Provides an explicit warning that a continuous column’s feed point is system-specific.
The ternary analysis generalizes the binary feed and cost logic.
The economic optimum lies between the limiting-flow region, where equipment requirements diverge, and high internal flows, where energy costs rise. Feed location depends on whether the feed is liquid, vapor, or two phase, on the matching of rectifying and stripping concentration profiles, and on the mass-transfer model used.
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4.2.5.3–4.2.5.4, Optimal flow ratio and feed location
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