500 kg/s of a feed containing 35 % methanol In water Is fed to a flash drum. The

Question

500 kg/s of a feed containing 35 % methanol In water Is fed to a flash drum. The feed Is allowed to flash and the vapour stream is condensed. The condensed vapour is fed to a fractionating column where it is separated to produce a distillate stream containing 98 % methanol and a bottom product stream containing 5% methanol. Plot the equilibrium data for the mixture. Determine the amount of feed flashed to give a vapour stream containing 50 % methanol. Given the latent heats for water and methanol are. =2260 kJ/kg and 1104 kJ/kg determine the amount of super heat in the feed to the flash drum. Determine the number of Ideal stages In the fractionating column given a reflux ratio of 1.2. Table 1 VIE data for methanol-water

Explanation / Answer

answer is 4

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