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The determination of diffusion coefficients of moderately soluble gases in liquids.

Adams, Michael Julyan. (1963) The determination of diffusion coefficients of moderately soluble gases in liquids. Doctoral thesis, University of Surrey (United Kingdom)..

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A rapid method of determining the diffusion coefficients of sparingly soluble gases in liquids with an accuracy of about 1% is described. The technique consists of measuring the rate of absorption of the gas in a laminar jet of the liquid, and by maintaining a constant liquid flow rate the entry and end effects are reduced to minimum significance. Diffusion coefficients of carbon dioxide in water over a range of temperatures from 18.5 °C to 75.1 °C, and of nitrous oxide in water and glycerol-water solutions at 20°C are determined. Where comparison is possible the results compare favourably with those of previous workers using other methods. The jet has also been used to determine values of c*√D for the carbon dioxide - monoethanolamine system over a range of amine concentrations from 0.988 to 4.738 moles/litre and an attempt has been made to estimate the "physical" solubility c* and the diffusion coefficient D from these values. A new interferometric method utilizing birefringence for determining gaseous diffusion coefficients directly from the gas to the liquid phase is introduced. This has the important advantage of a truly stagnant liquid surface, and a knowledge of gas solubilities is not required. The determination of the diffusion coefficient of carbon dioxide in water at 20 °C is described, and suggestions are made for improving the apparatus and for its application in a modified form to other spheres of gas-liquid mass-transfer.

Item Type: Thesis (Doctoral)
Divisions : Theses
Authors :
Adams, Michael Julyan.
Date : 1963
Contributors :
Additional Information : Thesis (Ph.D.)--University of Surrey (United Kingdom), 1963.
Depositing User : EPrints Services
Date Deposited : 22 Jun 2018 13:56
Last Modified : 06 Nov 2018 16:53

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