A solution has the following composition, expressed as mol percentage: ethane, \(0.25 \%\); propane, \(25 \%\); isobutane, \(18.5 \%\); \(n\)-butane, \(56 \%\); isopentane, \(0.25 \%\). In the following, the 3 pressure is 10 bars. Use equation (6-106) and Table 6.4 to calculate equilibrium distribution coefficients.

Table 6.4:-

Equation 6-106:-

(a) Calculate the bubble point.

(b) Calculate the dew point.

(c) Forty mol\% of the feed is flash-vaporized. Calculate the temperature and composition of the products.

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Table 6.4 Constants in Equation (6-106): T in K, P in kPa Compound - aT2 -ap1 ap2 aps Methane 90,389 9.9730 0.89510 2846.4 0 Ethylene 185,209 9.5411 0.84677 2042.6 0 Ethane 212,114 9.6178 0.88600 2331.8 0 Propylene 285,026 9.4141 0.87871 2267.6 0 Propane 299,595 8.6372 0.76984 0 47.6017 Isobutane 360,138 9.5073 0.92213 0 0 n-Butane 395,234 9.8124 0.96455 0 0 Isopentane 457,279 9.3796 0.93159 0 0 n-Pentane 470,645 9.0527 0.89143 0 0 n-Hexane 549,044 8.6021 0.84634 0 n-Heptane 621,544 8.0651 0.79543 0 00 Source: Data from McWilliams (1973).