
Pilot
plants
are
complete,
medium-scale
processing
units
that
contain
all
essential
product-
producing
elements,
including
control.
The
conversion
of
laboratory
data
from
the
research
group
into
plant
design
data
is
only
one
function
of
the
pilot
plant.
After
a
new
plant
or
process
is
designed,
the
pilot
plant
continues
investigations
of
problems
that
require
the
elimination
of
the
compromise
acceptance
of
data.
List
and
describe
the
top
five
important
items
to
be
considered
in
a
pilot
plant
investigation.
List
and
describe
the
top
six
important
technical
factors
to
consider
in
the
design
of
a
full-
size
commercial
plant.
The
design
of
a
full-size
chemical
plant
must
not
only
be
technically
satisfactory,
but
also
must
be
economically
satisfactory;
the
goal
of
the
design
is
to
secure
a
workable
plant
with
maximum
return
on
the
necessary
investment.
List
and
describe
the
top
four
important
economic
factors
to
consider
in
the
design
of
a
full-size
commercial
plant.
A
pharmaceutical
plant
manufacturing
bulk
drugs
uses
acetone
for
final
purification
of
a
product.
After
filtration,
the
wet
cake
is
dried
in
a
fluidized-bed
dryer
in
which
nitrogen
is
used
as
a
drying
medium.
The
off
gases
from
the
dryer
is
saturated
nitrogen
with
vapor
of
water
and
acetone
at
near
atmospheric
pressure
and
75-90
°C.
Local
pollution
control
authority
requires
that
the
emissions
from
the
dryer
must
contain
acetone
below
200
ppm.
Suggest
a
process
scheme
such
that
the
final
gas
mixture
meets
the
local
pollution
authority’s
requirement
with
reasons
for
selection
of
the
scheme.
30f3
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Give the nuclear symbol (isotope symbol) for the isotope of bromine, Br, that contains 46 neutrons per atom. Replace the
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- B Quizzes - SCH3UE-15-Chemistry- X + A tdsb.elearningontario.ca/d2l/Ims/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=19297865&isprv=&drc=1&qi=5956344&cfql=0&dnb=D0... 2 E TDSB Bookmarks P Summary - PayPal Steam Guard Mobil.. M Booter Panel ul Asylum Stresser - H.. A Free Stresser - The. 6 Str3ssed Booter - L. O Home | IP Stresser 3 - Packages >> What can be added to a solution containing Sr2*(aq) ions to precipitate the ions from the solution? potassium sulfate barium hydroxide O lithium nitrate Two of the above are correct. (a). (b), and (c) are all correct. 围 i 11:15arrow_forwardB Quizzes - SCH3UE-15-Chemistry- X + A tdsb.elearningontario.ca/d2l/Ims/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=19297865&isprv=&drc=1&qi=5956344&cfql=0&dnb=D0... 2 E TDSB Bookmarks P Summary - PayPal Steam Guard Mobil. Booter Panel l Asylum Stresser - H. A Free Stresser - The. O Str3ssed Booter - . O Home | IP Stresser 3 - Packages >> In testing for the presence of lead(II) ions in solution, Jamaal adds a solution of sodium nitrate. What will be the conclusion of the test if no precipitate forms? Lead(II) ions are not present in solution. Lead(II) ions are present in the solution. Lead(II) ions are present, but in a very small concentration. More sodium nitrate solution needs to be added before a conclusion can be made. No conclusion can be made in this test. 围 1 11:14arrow_forwardESF X empt/quiz_start_frame_auto.d21?ou=9739790&isprv=&qi=11007766&cfql=0&dnb=0&fromQB=0&inProgress=1 ystems Question 5 (1 point) Ben starts walking along a path at 3 mi hr¹. Amanda starts jogging along the same path 1 hour later at 5 mi hr. After how much time jogging does Amanda catch up to Ben? 3.5 hr 2.5 hr 2 hr 16arrow_forward
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