Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Temperature profiles multicomponent distillation

Figure 2.17 Temperature profile in multicomponent distillation, Example 2,4. (From C. d.. King, Separation Processes, 2d ed, Copyright by McGraw-Hill, Inc. Reprinted by permission.)... Figure 2.17 Temperature profile in multicomponent distillation, Example 2,4. (From C. d.. King, Separation Processes, 2d ed, Copyright by McGraw-Hill, Inc. Reprinted by permission.)...
In multicomponent separations, the sensitivity of temperature to the key components is important. Figure 18.2a and b shows composition and temperature profiles for a depropanizer separating propane (C3) and lighter components from butane (C4) and heavier components. The temperature is sensitive to the composition of the keys between tray 3 and tray 13. Below tray 3 and above tray 13 the temperature is more sensitive to the concentration of nonkeys than to the concentration of the keys. Trays 8 to 10 show some tendency toward retrograde distillation (recognized by the maximum in the C4 concentration curve) and are best avoided. Moczek et al. (287) provide a detailed demonstration of the anomaly in temperature response in the retrograde distillation region. This leaves trays 3 to 7 and trays 11 to 13 as those suitable for temperatime control. [Pg.547]

Explain the flow, temperature, and composition profiles for multicomponent distillation... [Pg.236]

Many industrial columns use temperatures for composition control because direct composition analyzers can be expensive and unreliable. Although temperature is uniquely related to composition only in a binary system (at known pressure), it is still often possible to use the temperatures on various trays up and down the column to maintain approximate composition control, even in multicomponent systems. Probably 75 percent of all distillation columns use temperature control of some tray to hold the composition profile in the column. This prevents the light-key (LK) impurities from dropping out the bottom and the heavy-key (HK) impurities from going overhead. [Pg.205]


See other pages where Temperature profiles multicomponent distillation is mentioned: [Pg.65]    [Pg.695]    [Pg.588]    [Pg.394]    [Pg.50]    [Pg.286]   
See also in sourсe #XX -- [ Pg.63 ]

See also in sourсe #XX -- [ Pg.63 ]




SEARCH



Distillate temperature

Distillation temperature

Distillation temperature profile

Multicomponent distillation

Multicomponent distillation profiles

© 2024 chempedia.info