3. Five hundred Ibmol of 48.8 mol% A and 51.2 mol% B with a relative volatility aa of 2.0 is separated in a batch rectifier consisting of a total condenser, a column with seven theoretical stages, and a still-pot. The reflux ratio is varied to maintain the distillate at 95 mol% A. The column operates with a vapor boilup rate of 213.5 lbmol/h. The rectification is stopped when the mole fraction of A in the still is 0.192. Determine the (a) rectification time and (b) total amount of distillate produced.
3. Five hundred Ibmol of 48.8 mol% A and 51.2 mol% B with a relative volatility aa of 2.0 is separated in a batch rectifier consisting of a total condenser, a column with seven theoretical stages, and a still-pot. The reflux ratio is varied to maintain the distillate at 95 mol% A. The column operates with a vapor boilup rate of 213.5 lbmol/h. The rectification is stopped when the mole fraction of A in the still is 0.192. Determine the (a) rectification time and (b) total amount of distillate produced.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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Transcribed Image Text:3. Five hundred Ibmol of 48.8 mol% A and 51.2 mol% B with a relative volatility a
of 2.0 is separated in a batch rectifier consisting of a total condenser, a column
with seven theoretical stages, and a still-pot. The reflux ratio is varied to maintain
the distillate at 95 mol% A. The column operates with a vapor boilup rate of
213.5 lbmol/h. The rectification is stopped when the mole fraction of A in the still
is 0.192. Determine the (a) rectification time and (b) total amount of distillate
produced.
Trapezoidal rule:
V f(x) dz = Az (f(z0) + 2f(x1)+2f(x2) +2f(x3) + 2f(x4) + · · · + 2f(xn-1) + f(zn)),
b- a
where Ax =
and x; = a + iAr.
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