Solution Plots Dissolution
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.
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.
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.
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.
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
