Plug flow reactor comparison with CSTR

It is worthwhile to compare the conversion obtained in an isothermal plug-flow reactor (PFR) with that obtained in a CSTR for given reaction kinetics. Figure 8.12 shows a fair comparison for irreversible first-order kinetics by plotting the conversion in both reactors as a function of space-time Xq-... 

Size Comparisons Between Cascades of Ideal Continuous Stirred Tank Reactors and Plug Flow Reactors. In this section the size requirements for CSTR cascades containing different numbers of identical reactors are compared with that for a plug flow reactor used to effect the same change in composition. 

Comparison of performance of a series of N equal-size CSTR reactors with a plug flow reactor for the first-order reaction... 

The previous chapters have discussed the behaviour of non-linear chemical systems in the two most familiar experimental contexts the well-stirred closed vessel and the well-stirred continuous-flow reactor. Now we turn to a number of other situations. First we introduce the plug-flow reactor, which has strong analogies with the classic closed vessel and which will also lead on to our investigation of chemical wave propagation in chapter 11. Then we relax the stirring condition. This allows diffusive processes to become important and to interact with the chemistry. In this chapter, we examine one form of the reaction-diffusion cell, whose behaviour can be readily understood by comparison with the responses observed in the CSTR. 

Petroleum refinery flowsketch, 26 PER (plug flow reactor), 55,558 comparison with CSTR, complex reactions, 569 volume ratio to CSTR, 571 Phase diagrams nitrotoluene isomers, 544 salt solutions, 526 use of example, 528 Phenol bv the chlorbenzene process, 34 Phosgene synthesis, 594 PhthMic anhydride synthesis, 593 PID (proportional-integral-derivative) controllers, 41, 42... 

Fig. 14-2 Comparison of a continous stirred tank reactor (CSTR) with a plug flow reactor (PFR)...

Figure 8.15 Comparison of performance of a series of N equal-sized CSTR reactors with a plug flow reactor for elementary second-order reactions 2A -> products and A -I- B -> products with C o == Bo negligible expansion (5 = 0). For the same processing rate of identical feed, the ordinate measures the volume...

Figure 6.36. Plot of the dimensionless concentration of cell mass x and substrate s for a continuous culture as a function of the dimensionless mean residence time I as in Fig. 6.1b with Xq > 0 Calculated comparison between a CSTR with maximum mixing (ST m) or one with total segregation (ST J and a continuous plug flow reactor (PF), assuming Monod kinetics with a death rate (Tsai et al., 1969).

FIGURE 51.4 Time dependences of the logarithmic isotope fraction in the reaction product for different types of reaction mechanisms in a CSTR (B) and plug-flow reactor (C) in comparison with a differential reactor (A). 

Our treatment of Chemical Reaction Engineering begins in Chapters 1 and 2 and continues in Chapters 11-24. After an introduction (Chapter 11) surveying the field, the next five Chapters (12-16) are devoted to performance and design characteristics of four ideal reactor models (batch, CSTR, plug-flow, and laminar-flow), and to the characteristics of various types of ideal flow involved in continuous-flow reactors. Chapter 17 deals with comparisons and combinations of ideal reactors. Chapter 18 deals with ideal reactors for complex (multireaction) systems. Chapters 19 and 20 treat nonideal flow and reactor considerations taking this into account. Chapters 21-24 provide an introduction to reactors for multiphase systems, including fixed-bed catalytic reactors, fluidized-bed reactors, and reactors for gas-solid and gas-liquid reactions. 

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