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Q1. A continuous fractionating column, operating at atmospheric pressure, is to be designed to separate a mixture containing 15.67 per cent CS2 and 84.33 per
Q1. A continuous fractionating column, operating at atmospheric pressure, is to be designed to separate a mixture containing 15.67 per cent CS2 and 84.33 per cent CCl4 into an overhead product containing 91 per cent CS2 and a waste of 97.3 per cent CC14 all by mass. A plate efficiency of 70 per cent and a reflux of 3.16 kmol/kmol of product may be assumed. Using the following data, determine the number of plates required. The feed enters at 290 K with a specific heat capacity of 1.7 kJ/kgK and a boiling point of 336 K. The latent heats of CS2 and CCl4 are 25.9 kJ/kmol. CS2 in the vapour (Mole per cent) 0 8.23 15.55 26.6 33.2 49.5 63.4 74.7 82.9 87.8 93.2 CS2 in the liquid (Mole per cent) 0 2.36 6.15 11.06 14.35 25.85 33.0 53.18 66.30 75.75 86.04
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