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I would like to add a packed section to my column (with copper mesh) order to increase the contact time of my distillate with the copper.
I am thinking of putting in a straight pipe section above my 7 bubble cap trays filled with the copper mesh.
Is it necessary to have a sight glass in the packed section? I am of the opinion that I will see any flooding or foaming from my trays below the packed section and do not require sight glass.
I would appreciate any advice.