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7) We're working with a cascade of three flash drums separating components A and B. The vapor and liquid streams from flash drum 1 are fed into drums 2 and 3, respectively. A is the more volatile component, and equilibrium data for A is given on the following pages. The feed to drum 1 is a 50 mol % mixture of A and B and has an overall flow rate of 100 kmol/h. Drum 1 operates such that 80% of the feed is vaporized while drum 2 operates such that 50% of its feed is vaporized. All process streams and known information are in the diagram below. What is the maximum vapor purity obtainable from flash unit 3? What is the value of (V/F)3 such that the composition x2 is twice the a) b) composition x3? c) Given the conditions in part b), compute the flow rates of all streams leaving flash drums 2 and 3.

7) We're working with a cascade of three flash drums separating components A and B. The vapor and liquid streams from flash drum 1 are fed into drums 2 and 3, respectively. A is the more volatile component, and equilibrium data for A is given on the following pages. The feed to drum 1 is a 50 mol % mixture of A and B and has an overall flow rate of 100 kmol/h. Drum 1 operates such that 80% of the feed is vaporized while drum 2 operates such that 50% of its feed is vaporized. All process streams and known information are in the diagram below. What is the maximum vapor purity obtainable from flash unit 3? What is the value of (V/F)3 such that the composition x2 is twice the a) b) composition x3? c) Given the conditions in part b), compute the flow rates of all streams leaving flash drums 2 and 3.

Introduction to Chemical Engineering Thermodynamics
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
Problem 1.1P
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vapor mol fraction, component A 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 0.1 0.2 0.4 0.5 0.6 0.7 liquid mol fraction, component A 0.3 0.8 0.9 1
Transcribed Image Text:vapor mol fraction, component A 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 0.1 0.2 0.4 0.5 0.6 0.7 liquid mol fraction, component A 0.3 0.8 0.9 1
7) We're working with a cascade of three flash drums separating components A and B. The vapor and liquid streams from flash drum 1 are fed into drums 2 and 3, respectively. A is the more volatile component, and equilibrium data for A is given on the following pages. The feed to drum 1 is 50 mol% mixture of A and B and has an overall flow rate of 100 kmol/h. Drum 1 operates such that 80% of the feed is vaporized while drum 2 operates such that 50% of its feed is vaporized. All process streams and known information are in the diagram below. What is the maximum vapor purity obtainable from flash unit 3? What is the value of (V/F)3 such that the composition x2 is twice the a) b) composition X3? c) Given the conditions in part b), compute the flow rates of all streams leaving flash drums 2 and 3. F = 100 kmol/h, z = 0.5 5.9 1 (V/F)₁ =0.8 V₁,Y1 L₁, X1 V2,Y2/ 2 (V/F)2 =0.5 3 (V/F)3 =? L2, X2 V3, Y3 L3, X3
Transcribed Image Text:7) We're working with a cascade of three flash drums separating components A and B. The vapor and liquid streams from flash drum 1 are fed into drums 2 and 3, respectively. A is the more volatile component, and equilibrium data for A is given on the following pages. The feed to drum 1 is 50 mol% mixture of A and B and has an overall flow rate of 100 kmol/h. Drum 1 operates such that 80% of the feed is vaporized while drum 2 operates such that 50% of its feed is vaporized. All process streams and known information are in the diagram below. What is the maximum vapor purity obtainable from flash unit 3? What is the value of (V/F)3 such that the composition x2 is twice the a) b) composition X3? c) Given the conditions in part b), compute the flow rates of all streams leaving flash drums 2 and 3. F = 100 kmol/h, z = 0.5 5.9 1 (V/F)₁ =0.8 V₁,Y1 L₁, X1 V2,Y2/ 2 (V/F)2 =0.5 3 (V/F)3 =? L2, X2 V3, Y3 L3, X3
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