For which of the following unit operations, Lewis number is of significance?

Related MCQs

• Schmidt number and Lewis number for pure air at atmospheric conditions are respectively
• Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of
• Lewis number (Le) is
• The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around
• If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is
• In which of the following unit operations, the selectivity is an important parameter?
• Which of the following unit operations makes use of Thiele-Geddes equation?
• H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is
• For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower)
• Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m2 and the solvent flow, rate is 400 moles of S/m2 . hr. The equilibrium data is represented by Y = 3X2 , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is