Calculational methods for a single component in a multi-component gas phase
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Materials provided by the process package manufacturer: Gas phase parameters: pressure 0.398 MPa, temperature 39.5 degrees. Mole fractions of various components in the gas phase: nitrogen 49.348%, carbon monoxide 14.408%, carbon dioxide 8.156%, nitric oxide 3.045%, methanol 6.334%, ethanol 0.002%, methyl nitrite 18.702%, methyl formate 0.001%, water 0.004%. I checked the physical property data sheet and found that the saturated vapor pressure of methanol at 40 degrees is 35.7 kPa. According to the partial pressure law: 35.7 kPa/0.398 MPa = percentage of moles of methanol; the calculated percentage of moles of methanol is 8.9%. I would like to ask the experts: why are the results different from those provided in the process package? Is there something wrong with this calculation method?
The process package indicates whether methanol is saturated in the gas phase; if not, how can you assume that methanol is saturated? 6.3 of methanol is less than the saturation level, so there’s no problem
It doesn’t state saturation, but what it says makes sense
This needs to be calculated using the gas-liquid equilibrium equation and simulation software.