Examples Illustrating Use of Multi-mode Catalytic Reactor Models

Examples Illustrating Use of Multi-mode Catalytic Reactor Models 

We apply the low-dimensional convection model [Eq. (288)] to the simple case of a isothermal bimolecular wall-catalyzed reaction occurring in a tubular reactor. For the reaction 

In this example, we examine the effects of mixing and mass transfer limitations on the yields of competitive-consecutive reactions of the type 

The multi-mode model for the above reaction scheme in an isothermal tank reactor is given by 

The catalytic reaction is simply a bimolecular reaction between B and R, with boundary conditions given by ce,m lz=0+ = cxBm, cj m z=0+ = c] m. The yield of S increases monotonically as the Damkohler number of the catalytic reaction, Das, increases, and finally attains an asymptotic value when the catalytic reaction reaches its mass transfer limited asymptote. This feature is illustrated in Fig. 19, where the variation of Ys with Das is shown. It is interesting to note from Fig. 19, that the value of the mass transfer limited asymptote depends on the micromixing limitation of the homogeneous reaction. Larger is the micromixing limitation (rj) of the homogeneous reaction, more is the local 

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