Present your findings by writing a comprehensive report summarizing your results with detailed explanation. The report should also contain a discussion of your methodology for addressing the problem.
Assignment
Consider the following gas phase reaction involving volume change in a PFR reactor. The reactor consists of 950 tubes of diameter 1.2 inch.
The cylindrical reactor is provided with a heat exchanger on the outside of the reactor of diameter 1.2 inch.
A(g) B(g) + C(g)
Plot T(oC), XA, Ta, and (-rA) (extent of conversion) versus the volume of reactor (m3) for the following four following scenarios:
1.Adiabatic operation
2.The outside of the reactor is maintained at a constant temperature, Ta of 875oC.
3.The reactor is provided on the outside with a heat exchanger. The overall heat transfer coefficient U is estimated to be 120 W/m2- oC. The cooling fluid (air of flow rate 0.11 mole/s) flows in a co-current manner with an inlet temperature of 1250 K. Assume the heat capacity, Cp of 1005 J/Kg-0C
- Same as 3 above except the flow is counter-current
DATA
a.(-rA) = kCA
b.K =koexp(-E/RT) where ko = 8*10^14 1/s and E = 282,000 J/mole
c.Mass flow rate of A = 2.15 kg/s
d.Inlet temperature of reactant = 750 oC
e.Inlet pressure of reactant = 1.5 atm
f.The entering fluid contains neither product B or C
Sample Solution