If the liquid is 0.10 mole fraction h-butane, find the compositions of Iiquid and vapor. a)ĭew Point Calculation T (0 C)= T (0 R)= KĪ mixture of n-butane, n-pentane, and n-hexane is at 120° F and 20 psia. Use the aEP value to generate the y-x equilibrium diagram.įind the dew-point and bubble-point temperatures for a mixture that is 20 mole ~o n-butane, 50 mole % n-pentane, and 30 mole % n-hexane. from Introduction to Chemical Engineering Thermodynamics (7th ed) by Smith, J.M., Van. However, sometimes Wegstein or Newton-Raphson methods are employed as convergence acceleration promoters. A t 1 atm, the ethylene dibromide-propy lene dibromide system has a constant relative volatility of a= 1.30 (Perry et al., 1963, p. K (or DePriester) Chart (low T range) in American Engineering Units. Ser., 49 (7), 1 (1953).) 278 Equilibrium Flash Vaporization and Partial Condensation igure 75 Continued. DePriester charts Source: A Dictionary of Chemical Engineering Author(s): Carl Schaschke Nomographs that present the complex relationships between pressure, temperature, and K-factor for various light and heavy hydrocarbons. When 80% has been vaporized, what iS the temperature and what are the liquid and vapor compositions?ĭ1l. At what temperature would it stop boiling (assume no material is removed)? What is the composition of the last dropIet of liquid? c.
At what temperature does it first begin to boil? What is the composition of the first bubble of vapor? b. If a 40 mole % ethanol, 60 mole % water mixture at 60° C and 1 atm is heated: -Ī. The last line gives the mean errors in the K values compared to the values from the DePriester charts. At what temperature would it stop boiling (assume no material is removed) What is the composition of the last dropIet of liquid c. The constants aT1, aT2, aT6, ap1, ap2, and ap3 are given in Table 2-3. At what temperature does it first begin to boil What is the composition of the first bubble of vapor b.
Use the DePriester chart to generate the temperature-composition diagram for isobutane and propane at 1000 kPa. If a 40 mole ethanol, 60 mole water mixture at 60° C and 1 atm is heated: - a. 4000 N 5000 1.5 6000 Methane ( a ) FIGURE 8.3 ( a ) De Priester chart.