Bubblepoint conditions

Representative x-y diagrams appear in Figure 13.4. Generally they are plots of direct experimental data, but they can be calculated from fundamental data of vapor pressure and activity coefficients. The basis is the bubblepoint condition ... 

Jersey Critical correlation, 432 liquid gradient, 433 Souders-Brown correlation, 432 Bubblepoint conditions, 375, 376 calculation diagram, 379 example, 378,379... 

The problems of interest are finding the conditions for onset of vaporization, the bubblepoint for the onset of condensation, the... 

At temperatures and pressures between those of the bubblepoint and dewpoint, a mixture of two phases exists whose amounts and compositions depend on the conditions that are imposed on the system. The most common sets of such conditions are fixed T and P, or fixed H and P, or fixed S and P. Fixed T and P will be considered first. 

The third equation is used to provide a pressure-compensated temperature measurement in the methanol column. This is needed because, in the heat-integrated system, the pressure in the methanol column is not controlled. It floats with operating conditions. If more heat transfer is required in the reboiler/condenser, a larger temperature difference is required, and this is achieved by the pressure in the methanol column increasing, which raises the bubblepoint temperature in the reflux drum. 

The reservoir oil has a gravity of 40° API and a viscosity of 12.2 cp at reservoir conditions. Initid reservoir pressure was 3,300 psia, and temperature was 120°F. The bubblepoint pressure was about 2,830 psia. CO2 miscibility pressure (discussed in Chap. 6) was 1,650 psia, and thus, a CO2 miscible flood was considered to be an appropriate EOR process to be applied. 

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