Ternary Batch Distillation With Holdup

The model of a multicomponent batch distillation column was derived in Sec. 3.13. For a simulation example, let us consider a ternary mixture. Three products will be produced and two slop cuts may also be produced. Constant relative volatility, equimolal overflow, constant tray holdup, and ideal trays are assumed. [Pg.157]

The column starts up on total reflux (no distillate is withdrawn) until the distillate composition reaches the desired purity level. The time at total reflux is called TE in the program. Then distillate is withdrawn at a fixed rate of 40 mol/h. [Pg.157]

Tenury batch dntilLition with slop cute [Pg.158]

AFTER TOTAL REFLUX STARTUP, DISTILLATE FLOW RATE IS FIXED ASSUMPTIONS CONSTANT RELATIVE VOLATILITIES (TERNARY) BQUIMOLAL OVERFLOW, IDEAL TRAYS [Pg.158]

C TOTAL REFLUX UNTIL XD(1) REACHES XDISP D=DFIX [Pg.158]

Seader and Henley (1998) considered the separation of a ternary mixture in a batch distillation column with B0 = 100 moles, xB0 = = <0.33, 0.33, 0.34> molefraction, relative volatility a= <2.0, 1.5, 1.0>, theoretical plates N = 3, reflux ratio R = 10 and vapour boilup ratio V = 110 kmol/hr. The column operation was simulated using the short-cut model of Sundaram and Evans (1993a). The results in terms of reboiler holdup (Bj), reboiler composition profile (xBI), accumulated distillate composition profile (xa), minimum number of plates (Nmin) and minimum... [Pg.62]

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