permeate vapor collection 1

[ridge2481]

Dear All:

I am working on a bench scale pervaporation unit, directed towards separating water from ethanol using a polymer dehydration membrane.

As of now, I am having extreme difficulty in collecting all the permeate vapors and condensing it. Although my experimental time is long enough (18hrs or more) I am able to condense only several drops of vapors ( from feed flow rate of 6ml/min -retenate recovery approximately around 95%)(I am using a glass vacuum trap and liquid N2 to condense)

Any advice or tips on improving the collection of permeate vapors will be very helpful.

Thanks in advance
RW

 

[Torricelli]

your vacuum is probably higher than required, you should better condense at the discharge of the vacuum pump.

 

[Niq]

You may try with bigger dia Vacuum Condenser (more heat transfer area). And may be one more Condenser in line, preferably after or before Vacuum Pump, could help.