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    Tröger’s Base Ladder Polymer for Membrane-Based Hydrocarbon Separation

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    Abdulrahman_Alhazmi_s_Thesis Final.pdf
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    Description:
    Abdulrahman Alhazmi - Masters Thesis
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    Type
    Thesis
    Authors
    Alhazmi, Abdulrahman cc
    Advisors
    Pinnau, Ingo cc
    Committee members
    Peinemann, Klaus-Viktor cc
    Han, Yu cc
    Program
    Chemical and Biological Engineering
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Date
    2017-05
    Embargo End Date
    2018-05-09
    Permanent link to this record
    http://hdl.handle.net/10754/623653
    
    Metadata
    Show full item record
    Access Restrictions
    At the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis became available to the public after the expiration of the embargo on 2018-05-09.
    Abstract
    The use of polymeric membranes for natural gas separation has rapidly increased during the past three decades, particularly for carbon dioxide separation from natural gas. Another valuable application is the separation of heavy hydrocarbons from methane (fuel gas conditioning), more importantly for remote area and off-shore applications. A new potential polymeric membrane that might be utilized for natural gas separations is a Tröger’s base ladder polymer (PIM-Trip-TB-2). This glassy polymeric membrane was synthesized by the polymerization reaction of 9, 10-dimethyl-2,6 (7) diaminotriptycene with dimethoxymethane. In this research, the polymer was selected due to its high surface area and highly interconnected microporous structure. Sorption isotherms of nitrogen (N2), oxygen (O¬2), methane (CH4), carbon dioxide (CO2), ethane (C2H6), propane (C3H8), and n-butane (n-C4H10) were measured at 35 °C over a range of pressures using a Hiden Intelligent Gravimetric Analyzer, IGA. The more condensable gases (C2H6, CO2, C3H8, and n-C4H10) showed high solubility due to their high affinity to the polymer matrix. The permeation coefficients were determined for various gases at 35 °C and pressure difference of 5 bar via the constant-pressure/variable-volume method. The PIM-Trip-TB-2 film exhibited high performance for several high-impact applications, such as O2/N2, H2/N2 and H2/CH4. Also, physical aging for several gases was examined by measuring the permeability coefficients at different periods of time. Moreover, a series of mixed-gas permeation tests was performed using 2 vol.% n-C4H10/98 vol.% CH4 and the results showed similar transport characteristics to other microporous polymers with pores of less than 2 nm. The work performed in this research suggested that PIM-Trip-TB-2 is suitable for the separation of: (i) higher hydrocarbons from methane and (ii) small, non-condensable gases such as O2/N2 and H2/CH4.
    Citation
    Alhazmi, A. (2017). Tröger’s Base Ladder Polymer for Membrane-Based Hydrocarbon Separation. KAUST Research Repository. https://doi.org/10.25781/KAUST-S360Q
    DOI
    10.25781/KAUST-S360Q
    ae974a485f413a2113503eed53cd6c53
    10.25781/KAUST-S360Q
    Scopus Count
    Collections
    MS Theses; Physical Science and Engineering (PSE) Division; Chemical Engineering Program

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