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P 1 2 - 1 5 The first - order, irreversible, exothermic liquid - phase reaction A - > B is to be carried out
P The firstorder, irreversible, exothermic liquidphase
reaction
A B
is to be carried out in a jacketed CSTR Species A and
an inert I are fed to the reactor in equimolar amounts. The
molar feed rate of A is molmin
Additional information:
Heat capacity of the inert: calmol C tau min
Heat capacity of A and B: calmol C Delta HRx calmol
UA: calmin
C k times min
at K
Ambient temperature, Ta
: K E calmol K
a What is the reactor temperature for a feed temperature
of K
b Plot and then analyze the reactor temperature as a
function of the feed temperature.
c To what inlet temperature must the fluid be preheated
for the reactor to operate at a high conversion? What are
the corresponding temperature and conversion of the fluid
in the CSTR at this inlet temperature?
d Suppose that the fluid inlet temperature is now heated
deg C above the reactor temperature in part c and then
cooled deg C where it remains. What will be the
conversion?
e What is the inlet extinction temperature for this
reaction system? Ans: T deg C
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