Inside a Mass Exchange Column: Visualizing Vapor–Liquid Interaction in Distillation

Visualizing Vapor–Liquid Interaction in R&D Studies

In this R&D study, we built a transparent glass column to observe vapor liquid interaction in distillation process.

This setup allows us to see, in detail, the flow patterns and mass transfer that normally remain hidden inside industrial equipment.

What the video shows:

• A section of column filled with regular packing and a vapor redistributor cap just below it.

• Vapor generated from hexane boiling at the column base rises upward.

• The vapor passes through the redistributor cap and interacts with the liquid downflow coming from the packing above.

• Liquid is continuously fed from an irrigation device at the top of the column, ensuring uniform distribution.

Why it matters:

The study demonstrates how redistributor designs affect vapor–liquid interaction in distillation and, consequently, impact mass transfer efficiency. In particular, it highlights the limitations of a flat cap compared with more advanced designs.

Understanding these microscopic interactions helps us improve separation efficiency, column design, and process optimization in industrial chemical engineering.

This video is part of our broader work on improving the understanding and efficiency of separation processes. If you are interested in related research, take a look at our recent post on optimization of butadiene extractive distillation.