Mixing capacity index

Index of Mixing Capacity Index of Mixing State... 

Ogawa, K. (1981). Definition of local and whole mixing capacity indexes of equipment. Kagaku Kogaku Ronbunshu, 1, 207-210. 

The mixing capacity for the case where only the inflow from a specific o-region to each region occurs is a modified index that is obtained by setting 1 = 0 and then multiplied by VT/V0 in Eq. (2.30). The expression of the modified index becomes identical to the definition of the mixedness in the case of the transient response method in the previous section. This is only the contact point with the mixedness based on the transient response method. The CPD can be calculated if the transient probability of the inner substance is known. 

In industrial reactors, the full equilibration of the chain length distribution is prevented by incomplete mixing, as well as by the residence time distribution, thus resulting in considerable deviations from the equilibrium polydispersity index. These deviations are generally higher for continuous plants than for batch plants and increase with increasing plant capacity as demonstrated in Figure 2.2. 

Figure 3.6 illustrates the variation of (a) the specific retention volume (Vff which is proportional to the capacity factor) with the composition of a mixed stationary phase, and (b) the variation of the retention index for benzene with the composition. It is clear from these figures that, whereas straight lines are observed for the variation of the capacity factor with the composition, the retention index varies in a highly non-linear manner. 

Because of the rapidly growing number of reactions which can be carried out in supercritical fluids, there is an increasing demand for in situ techniques to monitor the course of chemical syntheses in these reaction media. There is a growing need to have efficient analytical techniques in order to determine chemical properties (like concentration and chemical species), physicochemical parameters (Uke heat capacities, conductivity, density, refractive index, and solu-bihty), thermodynamical information (like phase behavior and boundaries, partitioning, and critical points) and/or engineering information (like transfer phenomena, mixing, and scale-up). 

Fig. 2. Pattern selection on a hemisphere (approximating the growing tip of a plant). Surface spherical harmonics for index Z=3 (A) m = 2 (B) m=0 (C) equal mix of (A) and (B) produces a dichotomous branch pattern. Linear analysis predicts (A) and (B) patterns would grow equally, therefore always producing (C). Plant development shows both (B) and (C) patterns. Simulation and nonlinear analysis show that the full RD dynamics (Brusselator model) do have the capacity to produce both (B) and (C) patterns. From Holloway Harrison (2008), with permission.

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