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Calculate Packed Height In A Laboratory Distillation System

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#1 HOnKung


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Posted 25 April 2023 - 04:17 PM

Let's say I have a glassware distillation system, the column is a long tube, so i can fill in with glass Raschig rings.

My question is, how can I choose the right heigh of packed in the column?

Thanks for the help and sorry for my bad writing english.



#2 breizh


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Posted 25 April 2023 - 08:21 PM


Should be trials and errors method? 


I've attached a paper (link) for general method.

I will start with HETP =Column diameter.  (See paper)



Good luck


#3 Pilesar


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Posted 26 April 2023 - 05:38 AM

What is the goal? For maximum performance, more packing is better as long as the column has good vapor and liquid distribution.  Liquid tends to stay near the column wall so packed columns often have several beds with redistributors between them. If the column is narrow and short like most lab tubes, then you can put as much packing in that will fit. You should leave enough unpacked volume at the top and bottom so the liquid and vapor phases can separate from each other.

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