collected, the
amount
of
material left in
the
still pot,
and
the
average
concentration
of
distillate. Pressure is 1 atm. Equilibrium data are given in Table 2-7.
03.*
We wish
to
use a distillation system with a still
pot
plus a
column
with
one
equilibrium
stage
to
batch distill a mixture of
methanol
and water. A
total
condenser
is used.
The
feed
is
57 mol % methanol. We desire a final
bottoms
concentration
of
15 mol %
methanol. Pressure
is
101.3 kPa. Reflux
is
a saturated liquid,
and
Lo/D
is constant at
1.85.
Find
Wfinal'
Dtotal'
and
XD
,
avg'
Methanol-water equilibrium data
are
given in Table·
2-7 Calculate
on
the
basis
of
1 kmol
of
feed.
.
D4. We wish
to
do
a simple batch distillation
(1
equilibrium
contact)
of
a mixture
of
ace-
tone
and
ethanol.
The
feed charge
to
the
still
pot
is
80 mol % acetone.
The
final con-
centration in
the
still
pot
will
be
40 mol % acetone.
The
final
amount
of
material-
in
the
still
pot
is
2.0 kmole. Vapor-liquid equilibrium
(VLE)
data
are
in
Problem
4.D7.
Find·
the feed
amount
F,
the
average mole fraction
of
the
distillate,
and
the
kmoles
of
distil-
late collected.
05.
A simple batch distillation
is
being
done
to
process a feed containing water and
n-
..
butanol that is 52
mol%
water.
The
feed
to
the
still
pot
is
3.0 kmol.
The
final still
pot.
concentration should
be
28 mol % water.
Equilibrium
data are in Table 8-2.
3.
Find W
final
(final
amount
in
the
still pot, kmole),
Dv,tot
(total
amount
of
distillate
vapor collected, kmole), and
YD,avg
(average mole fraction water in the vapor distillate).
b.
After
the
distillate vapor
is
condensed in
the
total condenser,
the
liquid is
sent
to
the
settler. Two distillate liquid products
are
withdrawn. Find
the
total
amounts
· of
each distillate liquid collected,
Dl
(with x
D1
,
water
= 0.573)
and
D2
(with x
D2
,water=
0.975), in kmoles.
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- Fall '08
- Scott,S
- Equilibrium, Distillation, Batch distillation, kmoles, Dtotal, mount o
-
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