UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Investigation on sound propagation for the measurement of diffusion in microporous solids.

Nori, M.; (2006) Investigation on sound propagation for the measurement of diffusion in microporous solids. Doctoral thesis , University of London. Green open access

[thumbnail of U592184.pdf] PDF
U592184.pdf

Download (9MB)

Abstract

The basic definitions of micropore diffusivities and the experimental techniques applied for their measurement are reviewed. Through a historical perspective, the techniques are briefly described, with an emphasis on the measured property, the theoretical and practical limitations. As a result the need for a novel experimental technique has been identified. The extension of the frequency response (FR) method to frequencies in the audible sound range is proposed. A detailed mathematical model is presented to describe the propagation of sound between two parallel adsorbing plates. The main body of the thesis is the description and derivation of a model that relates an acoustic quantity (i.e. propagation constant) to adsorption parameters (i.e. diffusivity and equilibrium constant) in microporous solids. The theoretical analysis describes the ranges of physical parameters where the complete model reduces to simplified versions: classical absorption isothermal limit equilibrium control temperature control. Based on the theoretical study a prototype apparatus has been designed and constructed. The system allows for flexibility in the loading of adsorbent material, geometrical properties and gas used. Preliminary experimental results are reported and interpreted based upon the theory of acoustics described above.

Type: Thesis (Doctoral)
Title: Investigation on sound propagation for the measurement of diffusion in microporous solids.
Identifier: PQ ETD:592184
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: Thesis digitised by ProQuest. Third party copyright material has been removed from the ethesis
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1444874
Downloads since deposit
212Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item