• Login
    View Item 
    •   Home
    • Theses & Dissertations
    • 2018 - Mines Theses & Dissertations
    • View Item
    •   Home
    • Theses & Dissertations
    • 2018 - Mines Theses & Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Mines RepositoryCommunitiesPublication DateAuthorsTitlesSubjectsThis CollectionPublication DateAuthorsTitlesSubjects

    My Account

    Login

    Mines Links

    Arthur Lakes LibraryColorado School of Mines

    Statistics

    Display Statistics

    Synthesis and application of porous materials as supports for nanoparticle, single-site, and biomolecule heterogeneous catalysts

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Moyer_mines_0052E_11607.pdf
    Size:
    4.628Mb
    Format:
    PDF
    Download
    Author
    Moyer, Megan M.
    Advisor
    Trewyn, Brian
    Date issued
    2018
    Keywords
    inorganic materials
    nanoparticles
    supports
    mesoporous
    catalysis
    single-site
    
    Metadata
    Show full item record
    URI
    https://hdl.handle.net/11124/172563
    Abstract
    The application of porous materials as supports for catalysts has been a focus of academia and industry for many years. Mesoporous silicas (MSN) and ordered mesoporous carbons have been used due to their unique properties such as high surface area, tunable pore sizes, and chemical and thermal stability. These support materials often lend further stability to the catalysts they host, enabling their use in a wider variety of reaction environments. One type of porous support that has seen extensive use on an industrial scale is zeolites, and these can be paired with metal carbides formed in situ during methane dehydroaromatization, Fischer-Tropsch synthesis, or biomass conversion. Improvements to the synthesis of these carbides are made by altering the carburization gas mixture or adding promoter metals. Ordered mesoporous carbons templated from MSN are supports that not only have high surface area and good stability, but are also graphitic. However, their use at a large scale is limited by the time-consuming synthesis techniques, a lack of repeatability in batches, and poor thermal management when prepared in bulk. With simple kitchen tools, the process can reliably be scaled up while avoiding these problems. Further, these can be functionalized through a lithiation process, making them excellent hosts for single-site catalysts. MSN materials are effective supports for a variety of catalysts, including nanoparticle, molecular/single-site, and biomolecule. With their large pore size, more than one catalyst can be incorporated onto the support; a tandem Pd/Au nanoparticle system works cooperatively to facilitate the direct oxidative esterification of allyl alcohol at mild reaciton conditions. MSN materials can also be functionalized with organoalkoxysilanes via co-condensation resulting in a homogeneous distribution of functional groups. By adjusting the pre-hydrolysis time and hydrothermal treatment temperature, original particle morpholgy can be recovered after functionalization. These organic handles can further be reacted with a linker molecule to immobilize biocatalysts for unique reactions. Examining both the fundamental synthetic techniques and the applied side of these catalytic supports lends insight into how they can be used at a small or large scale.
    Rights
    Copyright of the original work is retained by the author.
    Collections
    2018 - Mines Theses & Dissertations

    entitlement

     
    DSpace software (copyright © 2002 - 2022)  DuraSpace
    Quick Guide | Contact Us
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.