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[atiq124]

20 m3 of liquid (assume 20% caustic soda) in the reactor is heated at 90 degree C for an hour and Nitrogen purge continues during this period at rate of 20 m3/h. How do I calculated the water loss (weight/volume) under given conditions for 1 hours operation.

Schematic diagram is attached. 

 

Thanks

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•  Water Loss.jpg   15.99KB   3 downloads

Edited by atiq124, 12 March 2015 - 08:46 AM.

[thorium90]

Hi,

 

My first post in a long time.

Use the correlation in the table i provided to get mass transfer coefficient, k. Diffusivity, D is related to solubility which you can calculate using Henry constant.

 

Then use Ficks 2nd law. This is a PDE, you can use any numerical solver to solve for the concentration wrt time. With this profile you can then calculate the amount of mass that was removed in the time you desired.

Attached Files

•  mass txfr coeff.jpg   200.52KB   2 downloads

Edited by thorium90, 13 March 2015 - 01:18 PM.