What property methods are used for the heat exchange process in methanol synthesis in Aspen?
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Hot gas inlet: Temperature 218°C, pressure 12 Mpa; components include H2, N2, CO, CO2, CH4, Ar. Cold gas inlet: Temperature 30°C, pressure 12 Mpa; components include H2, N2, CO, CO2, CH4, Ar, CH3OH, H2O. I would like to know what property calculation methods should be used in this situation. Does the choice of property calculation method depend on temperature, pressure, and composition? If the pressure is reduced from 12 MPa to 8 MPa, will the properties change?
The outlet temperature of the hot gas is 65℃