# 0023 and xd 0675 the number of minimum equilibrium

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: stages. Exercise 7.33 (continued) Analysis: ( c) (continued) Exercise 7.33 (continued) Analysis: ( c) (continued) Exercise 7.34 Subject: Stripping of isopropyl alcohol from water at 1 atm using either a partial reboiler or open (live) steam. Given: Bubble-point liquid feed containing 10 mol% alcohol. Vapor overhead to contain 40 mol% alcohol. Boilup, V/F = 0.246. Vapor-liquid equilibrium data from Exercise 7.33. Assumptions: Constant molar overflow. Find: Determine the number of equilibrium stages for: (1) Partial reboiler, (2) Open steam. Analysis: Take a basis of F = 100 kmol/h. Vapor rate leaving top of column = V = 0.246F = D = 0.246(100) = 24.6 kmol/h. Alcohol in overhead vapor = 0.4(24.6) = 9.84 kmol/h. Water in the overhead vapor = 24.6 - 9.84 = 14.76 kmol/h. With a partial reboiler, bottoms rate = B = F - D = 100 - 24.6 = 75.4 kmol/h. Alcohol in bottoms = 10 - 9.84 = 0.16 kmol/h. Mole fraction of alcohol in bottoms = xB = 0.16/75.4 = 0.0021. With isopropanol as the most volatile component, the McCabe-Thiele diagram is...
View Full Document

## This note was uploaded on 09/08/2008 for the course CHE 244 taught by Professor Selebi during the Spring '06 term at Lehigh University .

Ask a homework question - tutors are online