A2 Dynamic Process Model Development

The following assumptions can be made for the dynamic model of the extraction process. 

the distribution coefficient a depends only on the temperature and is independent of the concentration, according the relationship  

water and benzene are ideal mixed in the extraction vessel 

the steam enters at boiling point, hence the cooling down of the steam to the condensation point can be ignored 

control of the contents of the extraction vessel is based on a pressure difference measurement manipulating the outflow of the extraction vessel, it can therefore be assumed that at ideal control, the total mass is constant. 

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