Scaleup when nonisothermal

Table 3.1 suggests that scaling in series could make sense for an adiabatic, gas-phase reaction with no change in the number of moles upon reaction. It would also make sense when the number of moles decreases upon reaction, since the high pressures caused by this form of scaleup will favor the forward reaction. Chapter 5 gives the design equations for nonisothermal reactions and discusses the thermal aspects of scaleup. 

Previous chapters have discussed how isothermal or adiabatic reactors can be scaled up. Nonisothermal reactors are more difficult. They can be scaled by maintaining the same tube diameter or by the modeling approach. The challenge is to increase tube diameter upon scaleup. This is rarely possible and when it is possible, scaleup must be based on the modeling approach. If the predictions are satisfactory, and if you have confidence in the model, proceed with scaleup. 

We begin a discussion of scaleup relationships and strategies for tubular reactors. Results are restricted to tubes with a constant cross-sectional area. Chapter 3 discusses only isothermal or adiabatic reactors, but the relationships in Tables 3.1-3.3 include scaleup factors for the nonisothermal reactors that are discussed in Chapter 5. These results assume constant density, but Tables 3.4 and 3.5 give some specialized results for ideal gases when the pressure drop down the tube is significant. 

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See also in sourсe #XX -- [ ]

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