For the distillation column in Problems 21.21, 21.22, and 21.23, someone suggests that the column pressure can be increased by increasing the feed pressure. What is your response? Explain the rationale for your response.

Problem 21.23

For the distillation column in Problems 21.21 and 21.22, how can the pressure in the column be changed?

Problem 21.22

For the distillation column in Problem 21.21, it is suggested to change the pressure of the column. Explain why this might work.

Problem 21.21

An existing distillation column is to be scaled up (increase throughput) without changing the distillate and bottom compositions. What happens to the reflux ratio? What problems might arise in the performance of this column?