This simulation is the distillation of a batch of feed containing components A and B. A is the more volatile component and will accumulate in the overhead product (distillate). What remains in the still base will become weaker in A and thus richer in B. The aim is to maximise the amount of overhead product but to earn money you must meet the specification of 0.9 (90%) for A. You can use the up/down arrows to add feed or change steam flow.
Low steam rates mean you won’t make that much product during the run. High steam rates can cause the tray column to work inefficiently as the trays become over-loaded as too much vapour and liquid flow through the column.
The simulation uses a term "alpha"; this indicates how easy it is to separate And B. You can choose the number of plates in the column; the more plates the better the separation.
You ended the game with a total of
This example simulates a batch reactor where a batch of feed is separated into a top product, containing the more volatile component(s) and a residue bottoms product containing the less volatile components(s). Other examples of distillation are continuous units where the raw material is fed continuously into the centre of the column and top products and bottom product are both removed continuously.
Distillation is used very widely in the chemical industry to separate and purify. Typical examples include oil refineries.
See Wikipedia or BBC Bitesize for a simple explanation.
Cooling Water Return