Mass Transfer Operation - II — Winter 2021

Define : Reflux ratio, Minimum reflux ratio, Maximum reflux ratio

Explain flash distillation briefly.

Acontinuous distillation column is to be designed for separating 10,000 kg/hr of a liquid mixture containing 60 mole% water and remaining Methanol into an overhead product containing 3 mole% water and bottom product having 2% methanol. Amole reflux ratio of 3 is used. Calculate number of ideal plates. Consider feed is at its bubble point. Equilibrium data : x 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 y 0.417 0.579 0.669 0.729 0.78 0.825 0.871 0.915 0.959

Define: Absolute humidity, Saturated humidity, Relative humidity.

Explain wet bulb temperature briefly.

Discuss Extractive distillation.

Discuss Azeotropic distillation.

Derive Rayleigh equation for simple distillation.

Explain flash distillation.

Describe various types of cooling towers.

State assumptions of McCabe Thiele method.

Explain steam distillation.

Describe spray chamber with figure.

Define : Moisture content on wet basis, Bound moisture, Equilibrium moisture

Explain Liquid diffusion mechanism for movement of moisture within the solid.

Describe drum driers briefly.

Define : Moisture content on dry basis, Unbound moisture, Free moisture

Explain Capillary movement mechanism for movement of moisture within the solid.

Describe rotary driers briefly.

List any six principal adsorbents.

Classify types of adsorption and describe any one.

Explain adsorption wave1

Define: Heat of wetting, Differential heat of adsorption, Integral heat of adsorption.

Explain adsorption hysteresis.

Explain principle of ion exchange.