Question: For a given feed mixture composition z and temperature T, a flash separation is possible at pressures between the dew-point and bubble-point pressures. Similarly, for
For a given feed mixture composition z and temperature T, a flash separation is possible at pressures between the dew-point and bubble-point pressures. Similarly, for a given feed mixture composition z and pressure P, a flash separation is possible at temperatures between the bubble-point and dew-point temperatures. (a) Assume mixtures of A and B obeys the 2CM activity coefficient model with A/RT= 1.6 and B/RT=0.5. Using Python (or Excel), determine the dew and bubble point pressures of a A / B mixture with composition zA=0.365 at T=395K, and perform a series of isothermal flash calculations at 395K and pressures equally spaced between the dew and bubble point pressures, with a pressure increment small enough so that you perform 10 or so flashes. Prepare a plot of the liquid fraction L and liquid product composition xA vs. P at T=395K. (b) Still assuming 2CM and the same composition as in (a), use Python (or Excel) to determine the dew and bubble point temperatures at a pressure of 2.755bar, and perform a series (again, about 10 or so) of isothermal flash calculations at P=2.755 bar and at temperatures equally spaced between the bubble and dew point temperatures, with an increment small enough so that you perform 10 or so flashes. Prepare a plot of the liquid fraction L and liquid product composition xA vs. T. Data: PAvap(T)=exp(1.98221.35/T(K))PBvap(T)=exp(2.45805.65/T(K)) If you choose to use Python, you can use the Jupyter notebook starter code provided, which implements all five calculation types for arbitrary Antoine functions and arbitrary activity coefficient models
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