Distillation trajectories under infinite reflux

Analogy Between Residue Curves and Distillation Trajectories Under Infinite Reflux... 

The distillation trajectory under infinite reflux is a line of conjugated liquid-vapor tie-lines, each of which corresponds to one of the column plates, in accordance with Eq. (3.2). In the works (Zharov, 1968 Zharov Serafimov, 1975), the broken line of conjugate hquid-vapor tie-lines is replaced with a continuous c-line, for which the liquid-vapor tie-hues are chords (Fig. 3.1a). At the same time it follows from Eq. (3.1) that the hquid-vapor tie-line is a tangent to the residue curve. Therefore, hquid-vapor tie-line, on the one hand, is a tangent to residue curve and, on the other hand, is a chord of the c-line. This fact determines the similarity and the difference between the residue curves and the c-lines (see Fig. 3.1b). In Fig. 3.1c, it is shown that the distillation trajectory under the infinite reflux (c-hne) crosses the set of residue curves. 

Figure 3.2. P roduct points and distillation trajectories under infinite refiux for different number of trays (a) semisharp split, (b) sharp direct split, and (c) split with distributed component. Ideal mixture K > Ki> K/),xd( ),xd(1),xd(3), xb(i), xb(2),(3). product points for different number of trays, xp = const, D/F= const short segments with arrows, conjugated tie-lines hquid-vapor (distillation trajectories under infinite reflux) thick solid lines, lines product composition for different number of trays.

The distillation process under infinite reflux is described by Eqs. (2.3) and (2.6) and is illustrated in the composition space by the trajectory being the interconnected tie-lines (the end of one tie-line serves as a beginning of another tie-line when moving upward from the column bottom). 

Trajectory Bundles Under Infinite Reflux Distillation Diagrams... 

The investigation of regularities of distillation trajectories location in infinite columns under infinite reflux is directed to the solution of the task of determination of possible splits. 

Taking into consideration the aforesaid, sections of Chapter 1 referring to residue curves bundles, to the structural elements of these bundles, and to the matrix description of the concentration space structure are completely valid regarding distillation trajectories under the infinite reflux. 

Obviously, at a flnite number of stages, the distillation trajectory under the infinite reflux should he in one of the c-lines and cannot pass through a stationary point of the concentration simplex, start or end in it. At the infinite number of... 

Trajectories of Distillation in Infinite Columns Under Infinite Reflux Table 3.1. Composition of wood pyrolysis product... 

What is the arrangement of the distillation trajectory bundles under infinite and finite reflux modes dependent on ... 

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