Q. Binary mixture of 100 kmol/hr enters into a flash drum has equimolar composition. The distillate obtained is 60 kmol/hr and the enthalpy of distillate, residue and feed are 500 KJ/kmol, 200 KJ/kmol and 400 KJ/kmol. Find the bottom flow rate in kmol/hr.

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Q. Find the ratio of distillate to residual flow rates, if a binary mixture containing 65% of more volatile component while the distillate and the residue compositions are 90% and 30%.

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Q. What happens to the liquid after preheating when enter to the cyclonic flash drum?

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Q. Express the flash vaporization

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Q. Find the heat given( in KJ) to the feed for the flash vaporization process if the ratio of residue to the distillate is 0.65 and the enthalpy of feed, distillate and the residue are 500, 800 and 200 KJ/kmol respectively. The feed rate is 100 kmol/hr.

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Q. Find the distillate and the residue rates in mole/hr, if the feed rate is 100 mol/hr; The compositions of feed, distillate and residue in terms of mole fraction are 0.65, 0.9 and 0.2.

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Q. Large number of flash distillation equals a differential distillation.

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Q. The column used for differential distillation is_______________

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Q. Simple distillation is a___________ process.

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Q. The initial portion of the distillate will be a low volatile component.

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Q. After the separation by differential distillation, the high volatile and low volatile components are stored in _____________

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Q. For a ternary mixture, the number of cuts required is_________

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Q. The differential distillation in order to maintain the equilibrium the process should be slow.

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Q. Pre-cooling is required before passing the vapour to the condenser in a still.

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Q. The equation applicable for batch distillation is _________

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Q. Estimate the feed rate, if the composition of the more volatile component in the feed is 50% and the residue is 10% and the equilibrium relation is given by y*= 1.975x. Also, the rate of residue is 60 mol/hr.

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Q. Find the rate of distillate, if the composition of the more volatile component in the feed is 50% and the residue is 10% and the equilibrium relation is given by y*= 1.975x. Also the rate of residue is 60 mol/hr.

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Q. Rectifying continuously is known as _____________

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Q. The top of the fractionators has ______ temperature.

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Q. The section above the feed tray in a fractionator is known as ______________

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