反应工程课件ppt

教材和讲义
1. 王安杰，周裕之，赵蓓. 化学反应工程学. 化学工业出版社
2. O. Levenspiel Chemical Reaction Engineering. John Wiley & Sons, Inc. 1999.
3. I. Chorkendorff, J.W. Niemantsverdriet. Concepts of Modern Catalysis and Kinetics. WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2003.
amount of all components at time t :
nt nt0 a b c d a nA0xA
(2.7)
nt nt0 1 A yA0 xA nt0 1 AxA
(2.8)
Expansion Factor： A a b c d a
a =2, b = 1, c = 2, B = 5/2 = 2.5, C = 1/2 = 0.5, I = 10/2 = 5
例2.1
2A + B → 2C 在一间歇反应器中进行 CA0 = 2 kmolm-3，CB0 = 5 kmolm-3，CC0 =1 kmolm-3， CI0 = 10 kmolm-3。其中I为溶剂，不参与反应。 假定反应液的密度不变，试求xA = 80 %时各组分的浓度 和摩尔分率。
a =2, b = 1, c = 2, B = 5/2 = 2.5, C = 1/2 = 0.5, I = 10/2 = 5
xA FA0 FA FA0
xAf FA0 FAf FA0
(2.11) (2.12)
2 . 1. 2 Molar Fraction
Batch Reactor： Steady-State Flow Reactor：
yA nA / nt yA FA / Ft
(2.13) (2.14)
conversion of A in constant volume system is given by
xA nA0 nA nA0
(2.1)
nA nA0 1 xA
(2.2)
nB nA0 B b / axA
B nB0 / nA0
(2.3)
nC nA0 C c / axA
(2.9)
yA0 nA0 / nt0
Expansion Ratio： A A yA0
(2.10)
2 . 1. 1 Conversion
The Steady-State Flow Reactor
Since the composition in steady-state reactor is uniform throughout, the conversion is given by：
催化反应工程
Catalytic Reaction Engineering
李翔 西部校区化工实验楼B325 Xiang Li B-325, Chemical Engineering
Laboratory, Western Campus Tel： 84986124 E-mail: lixiang@
Reaction rate
2 . 1 Conversion and Molar Fraction
Conversion
In the Batch Reactor In the Steady-State Flow Reactor
Molar Fraction
2 . 1. 1 Conversion
C nC0 / nA0
axA
D nD0 / nA0
(2.5)
2 . 1. 1 Conversion
Suppose that I is an inert, then ：
nI nI 0 nA0I
(2.6)
nt0 is the initial amount of A in the reactor at time zero, nt is the
A b aB c aC d aD
1. In the Batch Reactor
Suppose that nA0 is the initial amount of A in the reactor at
time t=0, and that nA is the amount of A at time t . Then the
yD

yA0[ D (d / a)xA ] 1 A xA
yI
yA0 I 1 A xA
(2.15) (2.16) (2.17) (2.18) (2.19)
例2.1
2A + B → 2C 在一间歇反应器中进行 CA0 = 2 kmolm-3，CB0 = 5 kmolm-3，CC0 =1 kmolm-3， CI0 = 10 kmolm-3。其中I为溶剂，不参与反应。 假定反应液的密度不变，试求xA = 80 %时各组分的浓度 和摩尔分率。
The expressions of molar fraction for he two systems are same
yA

yA0 (1 xA )
1 A xA
yB

yA0[ B (b / a) xA ] 1 A xA
yC

yA0[C (c / a) xA ] 1 A xA
2. Chemical Reaction Kinetics
2.1 Conversion and Molar Fraction 2.2 Rate equation 2.3 The reaction order 2.4 Temperature Dependence of Reaction Rate 2.5 Kinetic theory 2.6 Autocatalytic Reactions