Chemical Engineering Commons^™

Interphase Gas-Liquid Mass Transfer Study In A Horizontal Channel, Bruce R. Marx

Theses

The rate of transfer of hydrogen sulfide and of carbon dioxide from an atmosphere of the gas saturated with water to a flowing stream of water in a horizontal channel was investigated over a range of water flow velocities and absolute pressures.

Mathematical models describing the system in terms of the penetration and boundary layer theories were inadequate when used to calculate the diffusivity of each gas in water at various conditions. The results of the hydrogen sulfide-water system study shows a relationship between the diffusivity, the interfacial concentration and the liquid flow rate. The calculated diffusivity of the carbon …

Application Of Radioactive Tracers In The Study Of Diffusional Phenomena, Rodolfo Cilento

Theses

The study of mass transfer of a solute through a solvent can be greatly facilitated by the use of radioactive tracers.

This experiment was developed to demonstrate that by using radioactive tracers very small quantities of matter that would be very difficult to test chemically, can not only be tested but easily followed without disturbing the apparatus in which the diffusion is taking place.

Oleic Acid tagged with radioactive iodine (I¹³¹) was diffused through hexane at constant temperature in a glass column, one inch in diameter and thirty-six inches long.

The diffusion of Oleic Acid was followed by …

Diffusion Of Single And Multicomponent Solutes From Capillaries, Oleh S. Sklepkowycz

Theses

The purpose of this investigation was to determine the diffusion coefficients of several single and multi-component solutes, and to establish the relations between the diffusivity, the solute composition) and the diffusion rate. Such information pertinent to the extraction and leaching operations, can not be found in literature.

The procedure developed by Piret, Wbel, and Armstrong (25), involving observation of the extraction rate of two-phase mixtures from straight capillaries, was adopted and verified on a known sodium chloride-water system.

In the course of the experimental work diffusion coefficients more determined for ursolic acid, palmitic acid, and tripalmitin in methyl isobutyl ketone. …

Mass Transfer Into Cylindrical Liquid Films Measurement Of Liquid Diffusivities, Ronald Francis Lovenguth

Theses

This thesis was undertaken to augment and validate the previous work of Ratcliff and Reid⁽⁷⁾ in the area of diffusion of immiscible liquids. Their novel approach to this particular problem of liquid diffusion led the author to consider an experimental technique that has been used in gas-liquid studies. A short vetted-wall column was used to determine the rate of mass transfer of benzene and toluene into thin cylindrical films of water. A general analytical solution for the rate of mass transfer has been derived and is given below. This solution was checked using the system benzene-water.

G=3.63(Π(ρ_ω-ρ …