Guess the interfacial area of a bubble with a gas volume of 2.5 x10^-3 cubic meters and diameter of 0.125 cm.

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Guess the diameter of the bubble for an air-water system in a sparged vessel with gas holdup of 0.1 and liquid flow rate of 0.15 meters per second.

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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In sparged vessel of area 50 cm and a gas holdup of 3 cubic meters per cubic meters, the flow rate of the gas is 5 cubic meters per second. The value of true gas velocity in meters per second is

asked Sep 21, 2022 in Mass Transfer by Julian (37.1k points)

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If the relative velocity of the gas and liquid inside the bubble column of cross sectional area 0.2 meters with gas holdup of 0.736 is 3.6 meters square per second. The expected slip velocity is

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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In a Sparged vessel of area 50 cm, the flow rate of the gas is 2 cubic meters per second then the value of superficial gas velocity in meters per second is

asked Sep 21, 2022 in Mass Transfer by Julian (37.1k points)

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In a Bubble column, if the velocity of the gas is low, then the bubble diameter is equals to______

asked Sep 21, 2022 in Mass Transfer by Julian (37.1k points)

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For a better stage efficiency, must have large interfacial surface and low mass transfer co-efficient.

asked Sep 21, 2022 in Mass Transfer by Julian (37.1k points)

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The fraction of volume occupied by the gas-liquid mixture in the equipment/vessel to the volume occupied by the gas is

asked Sep 21, 2022 in Mass Transfer by Julian (37.1k points)

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During gas dispersion, if a chemical reaction between gas and liquid phase is needed, then the preferred equipment is

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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For the multistage counter current gas dispersed operation, which of the following equipment is better?

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A solution contains 0.3 moles of solute A, 0.2 moles of B and 0.5 moles of C. What will be the mole fraction of A in the mixture?

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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The mass flow rate of a component in a mixture in X-direction is 2kg/s. The area vector at a particular cross-section is (1.1, 3.2, 5.4) cm2. Calculate the value of flux (kg/cm2.s) through the cross-section.

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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At equilibrium, the concentrations of N2=4.0 x10^-3M, O2 = 5.2 x 10^-3M and NO=3.9×10^-3M in a sealed vessel at 800K. What will be Kc for the reaction?

asked Feb 2, 2022 in Food Processing Unit Operations by Ava (110k points)

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In order to prepare Lithium nitride, air is passed gently over a reactor. Suppose that Nitrogen diffuse to a length 5cm before getting reacted with Lithium. Nitrogen reacts with lithium quickly so that partial pressure of Nitrogen at that point is 0. Reactor is a cylinder of length 10cm and diameter 2cm. Assume air to be a mixture of Nitrogen and Oxygen only. The temperature is 298K and total pressure 1atm. Diffusivity of N2 in O2 is 2*10^-5m^2/s. Calculate the Molar flux (mol/m^2.s) of N2 at a distance of 2.5cm from the top with respect to an observer moving with twice the mass average velocity a direction towards the liquid surface. (R=8.205*10^-5m^3atmK^-1mol^-1). Assume z=0 at the top of the reactor.

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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Guess the saturated molar absolute humidity of the gas(A.- Vapour(B. mixture at 100 degree Celsius. Vapour pressure of A is 300 mmHg and the total pressure is 760 mmHg.

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 ^5 N/m^2, find molar concentration of oxygen

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 ^5 N/m^2, find overall mass density

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 ^5 N/m^2, find molar fraction of nitrogen

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 ^5 N/m^2, find the average molecular weight of the mixture

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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A binary mixture of oxygen and nitrogen with partial pressures in the ratio 0.21 and 0.79 is contained in a vessel at 300 K. If the total pressure of the mixture is 1 * 10 ^5 N/m^2, find mass fraction of oxygen

asked Sep 20, 2022 in Mass Transfer by Julian (37.1k points)

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Find the gas phase mass transfer co-efficient for a unbound moisture to remove if the flux is 5 kg/sq.m sec and the difference in humidity of the liquid and the main stream is 0.5 units.

asked Sep 21, 2022 in Mass Transfer by Julian (37.1k points)

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A single plate clutch with both sides effective, has an outer diameter of 30 cm and inner diameter of 20 cm. the maximum intensity of pressure at any point in the contact surface is not exceed 1 kg/cm^2. If the co-efficient of friction is 0.3, determine the horse power transmitted by a clutch speed of 2000 rev/min.

asked Jan 29, 2022 in Farm Machinery by Olivia (38.9k points)

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Find J flux of A ( xA = 0.5) if the total N flux is 6 mol/sq.m sec and N flux of A is 3 mol/sq.m sec.

asked Sep 21, 2022 in Mass Transfer by Julian (37.1k points)

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A flat blade turbine having six blades is centrally installed in a vertical tank. The tank is 6 ft (1.83 m) in diameter; the turbine is 2 ft. (0.61 m) in diameter and is positioned 2 ft (0.61 m) from the bottom of the tank. The turbine blades are 5 in. (127 mm) wide. The tank is filled to a depth of 6 ft (1.83 m) with a solution of 50 percent caustic soda, at 150°F (65.6°C), which has a viscosity of 12 cP and a density of 93.5 lb/ft^3 (1498 kg/m^3). The turbine is operated at 90 r/min. the tank is baffled. What power will be required to operate the mixer? (Given KL=403680).

asked Feb 2, 2022 in Food Processing Unit Operations by Ava (110k points)

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