What are different methods of conducting mass transfer operations at commercial scale?
[3 marks]With reference to concept of equilibrium, Explain the principles for interphase mass transfer between two insoluble phases.
[4 marks]State different theories used to explain the meaning of mass transfer coefficients. Explain any one in detail.
[7 marks]Draw classification chart of mass transfer operations.
[3 marks]Explain the temperature and pressure dependency of diffusivity of gases and liquid.
[4 marks]State and explain Fick’s first law of diffusion Also, differentiate between flux Nand J . Additionally, Prove that for unidirectional A A binary diffusion J = - J . A B
[7 marks]Calculate the rate of diffusion of Acetic acid (A) across a film of non- diffusing water (B) solution 1 mm thick at 17oC when the concentrations on opposite sides of the film are respectively 9 and weight % acid. The diffusivity of acetic acid in the solution is 0.95 x 10-9 m2/s. Density of 9 and 3 weight % aqueous solutions is 1012 kg/m3 and 1003.2 kg/m3 respectively. M = 60, M = 18. A B
[3 marks]Classify gas-liquid equipment based on phases being dispersed with examples.
[3 marks]Define the terms : (i) Flooding (ii) Coning (iii)Weeping (iv)Dumping
[4 marks]Write a short note on minimum liquid gas ratio in case of gas absorption.
[7 marks]Define absorption factor Aand Stripping factor S.
[3 marks]Explain HETP, HTU and NTU for packed bed absorption column.
[4 marks]Differentiate between Tray tower and Packed tower.
[7 marks]Define ideal and non-ideal solutions with reference to multi-component absorption and state the characteristics of ideal solution.
[3 marks]Enlist different industrial liquid extraction equipment and explain any one in detail.
[4 marks]Discuss the system of three liquids- one pair partially soluble and the effect of temperature on these ternary equilibria in case of liquid extraction.
[7 marks]Explain gas absorption with chemical reaction in brief.
[3 marks]Discuss various factors to be considered in making choice of solvent for liquid extraction.
[4 marks]150 kg of nicotine-water solution containing 1% nicotine is to be extracted with 250 kg of kerosene at 20oC. Water and kerosene are essentially immiscible in each other, Determine the % extraction of nicotine after single stage. The equilibrium relationship is Y*=0.798 X, where Xand Y* are expressed as kg nicotine/kg kerosene and kg nicotine/kg water respectively.
[7 marks]State different types of packing materials and explain their selection criterion.
[3 marks]What is crystallization? Discuss effect of temperature on solubility.
[4 marks]Discuss the preparation of solids in leaching and also explain rate of leaching.
[7 marks]Write a note on Ventury scrubber.
[3 marks]Explain any one crystallization equipment in detail.
[4 marks]Explain Shanks system for leaching.
[7 marks]