The following feed to a distillation column is separated into an
overhead product that contains nothing boiling higher than isobutene and
bottoms that contain nothing boiling lower than propane.
Feed Component Mole %
Ethylene 1.9
Ethane 2.1
Propylene 5.2
Propane 14.8
Isobutane 25.0
n-Butane 34.0
n-Pentane 17.0
100.0
The concentration of isobutene in the overhead product is 4.8 mole %,
and the concentration of propane in the bottoms is 0.7 mole %.
Calculate the moles of the various components in the overhead and
bottoms per 100 moles of feed.
Solution.
Overhead,
concentration of Isobutane, 4.8 mol %
Ethylene 1.9, mol %
Ethane, 2.1 mol %
Propylene, 5.2 mol %
Isobutane, 25.0 mol %
Propane, 14.8 mol %
Isobutane, 25.0 mol %
n-butane, 34.0 mol %
n-Pentane, 17.0 mol %
Bottoms,
concentration of Propane, 0.7 mol %
Mathematics Homework Solutions
#15278
Mass Balance Problem
See attached for full problem.
The concentration of isobutene in the overhead product is 4.8 mole %, and the concentration of propane in the bottoms is 0.7 mole %. Calculate the moles of the various components in the overhead and bottoms per 100 moles of feed.
This problem shows how to calculate moles in various parts of a distillation process.
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