(Adapted from a problem by John Falkner, University of Colorado.)
P6-64 Consider the following system of gas-phase reactions:
A X
Xrx=kc2 kq=0.004(mol/dm) min
A B rB=K₂ CA kz=0.3 min-1
A
Y ry=kącą kz=0.25 dm3/mol-min
Il
B
B is the desired product, and X and Y are foul pollutants that are expensive to
get rid of. The specific reaction rates are at 27°C. The reaction system is to be
operated at 27°C and 4 atm. Pure A enters the system at a volumetric flow rate
of 10 dm3/min.
(a) Sketch the instantaneous selectivities (SB/x, SBy, and SB/xy=ry/(rx+ry))
as a function of the concentration of CA:
(b) Consider a series of reactors. What should be the volume of the first reactor?
(c) What are the effluent concentrations of A, B, X, and Y from the first reactor.
Answers
Answer:
Adapted from a problem by John Falkner, University of Colorado.)
P6-64 Consider the following system of gas-phase reactions:
A X
Xrx=kc2 kq=0.004(mol/dm) min
A B rB=K₂ CA kz=0.3 min-1
A
Y ry=kącą kz=0.25 dm3/mol-min
Il
B
B is the desired product, and X and Y are foul pollutants that are expensive to
get rid of. The specific reaction rates are at 27°C. The reaction system is to be
operated at 27°C and 4 atm. Pure A enters the system at a volumetric flow rate
of 10 dm3/min.
(a) Sketch the instantaneous selectivities (SB/x, SBy, and SB/xy=ry/(rx+ry))
as a function of the concentration of CA:
(b) Consider a series of reactors. What should be the volume of the first reactor?
(c) What are the effluent concentrations of A, B, X, and Y from the first reactor.
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