Vapour-Liquid equilibria at Low Concentration of One Component

Abstract

This thesis details experimental work performed on the development of a total pressure apparatus to acquire isothermal vapour-liquid equilibrium data for binary mixtures. The method has been demonstrated to be capable of producing up to 30 data points from one experimental run and provide data at very low concentrations of one component (< 10-4mole fraction). A literature survey is presented critically reviewing existing methods, particularly total pressure techniques. The survey also reviews theoretical models and correlations for predicting the non-ideal behaviour of mixtures. The theoretical basis of the correlations based on the "local mole-fraction" concept and their adaptability to "infinite dilution" prediction are discussed. The performance of the present apparatus has been tested using the binary mixtures; methanol-water, ethanol-water over the temperature range 25°C to 65°C. Data obtained has been compared with literature values, when available, and the behaviour of the mixtures approaching infinite dilution shown to correspond to that expected from Henry's Law. A computer program has been developed to analyse the raw data. The data from both systems has been fitted to some of the more commonly used correlations for predicting x-y behaviour. The difficulties met in fitting the data by the use of optimisation techniques are discussed.

Divisions: College of Business and Social Sciences > Aston Business School > Economics, Finance & Entrepreneurship
Additional Information: Copyright © D.B. Smith, 1975. D.B. Smith asserts their moral right to be identified as the author of this thesis. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without appropriate permission or acknowledgement. If you have discovered material in Aston Publications Explorer which is unlawful e.g. breaches copyright, (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately.
Institution: Aston University
Uncontrolled Keywords: Vapour-liquid equilibria,low concentration
Last Modified: 30 Sep 2024 07:24
Date Deposited: 21 Nov 2010 10:28
Completed Date: 1975-09
Authors: Smith, D.B.

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