12. An aqueous methanol solution containing 25 mol% methanol will be rectified in a plate column equipped with a total c

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12 An Aqueous Methanol Solution Containing 25 Mol Methanol Will Be Rectified In A Plate Column Equipped With A Total C 1 (62.52 KiB) Viewed 21 times

12. An aqueous methanol solution containing 25 mol% methanol will be rectified in a plate column equipped with a total condenser, at 760 mm Hg bottom product containing 4 mol % methanol. The feed, which is at 20°C, will be introduced at a flow rate of 173 kmol/h. Operating reflux ratio to produce a 10 kmol/h saturated liquid side product containing 60 mol % methanol, a top product containing 95 mole percent methanol and a is selected as 1.235. Assuming constant overflow: a) Write the operating line equations for each section of the column. b) Calculate the number of the ideal plates needed and the locations of the feed and side product. c) the latent heat of vaporization of the solution are 76.5 kJ/kmol°C and 38000 kJ/kmol respectively. Equilibrium data: Vapor-liquid equilibrium for methanol-water system at 760 mm Hg is given below. Molar specific heat of the feed at mean temperature and T(°C) 64.5 65 X 66 67.6 69.3 100 96.4 93.5 91.2 89.3 87.7 84.4 78 75.3 73.1 71.2 0.0 0.02 0.04 0.06 0.08 0.10 0.20 0.30 0.40 0.50 0.60 0.0 0.134 0.23 0.304 0.365 0.418 0.579 0.665 0.729 0.779 0.825 0.87 0.95 0.90 0.80 1.0 0.70 y 0.958 0.915 1.0 0.979