How is the saturated water content in a gas calculated?
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At a temperature of 50°C and a pressure of 0.2 MPa(a), how can the saturated water content in CO2 gas be calculated? Thank you, experts.
There are two methods. The first is to calculate based on ideal conditions: find the saturated vapor pressure of water at 50 degrees Celsius (which should be in the tens of kilopascals), and then use the fact that the ratio of pressures equals the ratio of amounts, in order to determine the concentration. Another approach is to use PROⅡ or ASPEN simulations. If you are interested, you can compare the results of the two.
For Aspen simulations, how do I set the feed parameters and block operation parameters? Thank you for your guidance!
How is simulation calculated? Could you explain it, expert?
The saturated vapor pressure at 50°C is Ps=12.35 KPa. The volume fraction of water vapor is = Ps/P_total = 12.35/200 = 6.175%. Assuming a mixture with a single volume component, the wet basis saturated moisture content Hwet = (0.06175/22.4*18) = 0.0262 kg of water per kg of wet mixture, while the dry basis saturated moisture content Hdry = (0.06175/22.4*18) = 0.0269 kg of water per kg of carbon dioxide.