irreversible series reactions(first order irreversible ...web.nuu.edu.tw/~chuang/maple/cre/1-1-1...
Post on 15-Sep-2019
11 Views
Preview:
TRANSCRIPT
> >
(4)(4)
(2)(2)
> >
> >
> >
(1)(1)
> >
(5)(5)
> >
> >
> >
(3)(3)
(7)(7)
> >
(6)(6)
> >
Irreversible Series Reactions(First Order Irreversible Series Reactions)Consider the first order series reactions
A Bwhere ka and kbare rate constants and the initial conditions are CA(0) = 1 mol/l, CB(0) = 0, and CC(0) = 0. The concentration of species C (CC(t)) at any time is given by the material balance:CC(t) =1 mol/l - CA(t) - CB(t)
> >
> >
(14)(14)
> >
(15)(15)
> >
(9)(9)
(11)(11)
(13)(13)
> >
> >
(10)(10)
(12)(12)
(8)(8)
(7)(7)
> >
> >
> >
> >
> >
> >
(7)(7)
> >
> >
> >
(23)(23)
> >
> >
(22)(22)
> >
(16)(16)
> >
(18)(18)
> >
> >
> >
> >
(21)(21)
> >
(19)(19)
> >
(20)(20)
(7)(7)
(17)(17)
> >
In special case ka=kb
> >
> >
> >
> >
> >
(7)(7)
> >
(24)(24)
Maximum Intermediate Concentration
> >
(27)(27)
> >
(26)(26)
> >
(28)(28)
> >
> >
> >
(7)(7)
(25)(25)
e
1
(5)(5)
> >
(3)(3)
(2)(2)
> > (4)(4)
> >
> >
> >
> >
> >
> >
(1)(1)
Consider the series-parallel reaction scheme in a batch reactor
Assuming that all the reactions are first order, write down the governing equations for this reaction. Assuming 1, 0, and 0 mol/cm3 as the initial conditions for A, B, and C develop analytical expressions for the concentration of A, B and C. Do you observe a maximum for B? Plot the concentration profiles for the parameters k1 = 2 min-1; k2 = 1 min-1; and k3 = 2 min-1.
(9)(9)
(8)(8)
(7)(7)
> >
> >
> >
> >
(6)(6)
> >
(13)(13)
> >
(9)(9)
(14)(14)
> >
> >
> >
(6)(6)
(16)(16)
(15)(15)
> >
(10)(10)
> >
> >
(12)(12)
> >
(11)(11)
> >
> >
(9)(9)
> >
> >
> >
> >
> >
> >
(17)(17)
(6)(6)
> >
(9)(9)
> >
> >
> >
(6)(6)
(18)(18)
> >
(19)(19)
> >
(1)(1)
> >
> >
> >
> >
> > (4)(4)
(2)(2)
(5)(5)
> >
> >
> >
(3)(3)
(6)(6)
> >
Parallel reaction
a b
a c
(8)(8)
> >
> >
(7)(7)
> >
(10)(10)
(9)(9)
(6)(6)
> >
(13)(13)
(15)(15)
> >
> >
> >
(11)(11)
> >
(16)(16)
> >
(6)(6)
> >
(14)(14)
(12)(12)
If the initial concentration of Ca is 1,Then
(17)(17)
> >
(21)(21)
> >
> >
(18)(18)
> >
> >
(11)(11)
> >
(20)(20)
(19)(19)
> >
> >
> >
(6)(6)
> >
> >
> >
(17)(17)
> >
> >
(6)(6)
(11)(11)
top related