Write a short note on types of reflux ratio.
[3 marks]Relative Volatility (α) is the ratio of vapor pressure of the components- Prove this.
[4 marks]Write short note on adsorbents with their characteristics. Also state few i ndustrial applications of adsorption.
[7 marks]Explain Differential Distillation. Derive Rayleigh’s Equation.
[3 marks]Write in brief about Azeotropic distillation.
[4 marks]Derive operating line equation for Flash Distillation. Draw operating line for (a) Feed is totally vaporized (b) No feed is vaporized.
[7 marks]Amixture of 45 mol% Benzene and remaining Toluene is continuously fractioned in a tower. Feed is liquid at its boiling point and is introduced at 5 kmol/s rate. This gives 98 % benzene in distillate and 98 % toluene in bottoms. Find amount of Distillate and Bottoms. Find minimum reflux ratio and number of plates when total reflux is used. Equilibrium data in mole fraction is given as x 1 0.78 0.58 0.41 0.26 0.13 0.017 y 1 0.9 0.78 0.63 0.49 0.26 0.039
[7 marks]Write down the assumptions of McCabe-Thiele method.
[3 marks]Derive equation for Adiabatic Saturation Curve.
[4 marks]What is the selection criteria employed on the various types of cooling towers? Explain any one type of cooling tower in detail.
[7 marks]Discuss about various types of adsorption.
[3 marks]Explain Adsorption hysteresis.
[4 marks]Write Freundlich equation and explain. Write material balance for a single stage adsorption and apply Freundlich equation in it.
[7 marks]Differentiate between Bound, Unbound and Free moisture in context with the drying operations.
[3 marks]Discuss about ion exchange process used in softening of water.1
[4 marks]Derive the equation for the rate of adsorption in a fixed bed and explain the concept of degree of saturation.
[7 marks]Compare forced draft and induced draft cooling tower.
[3 marks]Define and explain followings: a) Equilibrium moisture b) Bound moisture c) Unbound moisture d) Critical moisture content
[4 marks]Explain Extractive distillation by citing proper example. Also write requirements of solvent to be used in distillation.
[7 marks]Briefly explain freeze drying.
[3 marks]Classify dryers and discuss selection criteria for dryers.
[4 marks]Explain construction, working, advantages & disadvantages of tray dryer.
[7 marks]Explain with the sketch, the principle and working of rotary dryer.
[3 marks]Explain with the sketch, the principle and working of fluidized bed drier?
[4 marks]Derive the relation to determine the time needed for constant and falling rate period of the batch drying operations.
[7 marks]