12 26 6th edition has a saturation pressure of 35

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

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 6th edition) has a saturation pressure of 35 psia at 0oF. Exercise 7.5 Subject: Need for testing or piloting a distillation separation. Find: Circumstances that require laboratory or pilot-plant testing of a proposed distillation. Analysis: Laboratory and/or pilot-plant testing is recommended for: 1. A new mixture not previously separated by distillation. 2. A sharp and critical separation. 3. A mixture with uncertain vapor-liquid equilibria data. 4. A lack of experience with tray efficiency for the mixture. Exercise 7.6 Subject: Economic tradeoff in distillation. Find: Reasons for tradeoff between trays and reflux. Analysis: It is well known that for a given separation, as the number of trays is increased, the reflux ratio can be decreased. Thus, as the tower height is increased, the vapor and liquid traffic up and down the column can be decreased. Therefore, the column diameter can be decreased. Also the condenser and reboiler duties and sizes, and the utility requirements can be decreased. Therefore,...
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