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    Home > Chemicals Industry > New Chemical Materials > Rare earth-platinum alloy catalyst with 20 times longer service life comes out

    Rare earth-platinum alloy catalyst with 20 times longer service life comes out

    • Last Update: 2022-03-17
    • Source: Internet
    • Author: User
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    The Korean research team used mesoporous zeolite to successfully prepare rare earth-platinum alloy nanoparticles.
    The particles are used as catalysts for propylene dehydrogenation process.
    The addition of rare earth La and Y greatly improves the dispersibility of platinum in the molecular sieve.
    Compared with the widely used porous alumina-supported Pt-Sn bimetallic catalyst, the catalytic activity is increased by more than 10 times, and the service life is prolonged by more than 20 times.
    The research team of the Korean Academy of Science and Technology completed this result.
    The paper was published in the journal Nature recently.
    In the study, mesoporous zeolite with a pore size of less than 0.
    55 nanometers and a uniform and continuous spatial structure was used as the carrier for preparing the catalyst.
    Due to the lack of silicon atoms on the surface of mesoporous zeolites, there are framework defects called silanol groups on the surface.
    Rare earth oxides can exist in the form of atomic metal compounds, and can form an alloy with platinum in a specific structure during the hydrogen heat treatment process.
    Dehydrogenation is an important process for the production of propylene in the petrochemical industry.
    Thanks to the shale gas revolution, research in this field has always been active.
    The currently used Pt-Sn bimetallic catalyst has been around for nearly 30 years, and the industry has not found a feasible way to improve the failure of catalyst coke deposits.
    Previous studies have suggested that rare earth oxides have a stable structure and cannot form alloys with platinum through heating and hydrogenation reactions.
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