課程名稱︰化學反應工程
課程性質︰必修
課程教師︰吳紀聖
開課學院：工學院
開課系所︰化工系
考試日期（年月日）︰102/6/19
考試時限（分鐘）：120
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
1. The elementary reversible liquid phase reaction, A <--> B, takes place in
a CSTR. Pure A enters reactor.
(a) Derive an expression of G(T) as a function of heat of reaction,
equilibrium constant, rate constant, volumetric flow rate, reactor
volume and temperature.
(b) Show a sample calculation of G(T) at T = 400 K.
2. The first order irreversible exothermic liquid phase reaction, A --> B, is
to be carried out in a jacketed CSTR. Species A and inert I are fed to the
reactor in equimolar amounts. The molar feed rate of A is 80 mol/min. What
is the reactor temperature for a feed temperature (T0) of 450 K?
Additional information:
ΔHrx = -7500 cal/mol, CpA = CpB = 20 cal/mol-K,
CpC = 30 cal/mol-K, k = 0.0066 1/min @ 350 K
Ea = 40000 cal/mol, coolant temperature Ta = 300 K
UA = 8000 cal/min-K
3. Describe the behavior of conversions (X) abd equilibrium conversions (Xe)
aling the volume in a PFR with heat exchanger (the second row of Fig. 1).
T: temperature, Ta: coolant temperature, T0: feed temperature
4. The combination of ideal reactors are used to model real reactors.
Please draw a combination of PFRs and CSTRs (and/or a recycle system) to
describe the RTDs shown in Fig. 2.
5. The elementary steps of a reaction A + B ==> C + D are followings. Derive
the rate equations.
(a) The surface reaction is the rate limiting step.
(b) The desorption of C is rate limiting step.
A + S --> AS (adsorption)
B + AS + S --> CS + DS (irreversible surface reaction)
CS --> C + S (desorption)
DS --> D + S (desorption)
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Figure 1 : http://ppt.cc/KW60
Figure 2 : http://ppt.cc/~Cdt
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Design equations:
CSTR : V = FA0 (Xout - Xin ) / (-rA)out
PFR : FA0 dX/dV = -rA
G(T) = (-ΔHrx) (-rA*V/FA0) = (-ΔHrx)(X)
Tc = (T0*FA0*Cp0 + U*A*Ta)/ (UA + Cp0*FA0) = (kTa+T0)/(k+1)
Gas constant : R = 8314 Pa-L/mol-K = 1.987 cal/mol
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長恨此身非我有，何時忘卻營營？夜闌風靜縠紋平，小舟從此逝，江海寄餘生。
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◆ From: 140.112.24.135
※ 編輯: cxzdsa 來自: 140.112.24.135 (06/25 01:21)