5. Separation Processes

Distillation — Quiz

Test your understanding of distillation with 5 practice questions.

Practice Questions

Question 1

In a distillation column, what is the impact of increasing the reflux ratio ($R$) on the reboiler duty, assuming constant distillate flow rate and composition?

Question 2

Consider a binary distillation column operating with a feed that is a subcooled liquid. If the feed temperature is further decreased, how would this affect the slope of the q-line on a McCabe-Thiele diagram?

Question 3

A distillation column is separating a binary mixture with a relative volatility ($\alpha$) of 1.2. If the desired distillate purity is 98 mol% of the more volatile component and the bottoms purity is 2 mol% of the more volatile component, which of the following statements is true regarding the number of theoretical stages required?

Question 4

In the context of distillation column design, what is the primary implication of operating a column at total reflux?

Question 5

When using the McCabe-Thiele method for a binary distillation, if the feed is a saturated vapor, what is the value of $q$?