Hi All,
I'd need to dope a gas mixture composed of 15% CO2 and 85% N2 with moisture. Ideally, I'd need to add a moisture % so that the flue gas contains saturated water vapor. The temperature of the flue gas is ca. 53 C.
Therefore, I was wondering how to convert the saturation pressure value at 53 C in the correspondent % by volume.
Thanks,
Antonio
If you consider A= CO2 B= N2 C=H2O
The total Pressure of the system
Pt= PCO2+PN2+PH2O then dividing by Pt, where PH2O=vapor pressure at T
1= Y CO2+Y N2 + YH2O ( at the temperature that you consider).
The molar fracction is the same as the volume fracction
I get your point. However, sorry but I still miss the link (conversion) between PH2O and YH2O.
Antonio, What are you actually trying to simulate? Are you trying to match actual flue gas composition from a furnace burning a hydrocarbon with air and cooling? If so you will probably need some excess air. The thermodynamics of pure hydrocarbon combustion and flue gas cooling are understood pretty well. You could model it in a spread heat with heat capacities and heat of reaction information or you could use a simulator like Hysys or Aspen Plus.
If you give me some more details I can probably show you how t model the system with Hysys or build a spreadsheet to model it.
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