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D23. We wish ro flash distill 1000
kmol/h of a feed
that
is 40 molyo methane, 5 mol% ethyl_
ene, 35y" mole ethane, and 20 molo/o
n_hexane.
Drum pressure
is 2500 kpa and drum
temperature
is 0.C. Use the Depriester
charts. Find V/Il x1, y;,
!
E
D24, We plan to separate
a mixture or propane
and n_hexane
at 300 kp.r.
a. Using the data
in the Depriester
charts, plot y propane
versus
x propane
1br this
rruxture at this pressure.
b. ff th€
feed
is 30 molo/o
propane,
and 40 mol% of the feed
is vaporized,
what are the
liquid and vapor rnole
fractions,
and what
is the drum temperature?
Solve graphi_
caly
c. What is the drum temperature
in palt b?
d. If y =
0.8 and the feed
is 06
(both
mole
fraction propane),
what
is the value of V/F?
_  _
e. Use
the RachfordRice
equation
to check
the answers
obiained
in parts
b and c.
D25. We wish
to flash distill a mixture of methane and n_butane
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This note was uploaded on 12/29/2011 for the course CHE 128 taught by Professor Scott,s during the Fall '08 term at UCSB.
 Fall '08
 Scott,S

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