Unformatted text preview: Homework 6 Problem 6 Distillation Column Design Hand Calculations
60 points possible due Monday October 10, 2011 Grader: Alan Problem Statement: A sieve tray distillation column is to be used to separate a propane/propylene mixture. The multi‐component feed to the column is completely vapor at a temperature of 43.3oC and a composition shown in the table below. m , kg/s
m , kg/s
Component ‐6 Acetylene 1.3 X 10
MAPD* 5.4 X 10‐4 Ethylene 1.3 X 10‐6 1,3‐Butadiene 3.7 X 10‐4 Ethane 3.3 X 10‐4 i‐Butene 1.9 X 10‐4 Propylene 6.41 1‐Butene 1.2 X 10‐4 Propane 4.62 *MAPD refers to the C3 acetylenes (C3H4), methylacetylene and propadiene. It is desired to obtain a product with a propylene concentration of 99.6 mole percent. Use the distillate and bottoms concentrations and flow rates determined for problem 5 to solve this problem. Please write down all of these values at the beginning of the solution to this problem. Determine the minimum number of trays, the actual number of trays, the optimum feed location, the minimum reflux ratio, the reflux ratio, and the column diameter. ...
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