NMP Condensing Temperature Calculation required

[mos1984]

Hi,

I need to know how can i calculate the condensing temperature for the (NMP) N-Methyl-2-pyrrolidone.

Thank you for your advise

Regards

 

[Compositepro]

It is equal to the boiling point, which from memory is just under 400F. Boiling point varies with pressure. You can get that from the vapor pressure curve.

 

[mos1984]

the boiling temperature is 396F, but this is heated point, i need to know condensing temp. which is gas start to create moisture in the cooling coil.

 

[Latexman]

For a pure component, one single species, condensing temp. = boiling temp. Commercial NMP may have a lot of cats and dogs in it, so it may have a boiling point range and a condensing temperature range. You need specific data on this.

Good luck,
Latexman

To a ChE, the glass is always full - 1/2 air and 1/2 water.

 

[RVAmeche]

I've had to contact several chemical manufacturers for data and it shocks me how little information they have or say they can provide.

 

[mos1984]

Actually, I'm selecting a coil to reduce the temperature of the exhaust, air mixed with 5% of NMP, i know the entering temp is 70F and out is 52F, i need to know when will condensate started, in order to select the coil properly.

thank you all, actually this is first time for me and probably i need more help on that.

 

[Latexman]

You want the "dew point" of air mixed with 5% NMP. The moisture in that air could sway the results drastically, depending on the source of air, the % RH, and how it is or isn't treated. Just fyi.

Good luck,
Latexman

To a ChE, the glass is always full - 1/2 air and 1/2 water.