Solution Plots Dissolution - SPL-ethz/CAT GitHub Wiki

Process Variables

In the plot process variables, the graphs show the temperature and total solvent and antisolvent mass profile, respectively.

The temperature graph can be separated into three regions:

Region I: strong linear decrease of temperature Region II: constant temperature Region III: low linear decrease of temperature

The total mass stays constant throughout the process.

Concentration plot

First, the concentration increases due to a temperature drop in the subsaturated state. The maximum is reached when the state switches from undersaturated to supersaturated (solubility curve, S=1). Afterwards, the concentration decreases again.

Supersaturation plot

Region I: monotonous increase due to temperature drop Region II: constant when neither temperature nor total mass changes Region III: increase to 1 and afterwards balance according to the following relation

where all time the decrease in the denominator prevails over the decrease in the nominator.

Operating system plot

In this plot the concentration is shown dependent on the temperature. Basically, the information from the concentration and supersaturation plot are respresented in one plot. The three regions mentioned above can be recognized again. Note that it can nicely be seen that our process starts in the subsaturated domain.

PSD cumulative properties

In this plot, the 0-th and 3-rd moment of the distribution and the volume average length are plotted. The moments are defined as

and the volume average length is defined as

.

PSDs 3D (time evolution)