AZB 40500 36000 31500 27000 22500 18000 13500 9000 4500 290 305 320 335 350 365 380 395 410 425 440 T (K) G(T), cavmol
The reversible liquid phase reaction is carried out in a 12-dm3 CSTR with heat exchange. Both the entering temperature,T0, and the heat exchange fluid,Ta, are at 330 K. An equal molar mixture of inerts and A enter the reactor.
(a)Choose a temperature,T, and carry out a calculation to findG(T) to show that your calculation agrees with the corresponding G(T) value on the curve shown below at the temperature you choose.
(b)Find the exit conversion and temperature from the CSTR.X=_____T=_____.
(c)What entering temperatureT0would give you the maximum conversion?
T0= _____ X = _____
(d)What would the exit conversion and temperature be if the heat exchange system failed (i.e., U = 0)?
(e)Can you find the inlet ignition and extinction temperatures? If yes, what are they? If not, go on to the next problem.
(f)Use Preface Section I to ask another question.
Additional information
TheG(T) curve for this reaction is shown below
CPA = CPB = 100 cal mol K, C PI = 150 c al mol k = 0.001 h −1 at 300K with E = 30,000cal/mol
FA0 =10 mol h, CA0 = 1 mol dm 3 , v0 = 10 dm3/ h KC = 5,000,000 at 300 K
ΔHRx = −42,000 cal mol UA = 5000 cal/h/K
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