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what are processes other than vacuum degassing and distillation columns where there would be a control...

what are processes other than vacuum degassing and distillation columns where there would be a control on pressure and level?

note: i mean a MIMO system and there would exist interaction between the level and pressure and need to be control.
Engineering   Chemical-Engineering   
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Answer #1

Froth floatation is one such process, in this process you bubble pressurized gas through a liquid pool, it will form gas bubbles which are terahydral in shape, these bubbles have preference for solute present in liquid, so it adsorbs it on the surface, along with this, it forms a thin film of liquid on gas liquid interface and hence the solute gets concentrated since it carries less solvent and very high solute, these bubbles are collected in seperate container and solute is obtained. Here input, pressure of gas (determine the size of bubbles) and flow rate ( determine residence time in liquid pool) and output is liquid flow rate, and solute concentration/ selectivity.

Adsorption: The pressure of inlet gas determines the amount of gas asorbed and the quality of output gas.

Input: pressure and gas flow rate

Output:Gas flow rate and quality

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