500 kgmole/hr mutilcomponent mixture with 40% n-hexane, 30% heptanes and 30% n-octane is to be fed...
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500 kgmole/hr mutilcomponent mixture with 40% n-hexane, 30% heptanes and 30% n-octane is to be fed to a distillation column. The recovery of n-hexane in the top product is 98% and for the n-heptane in the bottom product is 96%. The column 1.2 atm, 105°Cand 60% vaporized feed and reflux ratio is 7.5 The Antoine equation can be applied to each component logpsat (mmHg) = A Component n-hexane n-heptane n-octane A 6.87 6.89 6.92 B 1171.2 1264.9 1352.0 Assume tray spacing 24in specific gravity for liquid -0.7 surface tension 10 dyne/cm 80% flooding and 15% downcomer area. Estimate B T(°C) + C C 224.4 216.5 209.2 a) Column diameter, m b) No. of stages c) Feed location d) Height of packing if packed column is used with 25 mm metal Pall rings assuming liquid viscosity is 15 cp and the average molecular weight of liquid and gas is 80 throughout the column (40 pts) 500 kgmole/hr mutilcomponent mixture with 40% n-hexane, 30% heptanes and 30% n-octane is to be fed to a distillation column. The recovery of n-hexane in the top product is 98% and for the n-heptane in the bottom product is 96%. The column 1.2 atm, 105°Cand 60% vaporized feed and reflux ratio is 7.5 The Antoine equation can be applied to each component logpsat (mmHg) = A Component n-hexane n-heptane n-octane A 6.87 6.89 6.92 B 1171.2 1264.9 1352.0 Assume tray spacing 24in specific gravity for liquid -0.7 surface tension 10 dyne/cm 80% flooding and 15% downcomer area. Estimate B T(°C) + C C 224.4 216.5 209.2 a) Column diameter, m b) No. of stages c) Feed location d) Height of packing if packed column is used with 25 mm metal Pall rings assuming liquid viscosity is 15 cp and the average molecular weight of liquid and gas is 80 throughout the column (40 pts) 500 kgmole/hr mutilcomponent mixture with 40% n-hexane, 30% heptanes and 30% n-octane is to be fed to a distillation column. The recovery of n-hexane in the top product is 98% and for the n-heptane in the bottom product is 96%. The column 1.2 atm, 105°Cand 60% vaporized feed and reflux ratio is 7.5 The Antoine equation can be applied to each component logpsat (mmHg) = A Component n-hexane n-heptane n-octane A 6.87 6.89 6.92 B 1171.2 1264.9 1352.0 Assume tray spacing 24in specific gravity for liquid -0.7 surface tension 10 dyne/cm 80% flooding and 15% downcomer area. Estimate B T(°C) + C C 224.4 216.5 209.2 a) Column diameter, m b) No. of stages c) Feed location d) Height of packing if packed column is used with 25 mm metal Pall rings assuming liquid viscosity is 15 cp and the average molecular weight of liquid and gas is 80 throughout the column (40 pts)
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