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    Mathematical modelling and numerical simulation of CO2/CH4 separation in a polymeric membrane

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    gilassi_rahmanian_2015.pdf (758.7Kb)
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    Publication date
    2015-11-01
    Author
    Gilassi, S.
    Rahmanian, Nejat
    Keyword
    Mathematical modelling; Solution-diffusion model; PTFE membrane; SIMPLE algorithm; Cross flow membrane cell
    Rights
    © 2015 Elsevier B.V. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
    Peer-Reviewed
    Yes
    
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    Abstract
    CO2 capture from natural gas was experimentally and theoretically studied using a dead-end polymeric permeation cell. A numerical model was proposed for the separation of CO2/CH4 using Polytetrafluoroethylene (PTFE) in a flat sheet membrane module and developed based upon the continuity, momentum and mass transfer equations. The slip velocity condition was considered to show the reflection of gas flow in contact with the membrane surface. The solution method was based on the well-known SIMPLE algorithm and implemented using MATLAB to determine the velocity and concentration profiles. Due to change in velocity direction in the membrane module, the hybrid differencing scheme was used to solve the diffusion-convection equation. The results of the model were compared with the experimental data obtained as part of this work and good agreement was observed. The distribution of CO2 concentration inside the feed and permeate chambers was shown and the velocity profile at the membrane surface was also determined using reflection factor for polymericmembrane. The modelling result revealed that increasing the amount of CO2 in gas feed resulted in an increase in the CO2 in the permeate stream while the gas feed pressure increased. By changing the permeability, the model developed by use of the solution-diffusion concept could be used for all polymeric membranes with flat sheet modules.
    URI
    http://hdl.handle.net/10454/10312
    Version
    Accepted Manuscript
    Citation
    Gilassi S and Rahmanian N (2015) Mathematical modelling and numerical simulation of CO2/CH4 separation in a polymeric membrane. Applied Mathematical Modelling. 39 (21): 6599-6611.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.apm.2015.02.010
    Type
    Article
    Collections
    Engineering and Informatics Publications

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