Competitive Reaction Sequence

Equation 6.3 gives the rate constants, and both reactions are endothermic per Equation 

Determine optimal reactor volumes and operating temperatures for the three ideal reactors a single CSTR, an isothermal PFR, and an adiabatic PFR. 

SOLUTION The computer programs used for the consecutive reaction examples can be 

All other things being equal, as they are in this contrived example, the competitive reaction sequence of Equation 6.6 is superior for the manufacture of B than the consecutive sequence of Equation 6.1. The CSTR remains a doubtful choice, but the isothermal PER is now better than the adiabatic PER. This is because the optimal temperature profile is increasing rather decreasing. See Table 6.6 for comparisons. 

Eind the optimal temperature profile T t) that maximizes the concentration of component B in the consecutive reaction sequence of Equation 6.6 for a PER subject to the constraint that f= 0.8 h. 

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All the results obtained for isothermal, constant-density batch reactors apply to isothermal, constant-density (and constant cross-section) piston flow reactors. Just replace t with z/u, and evaluate the outlet concentration at z = L. Equivalently, leave the result in the time domain and evaluate the outlet composition t = L/u. For example, the solution for component B in the competitive reaction sequence of... 

The mean residence time for the optimized PFR reactors in Example 6.4 is about 0.8 h and boni is about 3.4 kg mol m . Find the optimal temperature profile T(z) that maximizes the concentration of component B in the competitive reaction sequence of Equation 6.1 for a PFR subject to the constraint that t = 0.8 h. Assume ajn = 4.5 kg mol m . ... 

Through a designed competition reaction sequence involving the reaction of an alkenylboron dichloride with an allyloxide in the presence of allyltrimethylsilane, the migration of the alkenyl moiety was shown to proceed via a cationic pathway (Scheme 23.71). ... 

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