A distillation tower with sieve trays is to separate benzene from mono-chlorobenzene. Conditions at a plate near the bottom of the column are:

Vapor Phase 

Mass flow rate \(=24,850 \mathrm{lb} / \mathrm{hr}\)

Density \(=0.356 \mathrm{lb} / \mathrm{ft}^{3}\)

Liquid Phase 

Mass flow rate \(=41,850 \mathrm{lb} / \mathrm{hr}\)

Density \(=59.9 \mathrm{lb} / \mathrm{ft}^{3}\)

Surface tension \(=24\) dyne \(/ \mathrm{cm}\)

Determine a reasonable tower diameter.