Abstract
Psychrometric charts for three different systems involving condensing alcohol vapour in nitrogen are presented. The alcohols considered are methanol, ethanol and n-propanol. The charts are based upon semi-theoretical equations and make use of published physical property data and correlations. The behaviour of the vapour phase is characterised by the Virial Equation of State truncated at the third term. The solubility of nitrogen in the liquid alcohols is also considered. The charts are constructed with the dry bulb temperature and absolute humidity scales as the orthogonal axes. Curves of constant adiabatic saturation temperature, constant relative humidity, constant gas specific volume and constant enthalpy deviation are plotted on the charts.
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Abbreviations
- B:
-
second virial coefficient
- c:
-
correlation coefficient
- C:
-
third virial coefficient
- CP :
-
ideal gas heat capacity
- f:
-
enhancement factor
- g1, g2 :
-
functions defined in Eqs. (21) and (22)
- ĥ:
-
real gas specific enthalpy
- ĥdev :
-
enthalpy deviation
- ĥ f :
-
condensed phase enthalpy
- ĥo′’:
-
enthalpy correction
- kH :
-
henry’s law constant
- MW:
-
molecular weight
- Pc :
-
critical pressure
- PV :
-
vapour pressure
- PT :
-
total pressure
- R:
-
universal gas constant
- T:
-
absolute temperature
- Tad :
-
adiabatic saturation temperature
- Tc :
-
critical temperature
- Tdatum :
-
enthalpy datum temperature
- Tr :
-
reduced temperature
- Vc :
-
critical volume
- VVc :
-
liquid molar volume
- x:
-
mole fraction
- Zc :
-
critical compressibility factor
- ϕ:
-
relative humidity
- κ:
-
isothermal compressibility
- λ:
-
latent heat of vaporization
- ω:
-
acentric factor
- G:
-
non-condensing gas component
- m:
-
mixture
- S:
-
saturation condition
- V:
-
condensing vapour component
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Shallcross, D.C. Preparation of psychrometric charts for alcohol vapours in nitrogen. Korean J. Chem. Eng. 17, 93–100 (2000). https://doi.org/10.1007/BF02789260
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DOI: https://doi.org/10.1007/BF02789260