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Design a hollow-fiber membrane module for that purpose, assuming that the unit is capable of removing 99% of the dissolved oxygen.
A thin plate of solid salt, NaC1, measuring 15 by 15 cm, is to be dragged through seawater at a velocity of 0.6 ds.
Estimate the rate at which the crystal dissolves by calculating the flux of Na2 SO4, from the crystal surface to the bulk solution.
Ammonia, NH,, is being selectively removed from an air-NH, mixture by absorption into water.
One of the oldest membrane materials used for dialysis is porous cellophane, a thin, transparent sheet made of regenerated cellulose.
Knudsen diffusion in a porous solid Porous silica gel is used to adsorb propane from helium at 373 K and 1 atm.
Calculate the required pore size. Remember to calculate the new value of the Knudsen number to corroborate that you have used the correct.
An unglazed porcelain plate 5 mm thick has an average pore diameter of 0.2 pm. Pure oxygen gas at an absolute pressure of 20 mmHg, 400 K.
Consider the hydrodynamic flow of nitrogen at 400 K through the porous diaphragm described.
Oxygen uptake by the blood is faster than oxygen uptake by water because of the reaction of oxygen with hemoglobin.
At what radial position in the tissue surrounding the capillary entrance is the oxygen partial pressure down to 60.0 torr?
Calculate the mass-transfer coefficient in the gas phase at that point in the equipment, expressing the driving force in terms of mole fractions.
Estimate the mass-transfer coefficient, based on the average surface area of the particle, expressing the driving force in terms of partial pressures.
In a laboratory experiment, air at 300 K and 1 atm is blown at high speed parallel to the surface of a rectangular shallow pan that contains liquid acetone.
Water at 300 K flows down the inner wall. Dry air enters the bottom of the pipe at the rate of 1.04 m3/min, measured at 308 K and 1 atm.
Aeration is a common industrial process and yet one in which there is often serious disagreement about correlations (Cussler, 1997).
In the artificial kidney, blood flowing inside a tubular membrane is dialyzed against well-stirred saline solution.
A 1-m square thin plate of solid naphthalene is oriented parallel to a stream of air flowing at 20 ds. The air is at 330 K and 101.3 kPa.
Molecular diffusion of gaseous reactant and products takes place through a gas film adjacent to the carbon surface.
A solution of carbon tetrachloride and carbon disulfide containing 50%by weight of each is to be continuously distilled at a rate of 5000 kg/h.
The LNG is heated to 320 K and 140 kPa, and vaporizes completely. Estimate the density of the gas mixture under these conditions.
The molar fractions of CO2, and 0, in a sample of the gas are 12% and 6%, respectively. The weight fraction of H2O in the gas is 6.17%.
A gas stream flows at the rate of 10.0 m3/s at 300 K and 102 kPa. It consists of an equimolar mixture of ammonia and air.
Air, stored in a 30-m3 container at 340 K and 150 kPa, is saturated with water vapor. Determine the following properties of the gas mixture.
To account for water losses in the cooling tower, part of the effluent from a nearby municipal wastewater treatment plant will be used as makeup water.