500 kg of a feed containing 35% methanol in water is fed to a flash drum. The fe

Question

500 kg 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 re, lambda = 2260 kJ/kg and lambda = 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 ration of 1.2. Table 1 VLE data for methanol-water

Explanation / Answer

answer is 4

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