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  • CEP 6826_accepted version 2016

    Rights statement: This is the author’s version of a work that was accepted for publication in Chemical Engineering and Processing. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemical Engineering and Processing, 108, 2016 DOI: 10.1016/j.cep.2016.07.008

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    Available under license: CC BY-NC-ND: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License

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Kinetics and reactive stripping modelling of hydrogen isotopic exchange of deuterated waters

Research output: Contribution to journalJournal article

Published
  • Mohammed Aldehani
  • Faris Alzahrani
  • Meabh Nic An tSaoir
  • Daniel Luis Abreu Fernandes
  • Suttichai Assabumrungrat
  • Farid Aiouache
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<mark>Journal publication date</mark>10/2016
<mark>Journal</mark>Chemical Engineering and Processing: Process Intensification
Volume108
Number of pages16
Pages (from-to)58-73
Publication statusPublished
Early online date21/07/16
Original languageEnglish

Abstract

This work presents results of experimental kinetics and modelling of the isotopic
exchange between hydrogen and water in a reactive stripping column for water dedeuteriation. The missing physical properties of deuterium and tritium isotopologues in hydrogen gas and water forms were predicted and validated using existing literature data. The kinetic model relevant to a styrene-divinyl-benzene co-polymer–supported platinum catalyst was used for modelling, by Aspen plus modular package, impact of design parameters including temperature, total pressure, gas to liquid flowrate ratio, pressure drop and flow mixing, on the separation of deuterium and further the separation of tritium. The modelling by the rate-based non-equilibrium, including design correlations of model of mass and heat transfers, chemical kinetic constants, mass transfer
coefficients and overall exchange rate constants, allowed access to separation trends in a good agreement with published data. The synergy between the rates of chemical isotopic exchange and gas/liquid mass transfer, and by inference the performance of reactive stripping, was particularly sensitive to high temperatures, low hydrogen flow rates, pressure drops and internals properties.
Extension to tritium confirmed a slightly slower mass transport compared with deuterium leading to potentially under-estimated design features for detritiation processing when deuterium is used instead.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Chemical Engineering and Processing. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemical Engineering and Processing, 108, 2016 DOI: 10.1016/j.cep.2016.07.008