Continuous Plug Flow Reactors CPFR

Reactors systems that have plug flow characteristics (that is, iV 5 or Bo 7, see Sect. 3.3) differ from CSTR types in that in the former case there is a narrow residence time distribution. The whole mathematical theory of continuous cultivation discussed so far has concerned the well-mixed stirred tank reactor. 

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Fig. 11.9 Types of linear continuous-flow reactors (LCFRs). (a) Continuous plug flow reactor (CPFR) resembling a batch reactor (BR) with the axial distance z being equivalent to time spent in a BR. (b) A tabular flow reactor (TFR) with (tq) miscible thin disk of reactive component deformed and distributed (somewhat) by the shear field over the volume, and (b2) immiscible thin disk is deformed and stretched and broken up into droplets in a region of sufficiently high shear stresses, (c) SSE reactor with (cj) showing laminar distributive mixing of a miscible reactive component initially placed at z = 0 as a thin slab, stretched into a flat coiled strip at z L, and (c2) showing dispersive mixing of an immiscible reactive component initially placed at z — 0 as a thin slab, stretched and broken up into droplets at z — L.

Oeff.L [m s ] in case of continuous plug flow reactor (CPFR)... 

The ideal continuous plug flow reactor (CPFR) has no profile at any point of the tube in the steady state. The process, however, advances along the tube, and so shows a longitudinal concentration variation. The profile of a CPFR in space is identical to the profile of a DCSTR in time in case of a constant volume process this fact is of great importance for process design ( kinetic similarity ). 

Model 4 The Ideal Continuous Plug Flow Reactor (CPFR) or Tubular Reactor... 

Figure 6.57. Summary diagram of work flow in the systematic development of a bioprocess of the presented integrating strategy. The diagram is based on the interaction between kinetics (Chap. 5) and transport (Chap. 3) processes, which are clarified during a kinetic analysis (Chap. 4). As a special situation, the design and utilization of new types of reactors are shown (discontinuous stirred vessel, DCSTR bubble column, BC semicontinuous stirred vessel, SCSTR recycle reactor, RR continuous stirred vessel, CSTR continuous cascade, NCSTR tower reactor, TR continuous plug flow reactor, CPFR fixed and fluidized bed reactor, FBR).

Styrene polymerizes spontaneously on heating by a free-radical mechanism. Some commercial polystyrene is produced by suspension and emulsion polymerization, but the principal route is solution polymerization. This is carried out either in a continuous plug-flow reactor (CPFR) or a continuous stirred tank reactor (CSTR). 

Figure 3.30. Basic reactor concept and concentration-versus>time and concentration-versus-space profiles. DCSTR, discontinuous stirred tank reactor SCSTR, semicon-tinuous stirred tank reactor CSTR, continuous stirred tank reactor CPFR, continuous plug flow reactor NCSTR, a cascade of N stirred vessels.

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