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Calculate volume of cascade consisting of two ideal tank reactors required for the production of 5 0 Megagram / day ethyl acetate. The reaction is

Calculate volume of cascade consisting of two ideal tank reactors required for the production of 50 Megagram/day ethyl acetate. The reaction is described by the equation:
C2H5OH+CH3COO H=CH3COO C2H5+H2O
A+B=C+D
Reaction rate in the liquid phase is defined by the expression:
r=k(cAcB-cCcDKC)
Reaction rate constant equals k=7.93*10-6[m3kmol*s] and the equilibrium constant equals KC=2.93. The raw material is as follows (% mass): uA0=46%,uB0=23%,uD0=31%. The reaction should be carried out to B=0.35. Density of the mixture equals
1020kgm3. Volumes of both reactors are the same.(Tips:Try to obtain a formula for space time and conversion (which you use for each reactor) from the balance of reactant B: FB0-FB1+rB1*V=0 for the first reactor and FB1-FB2+rB2*V=0 for the second reactor.)
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