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What would be the composition of a heptane-ctane solution that boils at 373 K under 80 kPa pressure?
A hollow, porous cylinder 25 m in OD, 15 mm in ID is fed internally with liquid diethyl ether at 293 K.
The activated carbon leaving the adsorber of Problem 3.16 is regenerated by countercurrent contact with steam at 380 K and 1 atm.
If the carbon flow rate is 20% above the minimum, what will be the concentration of benzene adsorbed on the carbon leaving?
It is desired to dry 10 kg of soap from 20% moisture by weight to no more than 6% moisture by contact with hot air.
Nicotine in a water solution containing 2% nicotine is to be extracted with kerosene at 293 K. Water and kerosene are essentially insoluble.
Water flows down the inside wall of a 25-mm-ID wetted-wall tower of the design shown in Figure, while air flows upward through the core.
Wilke and Hougan (1945) reported the mass transfer in beds of granular solids. Air was blown through a bed of porous celite pellets wetted with water.
The air flows at a rate of 2 m/s, based on the empty cross section of the bed. The porosity of the bed is 40%.
An air-water vapor mixture flows upward through a vertical copper tube of 25.4 mm OD, 1.65 mm wall thickness, which is surrounded by flowing cold water.
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.